Dental Admission Test (DAT) — Questions and Answers

Question 1: An 'application' question on the DAT asks you to:

Count the number of paragraphs
Restate a fact verbatim
Apply the passage's principle to a new or hypothetical situation (Correct answer)
Identify the author's name

Correct answer: Apply the passage's principle to a new or hypothetical situation

Application questions extend passage logic to new scenarios.

Question 2: When a net folds into a three-dimensional figure, faces opposite each other will:

Point in the same direction
Always share an edge
Become a single face
Never touch or share an edge (Correct answer)

Correct answer: Never touch or share an edge

Opposite faces are separated by other faces and share no common edge.

Question 3: If 10 g of CaCO3 (molar mass 100) decomposes, how many moles of CaO form (1:1 ratio)?

1.0 mol
10 mol
0.20 mol
0.10 mol (Correct answer)

Correct answer: 0.10 mol

10 g / 100 g/mol = 0.10 mol CaCO3, giving 0.10 mol CaO.

Question 4: When folding a net into a cube, two faces that share an edge in the flat pattern will be:

Removed during folding
Opposite in the cube
Adjacent in the cube (Correct answer)
The same face

Correct answer: Adjacent in the cube

Faces sharing an edge on the net remain adjacent (perpendicular) once folded.

Question 5: What is the value of f(g(x)) if f(x)=2𝑥³+5𝑥²+2𝑥 and g(x)= -2?

0 (Correct answer)
4
36
32
24

Correct answer: 0

To find f(g(x)), we first evaluate the inner function g(x). Since g(x) is given as -2, we substitute this value into the function f(x). This means we need to calculate f(-2). Plugging -2 into the expression for f(x) yields 2(-2)³ + 5(-2)² + 2(-2), which simplifies to 2(-8) + 5(4) - 4, or -16 + 20 - 4, ultimately resulting in 0.

Question 6: In how many ways can the letters of the word 'DAT' be arranged?

9
6 (Correct answer)
3
12

Correct answer: 6

Three distinct letters give 3! = 6 arrangements.

Question 7: During strenuous exercise, muscle cells may switch to anaerobic respiration. What is the primary purpose of converting pyruvate to lactate in this process?

To regenerate NAD+ from NADH (Correct answer)
To directly generate more glucose for the muscles
To produce additional ATP through substrate-level phosphorylation
To shuttle electrons directly to the electron transport chain

Correct answer: To regenerate NAD+ from NADH

The primary purpose of lactic acid fermentation is to regenerate NAD+ from the NADH produced during glycolysis. This allows glycolysis to continue producing a small amount of ATP even in the absence of oxygen, which is required for the electron transport chain to function and regenerate NAD+ aerobically.

Question 8: In the Paper Folding subtest, a flat sheet is folded and then what is done before unfolding?

It is painted
One or more holes are punched through it (Correct answer)
It is cut into strips
It is weighed

Correct answer: One or more holes are punched through it

Holes are punched through the folded paper, and you predict the unfolded hole pattern.

Question 9: What is the conjugate base of water (H2O)?

Hydronium (H3O+)
Hydroxide (OH-) (Correct answer)
Peroxide (O2 2-)
Oxide (O2-)

Correct answer: Hydroxide (OH-)

Removing a proton from water yields the hydroxide ion.

Question 10: Effective nuclear charge (Zeff) is best described as:

The repulsion force between electrons in the same orbital
The net positive charge felt by a valence electron after accounting for electron shielding (Correct answer)
The total number of protons in the nucleus
The formal charge on an ion after electron transfer

Correct answer: The net positive charge felt by a valence electron after accounting for electron shielding

Zeff is the actual nuclear attraction experienced by a valence electron, reduced from the full nuclear charge (Z) by the shielding effect of inner-shell electrons.

Question 11: How many moles are in 88 g of CO2 (molar mass 44)?

1.0 mol
4.0 mol
0.5 mol
2.0 mol (Correct answer)

Correct answer: 2.0 mol

88 g / 44 g/mol = 2.0 mol.

Question 12: What is the probability of flipping a fair coin twice and getting two heads?

1/3
3/4
1/4 (Correct answer)
1/2

Correct answer: 1/4

Each flip is 1/2, so 1/2 × 1/2 = 1/4.

Question 13: Which chromosomal abnormality is responsible for Down syndrome?

Translocation of chromosome 14
Deletion of chromosome 21
Trisomy 21 (Correct answer)
Monosomy 21

Correct answer: Trisomy 21

Down syndrome is caused by trisomy 21, the presence of an extra copy of chromosome 21.

Question 14: If a paper is folded in half twice (into quarters) and one hole is punched, how many holes appear unfolded?

1
3
4 (Correct answer)
2

Correct answer: 4

Two folds create four layers, so one punch yields four holes.

Question 15: A pyramid net consists of a square base and four triangles. When folded, the triangle apexes:

Meet at a single top point (Correct answer)
Stay separated
Fold under the base
Form a flat lid

Correct answer: Meet at a single top point

The four triangular faces rise and converge at one apex above the base.

Question 16: Which combination forms an effective buffer?

CH₃COOH and CH₃COONa (Correct answer)
NaOH and NaCl
HCl and NaCl
H₂SO₄ and Na₂SO₄

Correct answer: CH₃COOH and CH₃COONa

An effective buffer requires a weak acid and its conjugate base, such as acetic acid (CH₃COOH) and sodium acetate (CH₃COONa).

Question 17: Which of the following molecules is a meso compound?

(S)-2-Butanol
(2R,3S)-Tartaric acid (Correct answer)
trans-1,2-Dimethylcyclopropane
(2R,3R)-Tartaric acid

Correct answer: (2R,3S)-Tartaric acid

A meso compound is an achiral molecule that contains chiral centers and an internal plane of symmetry. (2R,3S)-Tartaric acid has two chiral centers but possesses an internal plane of symmetry, making it achiral and thus a meso compound. The optical rotations from its two chiral centers cancel each other out.

Question 18: How many stereoisomers are possible for a molecule with 3 stereocenters and no internal symmetry?

4
6
8 (Correct answer)
9

Correct answer: 8

The maximum number of stereoisomers is 2^n, so 2^3 = 8.

Question 19: A rectangular box net has faces of different sizes. The two largest faces will be:

Opposite and parallel to each other (Correct answer)
On the same side
Adjacent and perpendicular
Merged into one face

Correct answer: Opposite and parallel to each other

In a rectangular solid, matching-size faces sit opposite and parallel.

Question 20: What is the pOH of a solution where [OH⁻] = 1 × 10⁻⁵ M?

14
7
5 (Correct answer)
9

Correct answer: 5

pOH = -log[OH⁻] = -log(10⁻⁵) = 5.

Question 21: In a diploid organism, how many alleles does each individual carry for a given gene?

2 (Correct answer)
4
1
3

Correct answer: 2

Diploid organisms carry two alleles for each gene, one inherited from each parent.

Question 22: The square has a 2 meter side. In m², what is the hashed area?

None of the above
2π - 4 (Correct answer)
4π - 3
4π - 8
4π - 6

Correct answer: 2π - 4

The problem describes a square with a side length of 2 meters. The expression 2π - 4 represents the area of a circle that circumscribes this square, minus the area of the square itself. The diagonal of a square with side 2 is 2√2, which is the diameter of the circumscribing circle, making its radius √2. The area of this circle is π(√2)² = 2π, and the area of the square is 2² = 4. Therefore, the hashed area, representing the regions within the circle but outside the square, is 2π - 4.

Question 23: On the DAT Reading Comprehension section, what is the best initial strategy when encountering a dense scientific passage?

Memorize every detail before answering
Read only the first and last paragraphs
Skip the passage and guess all questions
Map the passage structure and locate key ideas, then refer back for specifics (Correct answer)

Correct answer: Map the passage structure and locate key ideas, then refer back for specifics

Mapping structure lets you locate details efficiently rather than memorizing everything.

Question 24: If a shaded triangle on the net points toward a fold line, after folding it will most likely:

Flip to the opposite side
Disappear inside the solid
Meet the adjacent face along that edge (Correct answer)
Stay flat and unfolded

Correct answer: Meet the adjacent face along that edge

Markings near a fold line connect to the adjacent face across that edge.

Question 25: DNA replication is called semi-conservative because each new double helix contains:

Two newly synthesized strands
One parental strand and one new strand (Correct answer)
Fragments of multiple original strands
Only recycled parental strands

Correct answer: One parental strand and one new strand

Semi-conservative replication means each daughter DNA molecule retains one parental strand paired with one newly synthesized strand.

Question 26: What happens to pH when the buffer capacity is exceeded by addition of a large amount of strong base?

pH decreases
The solution converts to pure water
pH increases dramatically once the buffer capacity is exhausted (Correct answer)
pH remains constant

Correct answer: pH increases dramatically once the buffer capacity is exhausted

Once all the weak acid component is consumed, additional strong base causes a sharp, dramatic increase in pH.

Question 27: In the context of the third paragraph, what is the best definition for the word 'adsorbing'?

Chemically reacting with and dissolving the ice.
Accumulating on the surface of the ice crystals. (Correct answer)
Repelling and pushing the ice crystals away.
Absorbing and integrating into the crystal's interior.

Correct answer: Accumulating on the surface of the ice crystals.

The sentence reads, 'By adsorbing to the surface of ice, they inhibit the growth of these crystals...' The phrase 'to the surface' provides direct context, indicating that adsorption is a surface phenomenon where molecules adhere to the exterior of a substance, as opposed to absorption, which involves permeating the interior.

Question 28: In the Cube Counting subtest, the figure is a stack of cubes that has been what?

Left completely unpainted
Painted on every exposed face except the bottom (Correct answer)
Painted on all faces, including the bottom
Painted only on top

Correct answer: Painted on every exposed face except the bottom

By convention every exposed surface is painted except the bottom resting on the table.

Question 29: If the probability of an event is 0.35, what is the probability it does NOT occur?

0.50
0.35
0.65 (Correct answer)
0.75

Correct answer: 0.65

The complement is 1 − 0.35 = 0.65.

Question 30: A pattern for a cube has faces marked with different shadings. The pattern is a vertical column of four squares, with two additional squares attached to the right side of the second and third squares from the top. The markings are: Top square: Horizontal lines. Second square: Fully black. Third square: Diagonal lines. Bottom square: Fully white. Square next to black square: Dotted. Square next to diagonal square: Vertical lines. Which view of the folded cube is possible?

A view showing the Horizontal lines face and the Fully white face together.
A view showing the Fully black face, the Dotted face, and the Fully white face.
A view showing the Diagonal lines face, the Vertical lines face, and the Horizontal lines face. (Correct answer)
A view showing the Dotted face, the Vertical lines face, and the Fully black face.

Correct answer: A view showing the Diagonal lines face, the Vertical lines face, and the Horizontal lines face.

In this pattern, the 'Horizontal lines' face is opposite the 'Diagonal lines' face. The 'Fully black' face is opposite the 'Fully white' face. The 'Dotted' face is opposite the 'Vertical lines' face. We can eliminate any choice that shows opposite faces. Choice A is impossible (Black and White are opposites). Choice B is impossible (Horizontal and Diagonal are opposites, but this pattern makes them adjacent to White, so we must trace. If Black is front, Horizontal is top, Diagonal is bottom, White is back. So Horizontal and White are not adjacent). Let's re-evaluate. Let Black be front. Horizontal is top. Dotted is right. Diagonal is bottom. White is back. Vertical is left. Opposites: Horizontal/Diagonal, Black/White, Dotted/Vertical. Now check choices. A: Black, Dotted, White - Impossible (Black/White are opposites). B: Horizontal, White - Impossible (White is back, Horizontal is top). C: Dotted, Vertical, Black - Impossible (Dotted/Vertical are opposites). D: Diagonal, Vertical, Horizontal - This configuration is possible. If the corner shown is where the Diagonal (bottom), Vertical (left), and Horizontal (top) faces meet.

Question 31: The goal is to fold this pattern into a three-dimensional figure. One of the four answer options is the correct figure. In each set, there is only one accurate figure. The flat design is seen on the outside of the folded shape. Choose the three-dimensional shape created when the flat pattern is folded.

C) (Correct answer)
D)
B)
A)

Correct answer: C)

Mentally fold the flat pattern into a three-dimensional figure. Visualize how each face connects to its adjacent faces and how the edges align. Option C is the only figure that can be correctly formed from the given net, with all faces and their relative positions accurately represented after folding.

Question 32: Which quantum number determines the shape of an atomic orbital?

Angular momentum quantum number (l) (Correct answer)
Spin quantum number (mₛ)
Principal quantum number (n)
Magnetic quantum number (mₗ)

Correct answer: Angular momentum quantum number (l)

The angular momentum quantum number (l) defines orbital shape: l = 0 (s), l = 1 (p), l = 2 (d), l = 3 (f).

Question 33: How many moles of oxygen gas are required to completely combust 2 moles of propane (C3H8)?

5 mol
8 mol
10 mol (Correct answer)
3 mol

Correct answer: 10 mol

Balanced equation C3H8 + 5O2 → 3CO2 + 4H2O needs 5 mol O2 per mol propane, so 2 mol requires 10 mol.

Question 34: What is the relationship between (2R,3R) and (2S,3R) of the same molecule?

Identical
Constitutional isomers
Enantiomers
Diastereomers (Correct answer)

Correct answer: Diastereomers

They differ at one stereocenter but not all, so they are diastereomers.

Question 35: How many carbon atoms does each pyruvate molecule contain?

6
3 (Correct answer)
2
4

Correct answer: 3

Glucose (6 carbons) is split into two 3-carbon pyruvate molecules.

Question 36: Why might two answer choices show the same cube faces but still differ?

They are actually identical
One is two-dimensional
The orientation or rotation of a marking differs (Correct answer)
One has extra faces

Correct answer: The orientation or rotation of a marking differs

Distractors often keep faces correct but rotate a pattern the wrong way.

Question 37: Which enzyme is primarily responsible for synthesizing new DNA strands during prokaryotic replication?

DNA polymerase III (Correct answer)
DNA ligase
Helicase
RNA polymerase

Correct answer: DNA polymerase III

DNA polymerase III is the main replicative polymerase in prokaryotes, synthesizing new DNA strands in the 5' to 3' direction.

Question 38: A and B can complete a job in ten and twelve days, respectively. A begins working alone, and B joins him five days later to complete the task together. B has been on the job for how many days?

24/5
24/11
2
32/5
30/11 (Correct answer)

Correct answer: 30/11

First, determine the individual work rates: A completes 1/10 of the job per day, and B completes 1/12 of the job per day. A works alone for 5 days, completing 5 * (1/10) = 1/2 of the job. The remaining half of the job needs to be completed by A and B working together. Their combined work rate is 1/10 + 1/12 = 6/60 + 5/60 = 11/60 of the job per day. To find the time it takes them to complete the remaining 1/2 of the job, divide the remaining work by their combined rate: (1/2) / (11/60) = 30/11 days. Since B joins A for this duration, B works for 30/11 days.

Question 39: A young man works in a supermarket and earns $10.00 per hour for up to 40 hours. Then, if he works more than 40 hours, he will be paid $15.00 per hour for the extra time. How much will the young man be paid if he works 44 hours and 17 minutes?

$463.75
$444.25
$460.50
$464.25 (Correct answer)
$660.75

Correct answer: $464.25

First, calculate the regular pay for the initial 40 hours at $10 per hour, which is $400. Next, determine the overtime hours by subtracting 40 hours from the total 44 hours and 17 minutes, resulting in 4 hours and 17 minutes. Convert 17 minutes to a decimal fraction of an hour (17/60 ≈ 0.2833) and multiply the total overtime hours (4.2833) by the overtime rate of $15 per hour to get $64.25. Finally, add the regular pay and overtime pay to find the total earnings of $400 + $64.25 = $464.25.

Question 40: What is the role of transfer RNA (tRNA) during translation?

Carries genetic code from nucleus to ribosome
Unwinds the mRNA strand for reading
Catalyzes peptide bond formation
Delivers specific amino acids to the ribosome matching each codon (Correct answer)

Correct answer: Delivers specific amino acids to the ribosome matching each codon

Each tRNA molecule carries a specific amino acid and uses its anticodon to match the corresponding mRNA codon at the ribosome.

Question 41: A fair six-sided die is rolled three times. What is the probability of rolling a '4' on the first roll, an even number on the second roll, and a number greater than 2 on the third roll?

1/36
1/18 (Correct answer)
1/12
1/3

Correct answer: 1/18

These are three independent events, so their combined probability is the product of their individual probabilities. 1. Probability of rolling a '4' = 1/6. 2. Probability of rolling an even number ({2, 4, 6}) = 3/6 = 1/2. 3. Probability of rolling a number greater than 2 ({3, 4, 5, 6}) = 4/6 = 2/3. Multiply the probabilities together: (1/6) * (1/2) * (2/3) = 2/36 = 1/18.

Question 42: In a pattern folding question, the flat shape with attached tabs and faces is called the:

Projection
Net (Correct answer)
Aperture
Vertex

Correct answer: Net

A net is the unfolded 2D layout that folds into a 3D solid.

Question 43: The Heisenberg Uncertainty Principle states that:

The exact position and exact momentum of a particle cannot both be precisely known simultaneously (Correct answer)
Atomic orbitals are regions of zero electron probability
No two electrons in an atom can share all four quantum numbers
Electrons always occupy the lowest available energy level

Correct answer: The exact position and exact momentum of a particle cannot both be precisely known simultaneously

Heisenberg's Uncertainty Principle mathematically limits how precisely both position and momentum of a particle can be simultaneously determined (Δx · Δp ≥ ℏ/2).

Question 44: When unfolded, the punched holes are arranged symmetrically about what?

A random pattern
The center point only
The corners only
The fold lines (creases) (Correct answer)

Correct answer: The fold lines (creases)

Holes mirror across each fold line, producing symmetry about the creases.

Question 45: How many ways can 4 different books be arranged on a shelf?

256
16
24 (Correct answer)
12

Correct answer: 24

4! = 4 × 3 × 2 × 1 = 24 arrangements.

Question 46: If you fold a net and a marked face lands where a blank face should be, the answer is:

Correct
Incorrect (Correct answer)
Partially correct
Impossible to judge

Correct answer: Incorrect

A mark appearing on the wrong face means that solid does not match the net.

Question 47: How many molecules are in 2.0 mol of water?

3.01 × 10^23
1.2 × 10^23
6.02 × 10^23
1.2 × 10^24 (Correct answer)

Correct answer: 1.2 × 10^24

Multiplying 2.0 mol by Avogadro's number gives 1.2 × 10^24 molecules.

Question 48: During glycolysis, which molecule is the direct net product of substrate-level phosphorylation per glucose?

2 GTP
6 net ATP
2 net ATP (Correct answer)
4 net ATP

Correct answer: 2 net ATP

Glycolysis produces 4 ATP but consumes 2 in the investment phase, for a net of 2 ATP.

Question 49: The question prompt shows a three-dimensional object, while the response choices show outlines of five apertures or openings. To begin, visualize how the object appears from all angles (rather than form a single direction as shown). Then, choose one of the five highlighted apertures as the opening through which the object could pass directly if the correct side was inserted first.

E)
C) (Correct answer)
A)
D)
B)

Correct answer: C)

To find the correct aperture, mentally rotate the three-dimensional object to identify an orientation where its silhouette perfectly matches one of the provided two-dimensional openings. Option C represents a specific cross-section or profile of the object that allows it to pass directly through the aperture without obstruction.

Question 50: The cytosol's typical pH is at 7.2. The majority of enzymes in the lysosome, on the other hand, are only active at pH 5. This implies that

enzymes in the lysosome are released to the cytosol
protons are actively pumped into the lysosome (Correct answer)
enzymes in the lysosome are released to the cytosol
most enzymes in the lysosome are incapable of catalyzing substrates inside the lysosome

Correct answer: protons are actively pumped into the lysosome

Lysosomes are acidic organelles, with a typical pH of around 5, which is significantly lower than the cytosol's pH of 7.2. This acidic environment is crucial for the optimal activity of lysosomal enzymes, which are hydrolytic enzymes designed to break down waste materials. To maintain this low pH, protons (H+ ions) are actively pumped into the lysosome from the cytosol, requiring energy. This ensures that the enzymes function efficiently within the lysosome and are largely inactive if they accidentally leak into the cytosol, preventing cellular damage.

Question 51: A coin is flipped 3 times. What is the probability of exactly two heads?

1/4
1/8
3/8 (Correct answer)
1/2

Correct answer: 3/8

Three of eight outcomes have exactly two heads, so 3/8.

Question 52: Which macromolecule serves as the primary structural component of cell membranes?

Proteins
Phospholipids (Correct answer)
Nucleic acids
Carbohydrates

Correct answer: Phospholipids

Phospholipids form the bilayer that makes up cell membranes.

Question 53: Multiple binding sites exist on __________ enzymes.

Competitive
Allosteric (Correct answer)
Regulatory
Non-competitive
Catalytic

Correct answer: Allosteric

Allosteric enzymes possess multiple binding sites: an active site where the substrate binds, and one or more allosteric sites where regulatory molecules (allosteric effectors) bind. The binding of an effector to an allosteric site induces a conformational change in the enzyme, which can either activate or inhibit the enzyme's activity at the active site. This mechanism allows for sophisticated regulation of metabolic pathways.

Question 54: What is the maximum number of electrons that can occupy the third principal energy level (n = 3)?

32
6
18 (Correct answer)
8

Correct answer: 18

The maximum number of electrons in principal energy level n is given by 2n², so for n = 3: 2(3²) = 18 electrons.

Question 55: A hexagonal prism net has two hexagons and several rectangles. The two hexagons fold to become:

A single face
Adjacent side faces
The front and back rectangles
The opposite top and bottom faces (Correct answer)

Correct answer: The opposite top and bottom faces

The two hexagons form the parallel top and bottom of the prism.

Question 56: Enzymes increase reaction rates primarily by doing what?

Lowering activation energy (Correct answer)
Changing equilibrium
Increasing temperature
Adding reactants

Correct answer: Lowering activation energy

Enzymes are catalysts that lower the activation energy of reactions.

Question 57: At 25°C, the sum of pH and pOH for any aqueous solution equals:

10
1
7
14 (Correct answer)

Correct answer: 14

At 25°C, Kw = [H⁺][OH⁻] = 1 × 10⁻¹⁴, therefore pH + pOH = 14.

Question 58: Consider the image below, which was created by cementing together cubes of the same size. Each group was painted on all sides except the bottom on which it rests after it was cemented. Although not all cubes in the illustration are visible, the only ones that are hidden are those that are required to support other cubes. How many of the cubes in the image have only one side painted?

1 cube
3 cubes
5 cubes
4 cubes (Correct answer)
2 cubes

Correct answer: 4 cubes

Carefully examine the image of the cube structure. Cubes with only one side painted are those that are on an exposed face of the overall structure but are not on an edge or corner. By counting these specific cubes in the given image, four cubes fit this description, as they are surrounded by other cubes on all but one exposed face.

Question 59: A standard dihybrid cross (AaBb × AaBb) produces which classic phenotypic ratio?

3:1
1:1:1:1
1:2:1
9:3:3:1 (Correct answer)

Correct answer: 9:3:3:1

The dihybrid cross produces a 9:3:3:1 phenotypic ratio when both genes show complete dominance and independent assortment.

Question 60: Human skin color is determined by multiple genes contributing to a continuous range of phenotypes — this is an example of:

Codominance
Epistasis
Pleiotropy
Polygenic inheritance (Correct answer)

Correct answer: Polygenic inheritance

Polygenic inheritance involves multiple genes each contributing to a trait, producing a continuous bell-curve distribution of phenotypes in a population.

Question 61: What is the perimeter of a trapezoid with a surface area of 100?

45
55
35 (Correct answer)
25
65

Correct answer: 35

The perimeter of a trapezoid cannot be uniquely determined from its surface area alone without additional information about its specific dimensions or angles. However, if specific dimensions for the trapezoid were provided (e.g., through a diagram or additional constraints), such as bases and heights that result in an area of 100 and side lengths that sum to 35, then the perimeter would be 35. This implies a particular set of dimensions was either given or implicitly assumed for the problem.

Question 62: A dental study group consists of 5 first-year students and 4 second-year students. If a committee of 4 students is selected at random, what is the probability that the committee will consist of exactly 2 first-year students and 2 second-year students?

5/14
25/126
1/2
10/21 (Correct answer)

Correct answer: 10/21

First, calculate the total number of ways to choose a committee of 4 from the 9 students using combinations: C(9,4) = 9! / (4! * 5!) = (9*8*7*6)/(4*3*2*1) = 126 total possible committees. Next, calculate the number of ways to choose 2 first-year students from 5: C(5,2) = 5! / (2! * 3!) = 10. Then, calculate the number of ways to choose 2 second-year students from 4: C(4,2) = 4! / (2! * 2!) = 6. The number of ways to form the specific committee is the product of these two results: 10 * 6 = 60 favorable outcomes. The probability is the ratio of favorable outcomes to total outcomes: 60/126, which simplifies to 10/21.

Question 63: A compound is found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen by mass. If the molar mass of the compound is approximately 180 g/mol, what is its molecular formula?

C2H4O2
CH2O
C3H6O3
C6H12O6 (Correct answer)

Correct answer: C6H12O6

First, assume a 100g sample, which gives 40.0g C, 6.7g H, and 53.3g O. Convert these masses to moles: C (40.0g / 12.01 g/mol ≈ 3.33 mol), H (6.7g / 1.01 g/mol ≈ 6.63 mol), O (53.3g / 16.00 g/mol ≈ 3.33 mol). Divide by the smallest number of moles (3.33) to get the empirical formula CH2O. The molar mass of the empirical formula (CH2O) is about 30 g/mol. To find the molecular formula, divide the given molar mass by the empirical formula mass (180 g/mol / 30 g/mol = 6). Multiply the subscripts in the empirical formula by this factor (6) to get C6H12O6.

Question 64: Due to construction, Richard drives on I-75 at 65 miles per hour for 24 minutes, then drops to 55 miles per hour for 30 minutes. In 54 minutes, how far did Richard travel?

60
53.5 (Correct answer)
58.5
50.5
55.5

Correct answer: 53.5

To find the total distance, calculate the distance traveled during each segment of the journey. First, convert the time for each segment from minutes to hours (24 minutes = 0.4 hours, 30 minutes = 0.5 hours). Then, multiply the speed by the time for each segment: 65 mph * 0.4 hours = 26 miles, and 55 mph * 0.5 hours = 27.5 miles. Finally, add these two distances together to get the total distance traveled: 26 + 27.5 = 53.5 miles.

Question 65: A 50:50 mixture of two enantiomers is known as what?

A racemic mixture (Correct answer)
An optically active solution
A diastereomeric mixture
A constitutional isomer

Correct answer: A racemic mixture

A racemic mixture, or racemate, is a 50:50 mixture of two enantiomers. Because the two enantiomers rotate plane-polarized light equally but in opposite directions, their effects cancel out, and the racemic mixture is optically inactive.

Question 66: Which subatomic particle determines the identity of a chemical element?

Electron
Proton (Correct answer)
Neutron
Positron

Correct answer: Proton

The number of protons (atomic number) defines the element.

Question 67: The points (4,3) and (3,2) are on line A in the xy-plane. Line A is parallel to which of the following equations of lines?

𝑦=𝑥/2
𝑦=𝑥 (Correct answer)
𝑦=3𝑥
𝑦=2𝑥
𝑦=10

Correct answer: 𝑦=𝑥

First, calculate the slope of Line A using the points (4,3) and (3,2). The slope (m) is (y2 - y1) / (x2 - x1) = (2 - 3) / (3 - 4) = -1 / -1 = 1. Parallel lines have the same slope. Among the given options, the equation y = x has a slope of 1. Therefore, Line A is parallel to y = x.

Question 68: The best time-saving habit on pattern folding questions is to:

Eliminate choices using one clearly wrong face (Correct answer)
Guess immediately
Count edges on each answer
Fully reconstruct every option

Correct answer: Eliminate choices using one clearly wrong face

Spotting a single contradictory face lets you discard a choice without full reconstruction.

Question 69: The prefix 'thio-' in organic nomenclature indicates replacement of oxygen with:

Phosphorus
A halogen
Sulfur (Correct answer)
Nitrogen

Correct answer: Sulfur

The 'thio-' prefix indicates that sulfur replaces oxygen, as in thiol (-SH) being the sulfur analogue of alcohol (-OH).

Question 70: What is the origin of turmeric, according to the text?

eastern Himalayas
middle east
Sri Lanka
India (Correct answer)
southern Asia

Correct answer: India

This question refers to a passage about Alzheimer's disease that was not provided. Without the relevant text, it is impossible to determine what happens when nerve cells are degraded by Alzheimer's disease according to that specific passage. Assuming the provided correct answer, 'more than one of the above' implies that the missing text lists multiple consequences from the options (formation of beta-amyloid plaques, inflammation, oxidative damage, metal toxicity).

Question 71: Which of the following statements is FALSE?

Studies indicate curcumin is a potent inhibitor of pro-inflammatory cytokines
Studies have not found any evidence regarding the toxicity of copper on neurons. (Correct answer)
Studies indicate metals can cause A-beta accumulation and toxicity.
Studies show that copper and zinc bind A-beta inducing aggregation and give rise to ROS.
Cliquinol has shown anti-Alzheimer’s effects.

Correct answer: Studies have not found any evidence regarding the toxicity of copper on neurons.

This question refers to a passage that was not provided. Without the relevant text, it is impossible to verify the truthfulness of these statements. Assuming the provided correct answer, 'Both statements are true' indicates that the missing passage would confirm that TNF-alpha and IL-1 beta are pro-inflammatory cytokines and that their activation is inhibited by the reduction of Reactive Oxygen Species (ROS).

Question 72: How many electrons can the second principal energy level (n=2) hold?

8 (Correct answer)
2
32
18

Correct answer: 8

The n=2 level has s and p subshells holding a maximum of 8 electrons.

Question 73: During meiosis, genetic diversity is increased by crossing over during which phase?

Anaphase II
Prophase I (Correct answer)
Telophase I
Metaphase II

Correct answer: Prophase I

Homologous chromosomes exchange segments during prophase I.

Question 74: Iron has atomic number 26. In which period and group of the periodic table does it appear?

Group 6, Period 4
Group 8, Period 4 (Correct answer)
Group 6, Period 3
Group 8, Period 3

Correct answer: Group 8, Period 4

Iron (Z = 26) has configuration [Ar]3d⁶4s², placing it in Period 4 and Group 8 as a d-block (transition) element.

Question 75: A point mutation that substitutes one nucleotide and causes a different amino acid to be incorporated into the protein is called a:

Nonsense mutation
Silent mutation
Frameshift mutation
Missense mutation (Correct answer)

Correct answer: Missense mutation

A missense mutation changes one codon so that it codes for a different amino acid, potentially altering protein structure and function.

Question 76: What is one of the key molecular pathways that leads to Alzheimer's disease?

cytokines
toxicity of kidneys
microgliosis
inflammation of nerve cells (Correct answer)
astrocytosis

Correct answer: inflammation of nerve cells

This question refers to a passage about Curcumin that was not provided. Without the relevant text, it is impossible to verify the truthfulness of these statements. Assuming the provided correct answer, 'Both statements are true' indicates that the missing passage would confirm that prolonged curcumin use can cause liver cell damage and that caution is advised for alcoholic patients when using curcumin for Alzheimer's treatment.

Question 77: On the DAT, there is no penalty for guessing, which means you should:

Skip the last passage
Only answer questions you are certain about
Leave hard questions blank
Answer every question even if unsure (Correct answer)

Correct answer: Answer every question even if unsure

Without a guessing penalty, leaving blanks only loses potential points.

Question 78: The de Broglie hypothesis proposes that:

Electrons are stationary particles orbiting the nucleus
Only photons exhibit wave-particle duality
All matter exhibits wave-like properties with wavelength λ = h/mv (Correct answer)
Energy and matter are interchangeable forms of the same entity

Correct answer: All matter exhibits wave-like properties with wavelength λ = h/mv

de Broglie proposed that all matter has an associated wavelength λ = h/mv, extending wave-particle duality beyond photons to all particles.

Question 79: How many moles of ions are produced when 1 mol of Na2SO4 fully dissolves?

3 mol (Correct answer)
1 mol
4 mol
2 mol

Correct answer: 3 mol

Na2SO4 dissociates into 2 Na+ and 1 SO4^2-, totaling 3 mol of ions.

Question 80: The passage suggests that a cold-adapted enzyme from a psychrophile would most likely:

lose its catalytic function if heated to 50 °C. (Correct answer)
be highly effective in a high-pressure, deep-sea environment.
have more rigid and stable protein structures than its mesophilic counterpart.
function optimally in the human body (approximately 37 °C).

Correct answer: lose its catalytic function if heated to 50 °C.

Paragraph 2 describes the 'thermolability trade-off,' stating that the flexibility that allows psychrophilic enzymes to work in the cold 'makes them more susceptible to denaturation at even moderate temperatures.' Since 50 °C is a moderate temperature where a mesophilic enzyme might be stable, the less stable psychrophilic enzyme would likely denature and lose its function.

Question 81: For a triangular prism, the net has two triangles and three rectangles; the triangles end up:

Merged with a rectangle
On adjacent sides
At the two opposite ends as parallel faces (Correct answer)
Inside the solid

Correct answer: At the two opposite ends as parallel faces

The two triangles become the parallel end faces of the prism.

Question 82: Solve the equation: 1/6 + 3/8 - 5/12 =

5/24
23/24
1/192
-1/8
1/8 (Correct answer)

Correct answer: 1/8

To solve the expression 1/6 + 3/8 - 5/12, find the least common denominator (LCD) for 6, 8, and 12, which is 24. Convert each fraction: 1/6 becomes 4/24, 3/8 becomes 9/24, and 5/12 becomes 10/24. Now, perform the addition and subtraction: 4/24 + 9/24 - 10/24 = (4 + 9 - 10)/24 = 3/24. Finally, simplify the fraction: 3/24 reduces to 1/8.

Question 83: An allosteric activator of PFK-1 that signals low cellular energy is:

ATP
AMP (Correct answer)
Citrate
NADH

Correct answer: AMP

High AMP indicates low energy charge and stimulates PFK-1 to increase ATP production.

Question 84: What is the oxidation state of sulfur in sulfuric acid (H2SO4)?

+2
-2
+6 (Correct answer)
+4

Correct answer: +6

With H at +1 and O at -2, sulfur must be +6 to balance the neutral molecule.

Question 85: Curcumin has a number of remedial quality, but which one isn't listed?

Detoxifying
Anti-cancer
Anti-inflammation
Anti-septic
None of the above (Correct answer)

Correct answer: None of the above

This question refers to a passage about Curcumin that was not provided. Without the relevant text, it is impossible to determine which remedial qualities of Curcumin are listed or not listed within that specific passage. Assuming the provided correct answer, 'None of the above' implies that all the other listed qualities (Anti-cancer, Anti-inflammation, Detoxifying, Anti-septic) *are* mentioned in the missing text.

Question 86: According to Lewis acid-base theory, a Lewis acid is an electron pair:

Proton donor
Donor
Acceptor (Correct answer)
Proton acceptor

Correct answer: Acceptor

A Lewis acid accepts an electron pair from a Lewis base to form a coordinate covalent bond.

Question 87: Transitional words like 'however' and 'in contrast' signal that the author is:

Repeating the prior point
Listing examples in order
Concluding the passage
Introducing a contrasting or opposing idea (Correct answer)

Correct answer: Introducing a contrasting or opposing idea

Contrast transitions indicate a shift to an opposing or differing idea.

Question 88: Which functional group characterizes an alcohol?

Carboxyl (-COOH)
Carbonyl (C=O)
Hydroxyl (-OH) (Correct answer)
Amino (-NH2)

Correct answer: Hydroxyl (-OH)

Alcohols contain a hydroxyl group bonded to a carbon.

Question 89: What is the probability that Marvin will flip a two-sided coin three times in a row on heads?

1/8 (Correct answer)
1/16
1/6
1/4
1/2

Correct answer: 1/8

Each flip of a fair two-sided coin is an independent event with a 1/2 probability of landing on heads. To find the probability of flipping heads three times in a row, you multiply the probability of getting heads on each individual flip. Therefore, (1/2) * (1/2) * (1/2) equals 1/8.

Question 90: A signal phrase like 'in contrast' indicates the author is about to:

Present an opposing or differing idea (Correct answer)
Summarize the conclusion
Define a technical term
Repeat the previous point

Correct answer: Present an opposing or differing idea

'In contrast' signals a shift to a contrasting idea.

Question 91: Solve (2.004)²

4.016016 (Correct answer)
4.001616
4.00176
4.000176
4.16016

Correct answer: 4.016016

To solve (2.004)², you multiply 2.004 by itself. This can be done directly or by recognizing it as (2 + 0.004)². Using the distributive property or the formula (a+b)² = a² + 2ab + b², we get 2² + 2(2)(0.004) + (0.004)² = 4 + 0.016 + 0.000016. Adding these values together yields 4.016016.

Question 92: When two answer cubes show identical visible faces, the deciding factor is often the:

Hidden relationship implied by mark positions (Correct answer)
Size of the image
Number of cubes shown
Order of the choices

Correct answer: Hidden relationship implied by mark positions

Mark placement reveals adjacency relationships that distinguish otherwise similar cubes.

Question 93: Which of the following facts concerning Alzheimer's illness is false?

Six percent of women above the age of sixty are affected by Alzheimer’s disease.
The prevalence of dementia in India is around 33.6% in every one thousand people.
Around thirty years from now, about 18 million people will be affected by Alzheimer’s in the United States.
AD affects roughly four and a half million people in the United States today.
Every year in the United States more than $100 million is spent on healthcare to treat AD. (Correct answer)

Correct answer: Every year in the United States more than $100 million is spent on healthcare to treat AD.

Healthcare costs for Alzheimer's disease in the United States are significantly higher than $100 million annually, typically ranging in the hundreds of billions of dollars. Therefore, the statement that 'more than $100 million is spent on healthcare to treat AD' is a gross understatement and factually incorrect. The other statements represent plausible statistics or projections related to Alzheimer's disease.

Question 94: Which of the following is a key difference between glycolysis and gluconeogenesis?

Both pathways use the exact same enzymes but in reverse directions.
Glycolysis produces ATP, while gluconeogenesis consumes ATP. (Correct answer)
Glycolysis occurs in the cytoplasm, while gluconeogenesis occurs in the mitochondria.
Glycolysis is an anabolic process, while gluconeogenesis is a catabolic process.

Correct answer: Glycolysis produces ATP, while gluconeogenesis consumes ATP.

Glycolysis is a catabolic pathway that breaks down glucose, resulting in a net production of ATP. Gluconeogenesis is an anabolic pathway that synthesizes glucose, requiring the input of energy in the form of ATP and GTP. While many steps are reversible, key irreversible steps in glycolysis are bypassed by different enzymes in gluconeogenesis. Both pathways occur primarily in the cytoplasm, with some reactions of gluconeogenesis starting in the mitochondria.

Question 95: A bag has 4 red and 6 blue marbles. What is the probability of drawing a red marble?

1/2
2/5 (Correct answer)
4/6
3/5

Correct answer: 2/5

There are 4 red out of 10 total, so 4/10 = 2/5.

Question 96: Anton shoots freethrows at a 3:2 ratio for made to missed attempts. How many free throws did he make if he missed 150 shots?

300
450
150
320
225 (Correct answer)

Correct answer: 225

The ratio of made to missed free throws is given as 3:2. This means for every 2 shots Anton misses, he makes 3 shots. Since he missed 150 shots, we can set up a proportion: (made shots / missed shots) = 3/2. Plugging in the number of missed shots, we get (made shots / 150) = 3/2. Solving for made shots, we multiply 150 by 3/2, which results in 225 made shots.

Question 97: To verify a candidate answer quickly, you should check:

The total number of answer choices
The color of the background
Only one face
That three mutually adjacent faces match the net (Correct answer)

Correct answer: That three mutually adjacent faces match the net

Confirming three faces meeting at a corner is usually enough to confirm or reject a solid.

Question 98: The reaction quotient (Q) for a reaction involving nitrogen monoxide within a sealed flask was determined to be 1.1 × 10² at one point. Which reaction is most likely taking place in the flask if the amount of NO gas in the flask increased after this point?

2NO(g) + 2H2(g) ↔ N2(g) + 2H2O(g) Kc = 4.0 × 106
2NOCl(g) ↔ 2NO(g) + Cl2(g) Kc = 1.6 × 10-5
NOBr(g) ↔ NO(g) + ½Br2(g) Kc = 3.4 × 10-2
N2(g) + O2(g) ↔ 2NO(g) Kc = 4.2 × 102 (Correct answer)

Correct answer: N2(g) + O2(g) ↔ 2NO(g) Kc = 4.2 × 102

The reaction quotient (Q) compares the relative amounts of products and reactants present in a reaction at any given time to the equilibrium constant (Kc). If Q < Kc, the reaction will proceed in the forward direction (towards products) to reach equilibrium. The problem states that the amount of NO gas increased, meaning the reaction shifted to the right (towards products). For this to happen, Q must be less than Kc. Option A has Q (1.1 × 10²) < Kc (4.2 × 10²), indicating a shift to the right, which would increase NO.

Question 99: If 25 g of a reactant reacts but only 20 g of product forms versus a 25 g theoretical yield, what limits efficiency?

The limiting reagent was in excess
The percent yield is 80% (Correct answer)
The molar mass is wrong
The reaction violates conservation of mass

Correct answer: The percent yield is 80%

Actual 20 g over theoretical 25 g gives an 80% percent yield.

Question 100: A standard deck has 52 cards. What is the probability of drawing a king?

1/13 (Correct answer)
1/26
1/52
1/4

Correct answer: 1/13

There are 4 kings, so 4/52 = 1/13.

Question 101: What is the hybridization of the carbon atom in carbon dioxide (CO2)?

sp3
sp3d
sp (Correct answer)
sp2

Correct answer: sp

CO2 is linear with two regions of electron density, giving sp hybridization.

Question 102: How many grams of NaOH are needed to make 500 mL of a 2.0 M solution (NaOH=40)?

40 g (Correct answer)
20 g
10 g
80 g

Correct answer: 40 g

0.5 L × 2.0 mol/L = 1.0 mol NaOH, which is 40 g.

Question 103: Genes that are physically located on the same chromosome are described as:

Pleiotropic
Codominant
Linked (Correct answer)
Epistatic

Correct answer: Linked

Linked genes reside on the same chromosome and tend to be inherited together unless separated by crossing over during meiosis.

Question 104: Select the appropriate TOP VIEW.

D) (Correct answer)
C)
B)
A)

Correct answer: D)

To determine the correct top view, imagine looking directly down onto the three-dimensional object. The top view should accurately represent the shape and arrangement of all visible surfaces and edges when observed from above. Option D correctly depicts the outline and internal features visible from this overhead perspective.

Question 105: A compound containing the -NH₂ functional group is classified as:

An ester
An alcohol
A ketone
An amine (Correct answer)

Correct answer: An amine

The -NH₂ (amino) group is the defining functional group of primary amines.

Question 106: Twenty boxes, each weighing 500 kg, were placed into a wagon. How much extra weight can be loaded if the wagon's maximum weight limit is 20 tons? (A ton is equal to 907 kg)

814.0 kg
8,140 kg (Correct answer)
81,400 kg
8.140 kg
81.40 kg

Correct answer: 8,140 kg

First, calculate the total weight of the 20 boxes: 20 boxes * 500 kg/box = 10,000 kg. Next, convert the wagon's maximum weight limit from tons to kilograms using the given conversion factor (1 ton = 907 kg): 20 tons * 907 kg/ton = 18,140 kg. Finally, subtract the current weight from the maximum limit to find the extra weight that can be loaded: 18,140 kg - 10,000 kg = 8,140 kg.

Question 107: Which compound is a Lewis acid but NOT a Brønsted-Lowry acid?

CH₃COOH
H₂SO₄
BF₃ (Correct answer)
HCl

Correct answer: BF₃

BF₃ accepts electron pairs (Lewis acid) but has no proton to donate, so it cannot be a Brønsted-Lowry acid.

Question 108: Which of the following, based on the passage, is related to anorexia nervosa statistics? I. It affects 70 million people all around the world. II. It affects about one percent of girls and young women. III. Boys and young men now account for more than a third of the victims. [1) Eating disorders impact 24 million people in the United States and 70 million worldwide. These disorders go beyond normal dieting and involve extreme behavior related to food or exercise, such as starvation and binge eating. In the past few decades, eating disorders have become a major health crisis and can lead to serious com plications or even fatalities if left untreated. [2) Anorexia nervosa is one of the most well—known eating disorders and is also one of the deadliest. People with this disease, known as anorexics, have an intense fear of gaining weight. They develop a distorted body image which prevents them from correctly evaluating their body size and shape. Anorexics believe they are overweight even when they are normal weight or even grossly underweight. When they look in the mirror, the image they see is not a true reflection of their appearance. As a result, they go to extreme lengths to lose pounds and typically starve themselves, until they become thinner and thinner. Many drop so much weight they develop a malnourished, emaciated appearance. Anorexics are often perfectionists who feel the disorder helps them gain control over their lives, when in fact, just the opposite occurs. [3) Most people who develop anorexia nervosa are young and female. About 1 out of 100 girls and women currently suffer from it. In the past, few young men and older adults got this disease. However, those numbers have been increasing. This is particularly true for male athletes or young men in the military, who feel driven to be thin and in shape. Males now make up 25% of all sufferers. Anorexia also used to be more common among European Americans, but that’s changing too. Occurrences are rapidly rising among other ethnic groups. What Are the Causes? (4) There is no specific cause of anorexia nervosa. Like other eating disorders, it is a mental illness that arises from a combination of circumstances. Biological, emotional, and psychological factors work together to bring about this disease. While anorexia involves a preoccupation with food, the underlying issues are about much more than that. People with eating disorders use food and exercise to cope with painful emotions or situations in other areas of their lives. [5) Many different factors can contribute to the disorder. Anorexia nervosa often runs in families and current research suggests there could be a genetic link. Feelings of low self—esteem and inadequacy are also two big contributors to this disease. A lack of control over one‘s life and a history of substance abuse can play a part as well. Other psychological factors include depression, anxiety and obsessive compulsive disorder. Many sufferers are perfectionists who feel the need to control every aspect of their lives. [6) Social causes, such as troubled ties with family members or friends, are often to blame as well. They also include pressures from society to look thin and attractive. Success and self-worth are often equated with a slender appearance. Other social causes include a history of being teased by peers because of body size. (7) There are several risk factors associated with anorexia. They include an early onset of puberty, participation in sports or other activities that place a premium on having a lean body, difficulty dealing with stress, regular dieting, and a history of physical or sexual abuse. Risk factors are not a guarantee that a person will become anorexic. Some young women who attend ballet classes and have problems with stress, for example, are more likely to get anorexia. However, others with the same risk factors cope just fine. Risk factors can play a part, but they don’t always lead to anorexia. [8} Researchers are still learning about all the underlying issues that can contribute to anorexia nervosa. For example, they‘re studying possible biochemical causes. Some researchers are studying the possible effects of serotonin, a brain chemical that regulates mood and appetite. Serotonin levels have been found to be out of balance in a percentage of individuals with anorexia or other eating disorders. What Are the Symptoms? [9} Most people with anorexia nervosa see themselves as overweight when they are actually underweight. They are obsessed with dropping pounds and do everything they can to lose weight. As a result, they often engage in purging behavior, which can include self-induced vomiting, along with a use of laxatives, diuretics, and/or enem as. [10} This can lead to a variety of short—term side effects and long—term com plications. Some of the short—term symptoms include brittle nails and hair, cold or swollen hands and feet, constipation, dry skin with a yellowish cast, lethargy, and a lack of menstruation. Other side effects can last for a longer period of time and be harder to overcome. Without treatment, anorexics could suffer from malnutrition, heart problems, bone disease and other dangerous com plications. Some of these effects continue to take a physical toll long after the disease has been treated and cured. Unfortunately, death is another com plication of anorexia and about 20% of the people with this disorder die prematurely. The side effects that most commonly prove fatal include fluid imbalances and cardiac arrest. Suicide is another com plication often linked to the disease. How Is It Diagnosed? [11) There are two types of anorexia nervosa physicians consider when making a diagnosis. Patients who suffer from the binging/purging type regularly engage in binging behavior, or eating a lot of food in a short period of time, that is soon followed by purging. Patients who suffer from the restricting type of anorexia do not engage in binging and purging, but instead continually deny their bodies the nutrients they need. To determine if a person has either type, doctors question patients about eating habits and behaviors. They also perform exams, take x—rays and other scans and do blood and urine tests. Most importantly, they consult a medical handbook, known as the Diagnostic and Statistical Manual of Mental Disorders, which has a list of criteria for each eating disorder. Even if a patient does not meet all the criteria, a doctor may be concerned enough to begin a course of treatment. [12) Another method that can determine if a person has anorexia nervosa is to measure the patient‘s BMI, or body mass index. This is the answer to a mathematical formula that factors in weight and height. For example, if you weigh 135 lbs. and stand 63 inches tall your BMI is 24. For an individual who is at a normal weight, BMI typically measures between 18.5 and 24.9. If it drops below that, a person is considered underweight and could have anorexia or other another eating disorder. How Is It Treated? [13) According to the National Eating Disorders Association, only one third of the people with anorexia receive the treatment they need. In general, the most important aspect of curing the disease is stopping starvation and returning the patient to a healthy appearance. Treating anorexia nervosa involves three major steps. The first involves restoring the patient to a healthy weight. To do this, anorexics often must be hospitalized, particularly if their weight has become dangerously low. Since malnutrition and a low body weight can impede a person‘s ability to think clearly, anorexics also need to gain weight to move on to the next phases of their treatment. [14) During the second step, doctors treat the psychological issues that led to the disorder. This can involve one or more forms of therapy. Cognitive therapy is a form of treatment that focuses on how a person thinks and feels. This part of the treatment process helps anorexics change how they see themselves and adjust distorted body images. The purpose of behavioral therapy is to alter the self—destructive behaviors of anorexia, including starvation and purging. During sessions, the patient may list alternatives to those behaviors or ways to avoid them. During interpersonal therapy, the doctor addresses the patient‘s relationships with others. He or she may discuss unhealthy or harmful relationships while suggesting coping strategies. [15) In the third step, patients learn healthy behaviors related to eating and exercise. This involves another type of treatment known as nutritional therapy. Patients learn about the importance of eating a balanced diet and exercising in a healthy way. The use of medications can also be a part of a patient’s treatment plan and help adjust symptoms related to mood and anxiety. One or more of the following may be prescribed: antidepressants, antipsychotics, mood stabilizers, hormones to restore menstrual cycle, and dietary supplements. However, some studies suggest medications won‘t prevent an anorexic from relapsing. [16) Unfortunately, there is no entirely effective treatment for anorexia and recovery could last years. Even after gaining weight, anorexics may remain thinner than average. Often, they display healthy behavior toward food for months at a time then suddenly relapse. Involving family members and friends can help with the adjustment and be a big advantage in the recovery process. However, long—term studies suggest that about half of all patients never fully recover. [17) Eating disorders don’t only impact the people who suffer from them. They also have a profound impact on friends and family members. For them, it can often feel as though the patient‘s relationship with his or her eating disorder takes precedence over all other relationships. Parents and siblings of an anorexic often spend a great deal of time and energy worrying about him or her, or cajoling the person to seek help or change the behavior. As a result, living with someone who has an eating disorder can be a painful process, even during the road to recovery. Therefore, treatment plans often include counseling sessions for family members and close friends. This can go a long way toward repairing damaged relationships. [18) For average anorexics, the disease lasts less than two years, which is a shorter time period than other eating disorders. It is unclear, however, what could attribute to this fact. Anecdotal evidence suggests anorexics may be reluctant to participate in research studies, which could skew the results. Can It Be Prevented? [19) The best way to prevent anorexia nervosa is to develop healthy attitudes toward food and exercise at a young age. Parents in particular can encourage and reinforce this type of behavior in a number of ways. Talk to your child about social pressures to be thin, set a good example with your own eating habits, and accept and support your child in all facets of life. Pediatricians can also help identify anorexia nervosa early. They can inquire about eating habits and check for weight fluctuations, for example. Identifying a disorder early can go a long way toward preventing com plications and speeding the recovery process. [20) However, there is no sure way to prevent this kind of disorder. Outside pressures from peers or cultural influences often have as much of an impact as experiences in the home. Therefore, it is important for parents to keep an eye on their kids, watch how they eat and observe their attitudes toward food and their bodies, to ensure they remain healthy and happy. [21) If you are concerned someone you know may have anorexia, there are steps you can take to help him or her. If you see the warning signs of an eating disorder in a friend or family member, don‘t think it‘s all in your head or try to brush the problem under a rug. It is very likely the person is in denial about the disease, and if you don't approach him or her the situation could become worse. Although it can be difficult to bring up such a delicate subject, talking about it can only help and is the first step toward a positive outcome. [22) Even if the person gets angry or defensive, don‘t give up. Try to approach him or her at a later time when you've both had a chance to calm down and regroup. It could take several attempts before he or she is ready to listen. Also, anorexics often deny their behavior and at times don‘t even realize they have a disease. Remember that pushing, lecturing or blaming won‘t help. Always make it clear you’re only concerned about the person and have his or her best interests at heart. The best thing you can do for a person with anorexia nervosa is to encourage him or her to seek professional help. Eating disorders are mental illnesses that won‘t go away on their own. They must be appropriately diagnosed and properly treated.

II only (Correct answer)
III only
II and III only
I and II only
I only

Correct answer: II only

According to paragraph 1, 'Eating disorders impact ... 70 million worldwide,' referring to all eating disorders, not just anorexia nervosa, making statement I false. Paragraph 3 states, 'About 1 out of 100 girls and women currently suffer from it,' which is 1%, making statement II true. Paragraph 3 also states, 'Males now make up 25% of all sufferers,' which is one-fourth, not more than a third, making statement III false. Therefore, only statement II is related to anorexia nervosa statistics as described in the passage.

Question 109: What are the coordinates of point B when point A(10,3) is reflected over the y-axis to get point B?

(−10,3) (Correct answer)
(−10,−3)
(10,3)
(0,3)
(10,−3)

Correct answer: (−10,3)

When a point is reflected over the y-axis, its x-coordinate changes sign while its y-coordinate remains the same. For point A(10,3), reflecting it over the y-axis means the x-coordinate of 10 becomes -10, while the y-coordinate of 3 stays the same. Therefore, the coordinates of point B are (-10,3).

Question 110: If a passage presents a cause-and-effect relationship, a likely question will test whether you can:

Recall the publication date
Name the author's university
Identify what causes a described outcome (Correct answer)
Count the number of sentences

Correct answer: Identify what causes a described outcome

Cause-effect passages often test identification of causes and their results.

Question 111: In N2 + 3H2 → 2NH3, how many liters of NH3 form from 6 L of H2 at constant T and P?

2 L
6 L
9 L
4 L (Correct answer)

Correct answer: 4 L

Gas volume ratio of H2 to NH3 is 3:2, so 6 L H2 gives 4 L NH3.

Question 112: A monohybrid cross between two heterozygotes (Aa × Aa) produces offspring in what phenotypic ratio?

3:1 (Correct answer)
1:1
4:0
1:2:1

Correct answer: 3:1

A monohybrid cross between two heterozygotes yields a 3:1 phenotypic ratio (3 dominant : 1 recessive).

Question 113: How many three-digit codes can be made using digits 0–9 if repetition is allowed?

720
1000 (Correct answer)
900
999

Correct answer: 1000

10 × 10 × 10 = 1000 possible codes.

Question 114: Which of the following statements does the author most likely agree with based on the passage? [1) Eating disorders impact 24 million people in the United States and 70 million worldwide. These disorders go beyond normal dieting and involve extreme behavior related to food or exercise, such as starvation and binge eating. In the past few decades, eating disorders have become a major health crisis and can lead to serious com plications or even fatalities if left untreated. [2) Anorexia nervosa is one of the most well—known eating disorders and is also one of the deadliest. People with this disease, known as anorexics, have an intense fear of gaining weight. They develop a distorted body image which prevents them from correctly evaluating their body size and shape. Anorexics believe they are overweight even when they are normal weight or even grossly underweight. When they look in the mirror, the image they see is not a true reflection of their appearance. As a result, they go to extreme lengths to lose pounds and typically starve themselves, until they become thinner and thinner. Many drop so much weight they develop a malnourished, emaciated appearance. Anorexics are often perfectionists who feel the disorder helps them gain control over their lives, when in fact, just the opposite occurs. [3) Most people who develop anorexia nervosa are young and female. About 1 out of 100 girls and women currently suffer from it. In the past, few young men and older adults got this disease. However, those numbers have been increasing. This is particularly true for male athletes or young men in the military, who feel driven to be thin and in shape. Males now make up 25% of all sufferers. Anorexia also used to be more common among European Americans, but that’s changing too. Occurrences are rapidly rising among other ethnic groups. What Are the Causes? (4) There is no specific cause of anorexia nervosa. Like other eating disorders, it is a mental illness that arises from a combination of circumstances. Biological, emotional, and psychological factors work together to bring about this disease. While anorexia involves a preoccupation with food, the underlying issues are about much more than that. People with eating disorders use food and exercise to cope with painful emotions or situations in other areas of their lives. [5) Many different factors can contribute to the disorder. Anorexia nervosa often runs in families and current research suggests there could be a genetic link. Feelings of low self—esteem and inadequacy are also two big contributors to this disease. A lack of control over one‘s life and a history of substance abuse can play a part as well. Other psychological factors include depression, anxiety and obsessive compulsive disorder. Many sufferers are perfectionists who feel the need to control every aspect of their lives. [6) Social causes, such as troubled ties with family members or friends, are often to blame as well. They also include pressures from society to look thin and attractive. Success and self-worth are often equated with a slender appearance. Other social causes include a history of being teased by peers because of body size. (7) There are several risk factors associated with anorexia. They include an early onset of puberty, participation in sports or other activities that place a premium on having a lean body, difficulty dealing with stress, regular dieting, and a history of physical or sexual abuse. Risk factors are not a guarantee that a person will become anorexic. Some young women who attend ballet classes and have problems with stress, for example, are more likely to get anorexia. However, others with the same risk factors cope just fine. Risk factors can play a part, but they don’t always lead to anorexia. [8} Researchers are still learning about all the underlying issues that can contribute to anorexia nervosa. For example, they‘re studying possible biochemical causes. Some researchers are studying the possible effects of serotonin, a brain chemical that regulates mood and appetite. Serotonin levels have been found to be out of balance in a percentage of individuals with anorexia or other eating disorders. What Are the Symptoms? [9} Most people with anorexia nervosa see themselves as overweight when they are actually underweight. They are obsessed with dropping pounds and do everything they can to lose weight. As a result, they often engage in purging behavior, which can include self-induced vomiting, along with a use of laxatives, diuretics, and/or enem as. [10} This can lead to a variety of short—term side effects and long—term com plications. Some of the short—term symptoms include brittle nails and hair, cold or swollen hands and feet, constipation, dry skin with a yellowish cast, lethargy, and a lack of menstruation. Other side effects can last for a longer period of time and be harder to overcome. Without treatment, anorexics could suffer from malnutrition, heart problems, bone disease and other dangerous com plications. Some of these effects continue to take a physical toll long after the disease has been treated and cured. Unfortunately, death is another com plication of anorexia and about 20% of the people with this disorder die prematurely. The side effects that most commonly prove fatal include fluid imbalances and cardiac arrest. Suicide is another com plication often linked to the disease. How Is It Diagnosed? [11) There are two types of anorexia nervosa physicians consider when making a diagnosis. Patients who suffer from the binging/purging type regularly engage in binging behavior, or eating a lot of food in a short period of time, that is soon followed by purging. Patients who suffer from the restricting type of anorexia do not engage in binging and purging, but instead continually deny their bodies the nutrients they need. To determine if a person has either type, doctors question patients about eating habits and behaviors. They also perform exams, take x—rays and other scans and do blood and urine tests. Most importantly, they consult a medical handbook, known as the Diagnostic and Statistical Manual of Mental Disorders, which has a list of criteria for each eating disorder. Even if a patient does not meet all the criteria, a doctor may be concerned enough to begin a course of treatment. [12) Another method that can determine if a person has anorexia nervosa is to measure the patient‘s BMI, or body mass index. This is the answer to a mathematical formula that factors in weight and height. For example, if you weigh 135 lbs. and stand 63 inches tall your BMI is 24. For an individual who is at a normal weight, BMI typically measures between 18.5 and 24.9. If it drops below that, a person is considered underweight and could have anorexia or other another eating disorder. How Is It Treated? [13) According to the National Eating Disorders Association, only one third of the people with anorexia receive the treatment they need. In general, the most important aspect of curing the disease is stopping starvation and returning the patient to a healthy appearance. Treating anorexia nervosa involves three major steps. The first involves restoring the patient to a healthy weight. To do this, anorexics often must be hospitalized, particularly if their weight has become dangerously low. Since malnutrition and a low body weight can impede a person‘s ability to think clearly, anorexics also need to gain weight to move on to the next phases of their treatment. [14) During the second step, doctors treat the psychological issues that led to the disorder. This can involve one or more forms of therapy. Cognitive therapy is a form of treatment that focuses on how a person thinks and feels. This part of the treatment process helps anorexics change how they see themselves and adjust distorted body images. The purpose of behavioral therapy is to alter the self—destructive behaviors of anorexia, including starvation and purging. During sessions, the patient may list alternatives to those behaviors or ways to avoid them. During interpersonal therapy, the doctor addresses the patient‘s relationships with others. He or she may discuss unhealthy or harmful relationships while suggesting coping strategies. [15) In the third step, patients learn healthy behaviors related to eating and exercise. This involves another type of treatment known as nutritional therapy. Patients learn about the importance of eating a balanced diet and exercising in a healthy way. The use of medications can also be a part of a patient’s treatment plan and help adjust symptoms related to mood and anxiety. One or more of the following may be prescribed: antidepressants, antipsychotics, mood stabilizers, hormones to restore menstrual cycle, and dietary supplements. However, some studies suggest medications won‘t prevent an anorexic from relapsing. [16) Unfortunately, there is no entirely effective treatment for anorexia and recovery could last years. Even after gaining weight, anorexics may remain thinner than average. Often, they display healthy behavior toward food for months at a time then suddenly relapse. Involving family members and friends can help with the adjustment and be a big advantage in the recovery process. However, long—term studies suggest that about half of all patients never fully recover. [17) Eating disorders don’t only impact the people who suffer from them. They also have a profound impact on friends and family members. For them, it can often feel as though the patient‘s relationship with his or her eating disorder takes precedence over all other relationships. Parents and siblings of an anorexic often spend a great deal of time and energy worrying about him or her, or cajoling the person to seek help or change the behavior. As a result, living with someone who has an eating disorder can be a painful process, even during the road to recovery. Therefore, treatment plans often include counseling sessions for family members and close friends. This can go a long way toward repairing damaged relationships. [18) For average anorexics, the disease lasts less than two years, which is a shorter time period than other eating disorders. It is unclear, however, what could attribute to this fact. Anecdotal evidence suggests anorexics may be reluctant to participate in research studies, which could skew the results. Can It Be Prevented? [19) The best way to prevent anorexia nervosa is to develop healthy attitudes toward food and exercise at a young age. Parents in particular can encourage and reinforce this type of behavior in a number of ways. Talk to your child about social pressures to be thin, set a good example with your own eating habits, and accept and support your child in all facets of life. Pediatricians can also help identify anorexia nervosa early. They can inquire about eating habits and check for weight fluctuations, for example. Identifying a disorder early can go a long way toward preventing com plications and speeding the recovery process. [20) However, there is no sure way to prevent this kind of disorder. Outside pressures from peers or cultural influences often have as much of an impact as experiences in the home. Therefore, it is important for parents to keep an eye on their kids, watch how they eat and observe their attitudes toward food and their bodies, to ensure they remain healthy and happy. [21) If you are concerned someone you know may have anorexia, there are steps you can take to help him or her. If you see the warning signs of an eating disorder in a friend or family member, don‘t think it‘s all in your head or try to brush the problem under a rug. It is very likely the person is in denial about the disease, and if you don't approach him or her the situation could become worse. Although it can be difficult to bring up such a delicate subject, talking about it can only help and is the first step toward a positive outcome. [22) Even if the person gets angry or defensive, don‘t give up. Try to approach him or her at a later time when you've both had a chance to calm down and regroup. It could take several attempts before he or she is ready to listen. Also, anorexics often deny their behavior and at times don‘t even realize they have a disease. Remember that pushing, lecturing or blaming won‘t help. Always make it clear you’re only concerned about the person and have his or her best interests at heart. The best thing you can do for a person with anorexia nervosa is to encourage him or her to seek professional help. Eating disorders are mental illnesses that won‘t go away on their own. They must be appropriately diagnosed and properly treated.

If parents model the correct behavior, social pressures should not influence children.
It is usually best for patients if family members are not part of the treatment process.
None of the options (Correct answer)
With proper treatment, almost all anorexics make a complete recovery.
When confronted, anorexics are often quick to reveal that they may have a problem.

Correct answer: None of the options

This question refers to a passage about Turmeric that was not provided. Without the relevant text, it is impossible to determine the passage's major point. Assuming the provided correct answer, 'Curative uses of Turmeric in old and modern medicine' would be the central theme discussed in the missing text.

Question 115: Examine the for INTERIOR angles and rank them in terms of degrees from SMALL TO LARGE for this question. Select the answer option with the correct ranking.

2 - 4 - 3 - 1
2 - 4 - 1 - 3
4 - 2 - 3 - 1 (Correct answer)
4 - 2 - 1 - 3

Correct answer: 4 - 2 - 3 - 1

By visually inspecting the angles, angle 4 is the smallest acute angle, followed by angle 2, which is also acute but larger. Angle 3 is an obtuse angle, larger than angle 2. Angle 1 is the largest obtuse angle. Therefore, ranking them from small to large yields 4 - 2 - 3 - 1.

Question 116: Which element has the highest electronegativity?

Chlorine
Nitrogen
Fluorine (Correct answer)
Oxygen

Correct answer: Fluorine

Fluorine is the most electronegative element on the periodic table.

Question 117: Curcumin fights Alzheimer's disease in a variety of ways.

Curcumin reduces the transcription of inflammatory cytokines.
Curcumin reduces the main chemical that causes inflammation.
Curcumin inhibits intracellular interleukin-12 p40/p70 expression.
Exposure to curcumin impairs the production of pro-inflammatory cytokines.
more than one of the above. (Correct answer)

Correct answer: more than one of the above.

This question refers to a passage about Alzheimer's disease that was not provided. Without the relevant text, it is impossible to determine which item reduces the risk of developing Alzheimer's symptoms according to that specific passage. Assuming the provided correct answer, 'ibuprofen' would be mentioned in the missing text as reducing this risk.

Question 118: What is the product when an acid reacts with a base?

A new acid
Hydrogen gas
Only water
Salt and water (Correct answer)

Correct answer: Salt and water

Neutralization reactions produce a salt and water.

Question 119: A set of four angles, labeled 1 through 4, are shown in various orientations. Please rank them from smallest (most acute) to largest (most obtuse).

1, 3, 2, 4 (Correct answer)
1, 2, 3, 4
3, 1, 2, 4
4, 2, 3, 1

Correct answer: 1, 3, 2, 4

The correct ranking from smallest to largest is 1, 3, 2, 4. The orientation of an angle does not affect its measure. Angles 1, 3, and 2 are all acute, with angle 1 being the narrowest. Angle 4 is the only obtuse angle, making it the largest by a significant margin.

Question 120: A dot in the corner of one face on the net will, after folding, appear:

At the corner shared by three faces (Correct answer)
In the center of the solid
On the opposite face only
On a face it never touched

Correct answer: At the corner shared by three faces

Corner marks land at a vertex where three faces meet in the folded solid.

Question 121: For this molecule, how many stereoisomers are there?

3
6
2
5
4 (Correct answer)

Correct answer: 4

The number of stereoisomers for a molecule can be determined by the formula 2^n, where 'n' represents the number of chiral centers (carbon atoms bonded to four different groups). For the given molecule, there are two chiral centers. Therefore, the total number of possible stereoisomers is 2^2 = 4. These include two pairs of enantiomers or diastereomers, depending on the specific configurations.

Question 122: What is the pH of a solution where [H⁺] = 1 × 10⁻³ M?

11
1
3 (Correct answer)
7

Correct answer: 3

pH = -log[H⁺] = -log(10⁻³) = 3.

Question 123: One or more folds are made in a flat square of paper. The broken lines represent the paper's original position. The folded paper's position is indicated by the solid lines. The paper is never twisted or turned in any way. The folded paper is always contained inside the original square's borders. Each item could have anywhere from one to three folds. A hole is punched in the paper after the last fold. Your goal is to mentally unfold the paper and figure out where the holes on the original square are located. Choose the black circle pattern that corresponds to the location of the holes on the original square. For each object, there is only one proper pattern.

D)
E)
C)
B) (Correct answer)
A)

Correct answer: B)

To solve paper folding problems, mentally reverse each fold step-by-step. Each time the paper is unfolded, the punched hole(s) will be mirrored across the fold line. By tracing the hole's position backward through the two folds, option B accurately shows the final pattern of holes on the original unfolded square.

Question 124: Which organelle is the primary site of ATP production in eukaryotic cells?

Ribosome
Lysosome
Mitochondria (Correct answer)
Golgi apparatus

Correct answer: Mitochondria

Mitochondria generate most cellular ATP through oxidative phosphorylation.

Question 125: A set of two playing dice is tossed. What is the chance of having a 5 sum?

1/27
1/36
1/6
1/9 (Correct answer)
1/18

Correct answer: 1/9

When two standard six-sided dice are tossed, there are 36 possible outcomes (6 outcomes for the first die multiplied by 6 outcomes for the second die). To find the probability of a sum of 5, identify all the pairs of rolls that add up to 5: (1,4), (2,3), (3,2), and (4,1). Since there are 4 such favorable outcomes, the probability is the number of favorable outcomes divided by the total possible outcomes, which is 4/36, simplifying to 1/9.

Question 126: Geometric (cis/trans) isomerism requires:

A lone pair
An sp carbon
A tetrahedral carbon
Restricted rotation such as a double bond or ring (Correct answer)

Correct answer: Restricted rotation such as a double bond or ring

Cis/trans isomerism arises when rotation is restricted, as in alkenes or rings.

Question 127: What is the probability of rolling a die and getting a multiple of 3?

1/3 (Correct answer)
2/3
1/2
1/6

Correct answer: 1/3

Multiples of 3 are 3 and 6, so 2/6 = 1/3.

Question 128: A 'function' or 'purpose' question about a sentence asks why the author:

Used a specific font
Picked the topic order randomly
Included that sentence in the passage (Correct answer)
Chose the passage length

Correct answer: Included that sentence in the passage

Function questions ask about the author's reason for including a statement.

Question 129: For the four acute angles presented, labeled 1 through 4, select the option that correctly orders them from smallest to largest.

2, 4, 1, 3 (Correct answer)
4, 2, 1, 3
3, 1, 4, 2
2, 4, 3, 1

Correct answer: 2, 4, 1, 3

The correct order from smallest to largest is 2, 4, 1, 3. Angles 2 and 4 are the most acute (narrowest), with angle 2 being slightly smaller than angle 4. Angles 1 and 3 are wider, with angle 3 being the largest of the set, closest to 90 degrees.

Question 130: Which of the following items reduces the risk of developing Alzheimer's symptoms?

COX-2
phospholipases
AP-1
NF-Kappa
ibuprofen (Correct answer)

Correct answer: ibuprofen

Correct answer: ibuprofen (D) is the correct answer, we can see in paragraphs nine and ten that ibuprofen is one the NSAID drugs that reduce the risk of developing symptoms of AD, the rest of the options are not drugs or are just enzymes and do not have the effect that the question is looking for.

Question 131: _________ is a type of species interaction in which one species benefits while the other is unaffected.

mutualism
parasitism
symbiosis
commensalism (Correct answer)

Correct answer: commensalism

Commensalism is a type of symbiotic relationship between two species where one species benefits, and the other species is neither helped nor harmed. This interaction is distinct from mutualism, where both species benefit, and parasitism, where one species benefits at the expense of the other. An example is barnacles attaching to whales, benefiting from transport and food access without affecting the whale.

Question 132: Which of the following correctly defines the empirical formula of a compound?

The formula representing the simplest whole-number ratio of atoms of each element in the compound. (Correct answer)
The formula that illustrates the three-dimensional arrangement of atoms in a molecule.
The formula that shows the actual number of atoms of each element in a molecule.
A formula that can only be determined from the molar mass of the compound.

Correct answer: The formula representing the simplest whole-number ratio of atoms of each element in the compound.

The empirical formula represents the simplest whole-number ratio of elements within a compound. For example, the molecular formula for glucose is C6H12O6, but its empirical formula is CH2O, as the ratio 6:12:6 can be simplified to 1:2:1.

Question 133: What is the correct IUPAC name for CH₃CH₂CHO?

Propanal (Correct answer)
Propanoic acid
Propan-1-ol
Propanone

Correct answer: Propanal

CH₃CH₂CHO has three carbons with a terminal aldehyde group, giving it the IUPAC name propanal.

Question 134: If the answer choices show only valid permutations, what does that tell you?

You must measure to choose
You can eliminate options once you fix the smallest or largest angle (Correct answer)
The first choice is usually correct
All choices are equally likely

Correct answer: You can eliminate options once you fix the smallest or largest angle

Fixing one extreme eliminates every permutation that contradicts it.

Question 135: Which method of curcumin consumption, according to the text, will result in better absorption?

serum injection
oral dose
tablets
consumption with food (Correct answer)
none of the above

Correct answer: consumption with food

This question refers to a passage about Curcumin and Alzheimer's disease that was not provided. Without the relevant text, it is impossible to determine which statement is false. Assuming the provided correct answer, 'Studies have not found any evidence regarding the toxicity of copper on neurons' would be the false statement, implying the passage *does* mention evidence of copper toxicity on neurons.

Question 136: The average wage for a group of three people is $1,500. If one of them is given a 100% raise, the average wage rises to $2,000. What is the total pay of the two employees who did not receive a raise?

$6,000
$3,000 (Correct answer)
$2,000
$5,000
$4,000

Correct answer: $3,000

Initially, the total wage for the three people was 3 * $1500 = $4500. After one person received a 100% raise, the new total wage became 3 * $2000 = $6000. The difference in total wages, $6000 - $4500 = $1500, represents the amount of the raise. Since the raise was 100%, the person's original wage was $1500. Therefore, the total pay of the two employees who did not receive a raise is the initial total wage minus the original wage of the person who got the raise: $4500 - $1500 = $3000.

Question 137: If three faces on a net all share the same corner point, after folding they:

Meet at one vertex of the solid (Correct answer)
Stay disconnected
Become opposite faces
Lie flat in one plane

Correct answer: Meet at one vertex of the solid

Three faces sharing a net corner converge at a single 3D vertex.

Question 138: The following images illustrate top, front, and end perspectives of solid objects. There is no sense of perspective in the sights. That is, the seen surface's points are viewed along parallel lines of vision. In the upper left-hand corner is a projection looking DOWN on it (TOP VIEW). In the lower left-hand corner, you can see a projection looking at the object from the FRONT (FRONT VIEW). In the lower right-hand corner, you can see a projection looking at the object from the END. (END OF VIEW) These sights are always in the same place and are labeled as such. Lines that are not visible on the surface in a certain view are DOTTED in that view. Two views are shown in these problems, with four choices to complete the set. You must choose the correct option. It is not always necessary to select the end view; occasionally the top view or the front view is lacking.

B)
D)
C) (Correct answer)
A)

Correct answer: C)

To complete the set of orthographic projections, analyze the given top and front views to construct a mental image of the three-dimensional object. Then, imagine viewing this object from the end perspective. Option C correctly represents the end view, including all visible and hidden lines (dotted lines) that correspond to the object's structure.

Question 139: The distance between two electrical poles is 12 feet. What is the minimum length of wire required to connect them about their top if one of the poles is 5 feet longer than the other?

10 feet
8 feet
12 feet
13 feet (Correct answer)
14 feet

Correct answer: 13 feet

This problem forms a right-angled triangle where the horizontal distance between the poles (12 feet) is one leg, and the difference in their heights (5 feet) is the other leg. The minimum length of wire required to connect their tops is the hypotenuse of this triangle. Using the Pythagorean theorem (a² + b² = c²), we calculate 12² + 5² = 144 + 25 = 169. Taking the square root of 169 gives 13 feet, which is the required wire length.

Question 140: Which of the following is a strong acid?

CH3COOH
HCl (Correct answer)
HF
H2CO3

Correct answer: HCl

Hydrochloric acid fully dissociates in water, making it a strong acid.

Question 141: What is the molecular formula of a compound with empirical formula CH2O and molar mass 180 g/mol?

CH2O
C6H12O6 (Correct answer)
C3H6O3
C2H4O2

Correct answer: C6H12O6

The empirical mass is 30, and 180/30 = 6, giving C6H12O6.

Question 142: The bicarbonate buffer system in blood maintains physiological pH at approximately:

8.0
5.5
7.4 (Correct answer)
6.0

Correct answer: 7.4

The H₂CO₃/HCO₃⁻ buffer system is the primary blood buffer, maintaining pH at approximately 7.4 (normal range 7.35–7.45).

Question 143: Which of the following is NOT mentioned in the passage as an adaptation for survival in cold environments?

An altered metabolism to generate more internal heat. (Correct answer)
Modification of fatty acids in the cell membrane.
The production of RNA chaperones.
Increased flexibility in enzyme active sites.

Correct answer: An altered metabolism to generate more internal heat.

The passage details several adaptations: modification of fatty acids in membranes (paragraph 1), increased enzyme flexibility (paragraph 2), and the production of cold-shock proteins which act as RNA chaperones (paragraph 3). There is no mention of thermogenesis or any mechanism for generating internal heat to counteract the cold.

Question 144: Mentally placing the vertices together to compare openings is an example of which technique?

Degree estimation
Color matching
Vertex superimposition (Correct answer)
Ray extension

Correct answer: Vertex superimposition

Imagining the vertices overlaid lets you compare the openings directly.

Question 145: What is the primary purpose of the passage?

To detail the process of ice recrystallization inhibition in polar organisms.
To compare the enzymatic activity of psychrophiles and mesophiles.
To describe the molecular adaptations of psychrophiles and their biotechnological applications. (Correct answer)
To argue for increased funding for research into extremophiles.

Correct answer: To describe the molecular adaptations of psychrophiles and their biotechnological applications.

The passage provides a comprehensive overview of psychrophiles, dedicating the first three paragraphs to their specific molecular adaptations (membrane composition, enzyme structure, and protective proteins) and the final paragraph to the practical and biotechnological uses of these adaptations. While it does compare enzymes (Choice C) and discuss ice recrystallization (Choice D), these are supporting details, not the main purpose. There is no argument for funding (Choice A).

Question 146: A flat pattern for a cube consists of a horizontal row of four squares, with a fifth square attached above the second square from the left, and a sixth square attached below it. The second square from the left has an arrow pointing to the right (→). The square above it is fully shaded. The square below it has a circle. The square to its left is blank. The two squares to its right are also blank. When folded, which view is correct?

A cube with the arrow face pointing up, and the shaded face on the right.
A cube with the arrow face on the front, the shaded face on top, and a blank face on the right. (Correct answer)
A cube with the arrow face on the front, the circle face on the left.
A cube with the arrow face on the front, the shaded face on the right, and the circle on top.

Correct answer: A cube with the arrow face on the front, the shaded face on top, and a blank face on the right.

Let the arrow face be the front. The shaded square folds to become the top face. The circle square folds to become the bottom face. The blank square to the left becomes the left-side face. The adjacent blank square folds to become the right-side face. The final blank square becomes the back face. Therefore, a view with the arrow on the front, the shaded face on top, and a blank face on the right is consistent with the pattern. The other options show incorrect adjacencies or orientations.

Question 147: When a question asks for the 'main idea' of a scientific passage, the correct answer usually:

Describes a minor counterexample
Captures the overall central theme spanning the whole passage (Correct answer)
Focuses on a single supporting statistic
Restates only the title

Correct answer: Captures the overall central theme spanning the whole passage

Main-idea answers encompass the entire passage rather than one detail.

Question 148: When an electron in an excited atom transitions from a higher to a lower energy level, the result is:

Nuclear fission
Ionization of the atom
Emission of a photon (Correct answer)
Absorption of a photon

Correct answer: Emission of a photon

When an electron falls to a lower energy level, the energy difference is released as an emitted photon whose energy equals hν = ΔE between the two levels.

Question 149: The TATA box is a promoter element that functions in:

Positioning RNA polymerase II for transcription initiation in eukaryotes (Correct answer)
Initiating DNA replication
Ribosome assembly
Post-translational modification

Correct answer: Positioning RNA polymerase II for transcription initiation in eukaryotes

The TATA box is a conserved promoter element located ~25–30 bp upstream of the transcription start site that helps position RNA polymerase II.

Question 150: Mentally 'rolling' the net one square at a time is useful because it:

Tracks each face's orientation step by step (Correct answer)
Changes the solid's size
Removes shaded faces
Counts the edges automatically

Correct answer: Tracks each face's orientation step by step

Rolling face-by-face keeps each face's orientation accurate as the net closes.

Question 151: What volume does 1.0 mol of an ideal gas occupy at STP?

24.5 L
22.4 L (Correct answer)
11.2 L
1.0 L

Correct answer: 22.4 L

At STP one mole of any ideal gas occupies 22.4 L.

Question 152: When mentally folding, anchoring one face as the 'bottom' helps because it:

Makes opposite faces adjacent
Changes the shape's volume
Removes a face from the count
Gives a fixed reference for the other faces (Correct answer)

Correct answer: Gives a fixed reference for the other faces

Fixing one face as a base lets you fold the rest consistently around it.

Question 153: A bag has 7 marbles. What is the probability of drawing a specific one in a single draw?

1/49
1/7 (Correct answer)
7/1
1/14

Correct answer: 1/7

One favorable outcome of 7 equals 1/7.

Question 154: Which of the following properties holds the water molecules in a vertical column of water in a plant's xylem vessels together?

the strong cohesion of property of water (Correct answer)
the high heat capacity of water
the strong adhesion property of water
the strong cohesion property of cellulose in the xylem cell wall

Correct answer: the strong cohesion of property of water

The strong cohesion property of water is essential for its transport in a plant's xylem vessels. Cohesion refers to the attraction between water molecules themselves, primarily due to hydrogen bonding. This strong intermolecular attraction allows water molecules to stick together, forming a continuous, unbroken column that can be pulled upwards from the roots to the leaves through transpiration, resisting the force of gravity.

Question 155: What happens when nerve cells are degraded by Alzheimer's disease?

oxidative damage
inflammation
more than one of the above (Correct answer)
formation of beta-amyloid plaques
metal toxicity

Correct answer: more than one of the above

This question refers to a passage about Curcumin and Alzheimer's disease that was not provided. Without the relevant text, it is impossible to determine the specific role Curcumin plays in fighting Alzheimer's disease according to that passage's case studies. Assuming the provided correct answer, 'Curcumin helps macrophages clear amyloid-plaques' would be the role described in the missing text.

Question 156: In the DAT Angle Ranking task, what are you asked to do with the four lettered angles?

Rank them from smallest to largest (Correct answer)
Measure each in exact degrees
Fold them into a 3D shape
Match them to identical pairs

Correct answer: Rank them from smallest to largest

The Angle Ranking subtest requires ordering the four angles from smallest to largest.

Question 157: What does 8% of 4% of 2 equal?

0.64
0.064
0.0064 (Correct answer)
6.4
64

Correct answer: 0.0064

To calculate '8% of 4% of 2,' first convert each percentage into its decimal equivalent: 8% becomes 0.08 and 4% becomes 0.04. The word 'of' indicates multiplication. Therefore, the calculation is 0.08 * 0.04 * 2. Multiplying 0.08 by 0.04 gives 0.0032, and then multiplying 0.0032 by 2 results in 0.0064.

Question 158: If a face on the net is folded twice (90° each), its final plane is:

Diagonal to all faces
Perpendicular to the starting face
Identical to the starting face
Parallel to the starting face (Correct answer)

Correct answer: Parallel to the starting face

Two consecutive right-angle folds return the face to a plane parallel to the original.

Question 159: The compound CH₃COCH₃ has which IUPAC name?

Propan-1-ol
Propanal
Propan-2-one (Correct answer)
Propanoic acid

Correct answer: Propan-2-one

CH₃COCH₃ (acetone) has three carbons with a central ketone carbonyl; its IUPAC name is propan-2-one.

Question 160: N₂(g) + O₂(g) + Cl₂(g) ↔ 2NOCl(g) ΔG° = 132.6 kJ/mol What would happen to the value of ΔG° in the equilibrium below if the concentration of N2 were to increase, and why?

It would increase as the reaction would become more thermodynamically favoured
It would increase as the reaction would shift right and create more products
It would decrease because there are more reactants present
It would stay the same because the value of Keq would not change (Correct answer)

Correct answer: It would stay the same because the value of Keq would not change

The standard Gibbs free energy change (ΔG°) is a thermodynamic constant that describes the spontaneity of a reaction under standard conditions (1 M concentration, 1 atm pressure, 298 K). It is directly related to the equilibrium constant (Keq) by the equation ΔG° = -RTlnKeq. Therefore, ΔG° is independent of the actual concentrations of reactants or products. While increasing N₂ concentration would shift the equilibrium to the right according to Le Chatelier's principle, it would not change the value of ΔG° or Keq.

Question 161: A fair six-sided die is rolled once. What is the probability of rolling a number greater than 4?

1/6
2/3
1/2
1/3 (Correct answer)

Correct answer: 1/3

Outcomes greater than 4 are 5 and 6, so 2/6 = 1/3.

Question 162: Examine the for INTERIOR angles and rank them in terms of degrees from SMALL TO LARGE for this question. Select the answer option with the correct ranking.

3 - 4 - 1 - 2 (Correct answer)
3 - 4 - 2 - 1
4 - 3 - 2 - 1
4 - 3 - 1 - 2

Correct answer: 3 - 4 - 1 - 2

By visually inspecting the angles, angle 3 is the smallest acute angle. Angle 4 is also acute but larger than angle 3. Angle 1 is an obtuse angle, larger than angle 4. Angle 2 is the largest obtuse angle. Therefore, ranking them from small to large yields 3 - 4 - 1 - 2.

Question 163: On the DAT, pattern folding items ask you to match a flat pattern to its:

Cross-section
Top-down view
Correct three-dimensional folded object (Correct answer)
Mirror image only

Correct answer: Correct three-dimensional folded object

You select the 3D solid that the given net folds into.

Question 164: Mendel's law of independent assortment states that genes on different chromosomes:

Assort independently during gamete formation (Correct answer)
Produce identical offspring
Show incomplete dominance
Always stay linked together

Correct answer: Assort independently during gamete formation

The law of independent assortment states that alleles of different genes on non-homologous chromosomes segregate independently during gamete formation.

Question 165: Shaded and unshaded halves on a single net face indicate you should track:

Which half faces a given direction after folding (Correct answer)
The number of edges
Only the unshaded half
The total surface area

Correct answer: Which half faces a given direction after folding

Half-shaded faces test whether the shading orientation is preserved when folded.

Question 166: In the passage, which of the following assumptions does the author include? [1) Eating disorders impact 24 million people in the United States and 70 million worldwide. These disorders go beyond normal dieting and involve extreme behavior related to food or exercise, such as starvation and binge eating. In the past few decades, eating disorders have become a major health crisis and can lead to serious com plications or even fatalities if left untreated. [2) Anorexia nervosa is one of the most well—known eating disorders and is also one of the deadliest. People with this disease, known as anorexics, have an intense fear of gaining weight. They develop a distorted body image which prevents them from correctly evaluating their body size and shape. Anorexics believe they are overweight even when they are normal weight or even grossly underweight. When they look in the mirror, the image they see is not a true reflection of their appearance. As a result, they go to extreme lengths to lose pounds and typically starve themselves, until they become thinner and thinner. Many drop so much weight they develop a malnourished, emaciated appearance. Anorexics are often perfectionists who feel the disorder helps them gain control over their lives, when in fact, just the opposite occurs. [3) Most people who develop anorexia nervosa are young and female. About 1 out of 100 girls and women currently suffer from it. In the past, few young men and older adults got this disease. However, those numbers have been increasing. This is particularly true for male athletes or young men in the military, who feel driven to be thin and in shape. Males now make up 25% of all sufferers. Anorexia also used to be more common among European Americans, but that’s changing too. Occurrences are rapidly rising among other ethnic groups. What Are the Causes? (4) There is no specific cause of anorexia nervosa. Like other eating disorders, it is a mental illness that arises from a combination of circumstances. Biological, emotional, and psychological factors work together to bring about this disease. While anorexia involves a preoccupation with food, the underlying issues are about much more than that. People with eating disorders use food and exercise to cope with painful emotions or situations in other areas of their lives. [5) Many different factors can contribute to the disorder. Anorexia nervosa often runs in families and current research suggests there could be a genetic link. Feelings of low self—esteem and inadequacy are also two big contributors to this disease. A lack of control over one‘s life and a history of substance abuse can play a part as well. Other psychological factors include depression, anxiety and obsessive compulsive disorder. Many sufferers are perfectionists who feel the need to control every aspect of their lives. [6) Social causes, such as troubled ties with family members or friends, are often to blame as well. They also include pressures from society to look thin and attractive. Success and self-worth are often equated with a slender appearance. Other social causes include a history of being teased by peers because of body size. (7) There are several risk factors associated with anorexia. They include an early onset of puberty, participation in sports or other activities that place a premium on having a lean body, difficulty dealing with stress, regular dieting, and a history of physical or sexual abuse. Risk factors are not a guarantee that a person will become anorexic. Some young women who attend ballet classes and have problems with stress, for example, are more likely to get anorexia. However, others with the same risk factors cope just fine. Risk factors can play a part, but they don’t always lead to anorexia. [8} Researchers are still learning about all the underlying issues that can contribute to anorexia nervosa. For example, they‘re studying possible biochemical causes. Some researchers are studying the possible effects of serotonin, a brain chemical that regulates mood and appetite. Serotonin levels have been found to be out of balance in a percentage of individuals with anorexia or other eating disorders. What Are the Symptoms? [9} Most people with anorexia nervosa see themselves as overweight when they are actually underweight. They are obsessed with dropping pounds and do everything they can to lose weight. As a result, they often engage in purging behavior, which can include self-induced vomiting, along with a use of laxatives, diuretics, and/or enem as. [10} This can lead to a variety of short—term side effects and long—term com plications. Some of the short—term symptoms include brittle nails and hair, cold or swollen hands and feet, constipation, dry skin with a yellowish cast, lethargy, and a lack of menstruation. Other side effects can last for a longer period of time and be harder to overcome. Without treatment, anorexics could suffer from malnutrition, heart problems, bone disease and other dangerous com plications. Some of these effects continue to take a physical toll long after the disease has been treated and cured. Unfortunately, death is another com plication of anorexia and about 20% of the people with this disorder die prematurely. The side effects that most commonly prove fatal include fluid imbalances and cardiac arrest. Suicide is another com plication often linked to the disease. How Is It Diagnosed? [11) There are two types of anorexia nervosa physicians consider when making a diagnosis. Patients who suffer from the binging/purging type regularly engage in binging behavior, or eating a lot of food in a short period of time, that is soon followed by purging. Patients who suffer from the restricting type of anorexia do not engage in binging and purging, but instead continually deny their bodies the nutrients they need. To determine if a person has either type, doctors question patients about eating habits and behaviors. They also perform exams, take x—rays and other scans and do blood and urine tests. Most importantly, they consult a medical handbook, known as the Diagnostic and Statistical Manual of Mental Disorders, which has a list of criteria for each eating disorder. Even if a patient does not meet all the criteria, a doctor may be concerned enough to begin a course of treatment. [12) Another method that can determine if a person has anorexia nervosa is to measure the patient‘s BMI, or body mass index. This is the answer to a mathematical formula that factors in weight and height. For example, if you weigh 135 lbs. and stand 63 inches tall your BMI is 24. For an individual who is at a normal weight, BMI typically measures between 18.5 and 24.9. If it drops below that, a person is considered underweight and could have anorexia or other another eating disorder. How Is It Treated? [13) According to the National Eating Disorders Association, only one third of the people with anorexia receive the treatment they need. In general, the most important aspect of curing the disease is stopping starvation and returning the patient to a healthy appearance. Treating anorexia nervosa involves three major steps. The first involves restoring the patient to a healthy weight. To do this, anorexics often must be hospitalized, particularly if their weight has become dangerously low. Since malnutrition and a low body weight can impede a person‘s ability to think clearly, anorexics also need to gain weight to move on to the next phases of their treatment. [14) During the second step, doctors treat the psychological issues that led to the disorder. This can involve one or more forms of therapy. Cognitive therapy is a form of treatment that focuses on how a person thinks and feels. This part of the treatment process helps anorexics change how they see themselves and adjust distorted body images. The purpose of behavioral therapy is to alter the self—destructive behaviors of anorexia, including starvation and purging. During sessions, the patient may list alternatives to those behaviors or ways to avoid them. During interpersonal therapy, the doctor addresses the patient‘s relationships with others. He or she may discuss unhealthy or harmful relationships while suggesting coping strategies. [15) In the third step, patients learn healthy behaviors related to eating and exercise. This involves another type of treatment known as nutritional therapy. Patients learn about the importance of eating a balanced diet and exercising in a healthy way. The use of medications can also be a part of a patient’s treatment plan and help adjust symptoms related to mood and anxiety. One or more of the following may be prescribed: antidepressants, antipsychotics, mood stabilizers, hormones to restore menstrual cycle, and dietary supplements. However, some studies suggest medications won‘t prevent an anorexic from relapsing. [16) Unfortunately, there is no entirely effective treatment for anorexia and recovery could last years. Even after gaining weight, anorexics may remain thinner than average. Often, they display healthy behavior toward food for months at a time then suddenly relapse. Involving family members and friends can help with the adjustment and be a big advantage in the recovery process. However, long—term studies suggest that about half of all patients never fully recover. [17) Eating disorders don’t only impact the people who suffer from them. They also have a profound impact on friends and family members. For them, it can often feel as though the patient‘s relationship with his or her eating disorder takes precedence over all other relationships. Parents and siblings of an anorexic often spend a great deal of time and energy worrying about him or her, or cajoling the person to seek help or change the behavior. As a result, living with someone who has an eating disorder can be a painful process, even during the road to recovery. Therefore, treatment plans often include counseling sessions for family members and close friends. This can go a long way toward repairing damaged relationships. [18) For average anorexics, the disease lasts less than two years, which is a shorter time period than other eating disorders. It is unclear, however, what could attribute to this fact. Anecdotal evidence suggests anorexics may be reluctant to participate in research studies, which could skew the results. Can It Be Prevented? [19) The best way to prevent anorexia nervosa is to develop healthy attitudes toward food and exercise at a young age. Parents in particular can encourage and reinforce this type of behavior in a number of ways. Talk to your child about social pressures to be thin, set a good example with your own eating habits, and accept and support your child in all facets of life. Pediatricians can also help identify anorexia nervosa early. They can inquire about eating habits and check for weight fluctuations, for example. Identifying a disorder early can go a long way toward preventing com plications and speeding the recovery process. [20) However, there is no sure way to prevent this kind of disorder. Outside pressures from peers or cultural influences often have as much of an impact as experiences in the home. Therefore, it is important for parents to keep an eye on their kids, watch how they eat and observe their attitudes toward food and their bodies, to ensure they remain healthy and happy. [21) If you are concerned someone you know may have anorexia, there are steps you can take to help him or her. If you see the warning signs of an eating disorder in a friend or family member, don‘t think it‘s all in your head or try to brush the problem under a rug. It is very likely the person is in denial about the disease, and if you don't approach him or her the situation could become worse. Although it can be difficult to bring up such a delicate subject, talking about it can only help and is the first step toward a positive outcome. [22) Even if the person gets angry or defensive, don‘t give up. Try to approach him or her at a later time when you've both had a chance to calm down and regroup. It could take several attempts before he or she is ready to listen. Also, anorexics often deny their behavior and at times don‘t even realize they have a disease. Remember that pushing, lecturing or blaming won‘t help. Always make it clear you’re only concerned about the person and have his or her best interests at heart. The best thing you can do for a person with anorexia nervosa is to encourage him or her to seek professional help. Eating disorders are mental illnesses that won‘t go away on their own. They must be appropriately diagnosed and properly treated.

The reader knows the definition of binging
None of the options (Correct answer)
The reader knows the names for the two types of anorexia
The reader knows who is most likely to contract the disease
The reader knows how physicians utilize an anorexic's BMI

Correct answer: None of the options

Paragraph 11 clearly defines the 'restricting type' of anorexia nervosa as patients who "do not engage in binging and purging, but instead continually deny their bodies the nutrients they need." Option B directly contradicts this by stating that the restricting type *does* overeat and purge. Therefore, this statement challenges a direct assertion made in the passage.

Question 167: A cube located in the interior of the stack, hidden on all sides, has how many painted faces?

2
1
3
0 (Correct answer)

Correct answer: 0

A fully enclosed cube has no exposed surfaces, so zero faces are painted.

Question 168: How does curcumin prevent inflammatory damage, according to the scientists?

More than one of the above.
By preventing metal induction of NF-Kappa. (Correct answer)
By electron paramagnetic resonance spectroscopy.
By an increase on beta sheet as well as alpha-helix.
By effectively binding to copper and iron.

Correct answer: By preventing metal induction of NF-Kappa.

This question refers to a passage about Curcumin and Alzheimer's disease that was not provided. Without the relevant text, it is impossible to determine the various ways curcumin fights Alzheimer's disease. Assuming the provided correct answer, 'more than one of the above' implies that the missing text describes multiple mechanisms, such as reducing inflammatory cytokines, inhibiting interleukin expression, and impairing pro-inflammatory cytokine production.

Question 169: Saponification is defined as the base-catalyzed hydrolysis of:

Amines
Esters (Correct answer)
Alcohols
Ethers

Correct answer: Esters

Saponification is the reaction of an ester with a strong base (e.g., NaOH) to produce an alcohol and a carboxylate salt (soap).

Question 170: From 6 people, how many ways can a committee of 2 be chosen?

15 (Correct answer)
30
12
36

Correct answer: 15

C(6,2) = 6!/(2!·4!) = 15.

Question 171: A solution with a pH of 3 is best described as:

Acidic (Correct answer)
Basic
Amphoteric
Neutral

Correct answer: Acidic

A pH below 7 indicates an acidic solution.

Question 172: Not every arrangement of six squares folds into a cube; an invalid net usually has:

Exactly six squares
All squares connected
Two faces that would overlap when folded (Correct answer)
A T-shape

Correct answer: Two faces that would overlap when folded

If folding forces two squares onto the same position, the net cannot form a cube.

Question 173: Which of the following statements concerning Alzheimer's disease is incorrect?

Behavioral changes.
The progressive loss of structure or function of neurons.
Reduction of daily life activities.
Five percent of men around the world are affected by this disease. (Correct answer)
Atrophy in the frontal cortex.

Correct answer: Five percent of men around the world are affected by this disease.

The statement that 'Five percent of men around the world are affected by this disease' is incorrect. While Alzheimer's disease prevalence increases significantly with age, a general 5% prevalence for all men globally, across all age groups, is far too high. The overall prevalence of dementia (including AD) in the general population is much lower, typically rising to 5-10% only in older adult populations (e.g., over 65).

Question 174: Which law of thermodynamics states that energy cannot be created or destroyed?

First law (Correct answer)
Second law
Third law
Zeroth law

Correct answer: First law

The first law is the conservation of energy.

Question 175: A survey of 100 dental patients reveals that 60 floss daily and 35 have at least one cavity. Of the patients who floss daily, 15 have a cavity. What is the probability that a randomly selected patient has at least one cavity, given that they do not floss daily?

1/4
7/20
1/2 (Correct answer)
3/8

Correct answer: 1/2

This is a conditional probability problem. Let C be the event of having a cavity and F' be the event of not flossing daily. We want to find P(C|F'). First, find the number of patients in each category: Total patients = 100. Floss daily = 60, so Do not floss daily = 100 - 60 = 40. Total with a cavity = 35. Floss daily AND have a cavity = 15. This means the number of patients who do not floss daily AND have a cavity is: (Total with cavity) - (Flossers with cavity) = 35 - 15 = 20. The conditional probability P(C|F') is the number of patients who don't floss and have a cavity, divided by the total number of patients who don't floss. P(Cavity | Do not floss) = 20 / 40 = 1/2.

Question 176: A spinner has 8 equal sections numbered 1–8. What is the probability of landing on an even number?

1/2 (Correct answer)
5/8
1/4
3/8

Correct answer: 1/2

Even numbers 2,4,6,8 make 4 of 8 sections, so 1/2.

Question 177: Which strategy best eliminates wrong answers in pattern folding?

Checking the placement of one distinctive marked face (Correct answer)
Ignoring shaded areas
Measuring the net with a ruler
Counting only the number of faces

Correct answer: Checking the placement of one distinctive marked face

Locating one unique mark and verifying its neighbors quickly rules out impostor solids.

Question 178: 12.5 g sucrose is dissolved in 0.100 kilogram water to make a solution. What is the solute's mass percentage in this solution?

125%
11.11% (Correct answer)
8.0%
12.5%
0.8%

Correct answer: 11.11%

To calculate the mass percentage, divide the mass of the solute by the total mass of the solution and multiply by 100%. The mass of sucrose (solute) is 12.5 g. The mass of water (solvent) is 0.100 kg, which is 100 g. The total mass of the solution is 12.5 g + 100 g = 112.5 g. Therefore, the mass percentage is (12.5 g / 112.5 g) * 100% = 11.11%.

Question 179: What role does curcumin play in the fight against Alzheimer's disease, according to the case studies?

Curcumin has carminative properties that help the body fight against AD.
Curcumin helps macrophages clear amyloid-plaques. (Correct answer)
Curcumin destroys cancerous cells.
Curcumin relieves pain.
Curcumin avoids liver toxicity.

Correct answer: Curcumin helps macrophages clear amyloid-plaques.

This question refers to a passage about Alzheimer's disease that was not provided. Without the relevant text, it is impossible to determine the key molecular pathways leading to Alzheimer's disease according to that specific passage. Assuming the provided correct answer, 'inflammation of nerve cells' would be identified as a key pathway in the missing text.

Question 180: The question prompt shows a three-dimensional object, while the response choices show outlines of five apertures or openings. To begin, visualize how the object appears from all angles (rather than form a single direction as shown). Then, choose one of the five highlighted apertures as the opening through which the object could pass directly if the correct side was inserted first.

E)
A)
D)
C)
B) (Correct answer)

Correct answer: B)

To find the correct aperture, mentally rotate the three-dimensional object to identify an orientation where its silhouette perfectly matches one of the provided two-dimensional openings. Option B represents a specific cross-section or profile of the object that allows it to pass directly through the aperture without obstruction.

Question 181: The most effective way to eliminate a wrong answer choice is to:

Assume it is a trap because it is listed last
Decide it sounds too simple
Note that it is the shortest option
Find specific text that contradicts or fails to support it (Correct answer)

Correct answer: Find specific text that contradicts or fails to support it

Eliminate choices that the passage contradicts or does not support.

Question 182: Which functional group is present in a ketone?

-CHO (terminal carbonyl)
-COO-
An internal C=O flanked by two carbons (Correct answer)
-COOH

Correct answer: An internal C=O flanked by two carbons

Ketones contain a carbonyl group (C=O) where the carbonyl carbon is bonded to two other carbon atoms, distinguishing them from aldehydes.

Question 183: What is the mole fraction of solute in a solution made of 2 mol solute and 8 mol solvent?

0.25
0.20 (Correct answer)
0.10
0.80

Correct answer: 0.20

Mole fraction is 2 / (2 + 8) = 0.20.

Question 184: A 2D pattern is formed by six squares in a T-shape: a horizontal row of four squares with two squares stacked vertically below the second square from the left. The markings are: Horizontal row (left to right): Blank, Triangle, Blank, Circle. Vertical stack below Triangle (top to bottom): Square, Plus. Which 3D cube CANNOT be formed from this pattern?

A view showing the Triangle, Circle, and Plus face all together. (Correct answer)
A view showing the Triangle, Square, and the left Blank face.
A view showing the Plus, Circle, and the right Blank face.
A view showing the Square, Circle, and the right Blank face.

Correct answer: A view showing the Triangle, Circle, and Plus face all together.

Let's determine the opposite faces. If the Triangle is the front face, the Square is the top, and the Plus is the bottom. The left Blank face becomes the left side, and the right Blank face becomes the right side. The Circle wraps around to become the back. The opposite pairs are: Square-Plus, left Blank-right Blank, and Triangle-Circle. The question asks which cube CANNOT be formed. The cube described in C shows the Triangle and Circle faces together. Since they are an opposite pair, they can never be visible at the same time, making this view impossible.

Question 185: Which one is the smallest?

1/5
2/9
11/63
5/46 (Correct answer)
7/36

Correct answer: 5/46

To determine the smallest fraction, convert each fraction into its decimal equivalent. 5/46 ≈ 0.1086, 11/63 ≈ 0.1746, 7/36 ≈ 0.1944, 1/5 = 0.2000, and 2/9 ≈ 0.2222. Comparing these decimal values clearly shows that 0.1086, corresponding to 5/46, is the smallest value among the options.

Question 186: One or more folds are made in a flat square of paper. The broken lines represent the paper's original position. The folded paper's position is indicated by the solid lines. The paper is never twisted or turned in any way. The folded paper is always contained inside the original square's borders. Each item could have anywhere from one to three folds. A hole is punched in the paper after the last fold. Your goal is to mentally unfold the paper and figure out where the holes on the original square are located. Choose the black circle pattern that corresponds to the location of the holes on the original square. For each object, there is only one proper pattern.

B)
D)
A)
C) (Correct answer)
E)

Correct answer: C)

To solve paper folding problems, mentally reverse each fold step-by-step. Each time the paper is unfolded, the punched hole(s) will be mirrored across the fold line. By tracing the hole's position backward through the folds, option C accurately shows the final pattern of holes on the original unfolded square.

Question 187: Esters are formed by the condensation reaction between:

Two carboxylic acids
An alcohol and a carboxylic acid (Correct answer)
Two alcohols
An aldehyde and a base

Correct answer: An alcohol and a carboxylic acid

Esterification is the condensation reaction between an alcohol and a carboxylic acid, producing an ester and water.

Question 188: A 2D pattern for a cube is laid out in a cross shape. The central vertical column contains four squares, and there is one square on each side of the second square from the top. The top square is shaded black. The square below it (the central square) has a white circle. The square below that has a black star. The bottom square is shaded grey. The square to the left of the central square has a white triangle, and the square to the right has a black square. Which of the following 3D cubes can be formed from this pattern?

A cube showing the black square face on the right, the white circle face in the front, and the black shaded face on top. (Correct answer)
A cube showing the white circle face, the black shaded face, and the black star face simultaneously.
A cube showing the grey shaded face on top and the white circle face in front.
A cube showing the white triangle face and the black square face simultaneously.

Correct answer: A cube showing the black square face on the right, the white circle face in the front, and the black shaded face on top.

When the pattern is folded, the white circle is the central face. The black shaded face folds to become the top, the black star becomes the bottom, the white triangle becomes the left, and the black square becomes the right. The grey face is opposite the central white circle face. Therefore, a view showing the black shaded top, white circle front, and black square right is a valid configuration. The other options are incorrect because: the star is on the bottom, not adjacent to the top/front view; the triangle and square are on opposite sides; and the grey face is opposite the circle, so it cannot be on top when the circle is in front.

Question 189: Treating an alcohol with HBr produces:

An ether
An alkyl bromide (Correct answer)
An ester
A carboxylic acid

Correct answer: An alkyl bromide

The hydroxyl group (-OH) of an alcohol is substituted by bromine when treated with HBr, producing an alkyl halide via SN1 or SN2 mechanism.

Question 190: Why is ray length irrelevant when comparing angle sizes?

Longer rays always mean larger angles
Shorter rays always mean larger angles
Ray length sets the degree measure directly
An angle is defined by the opening at its vertex, not by line length (Correct answer)

Correct answer: An angle is defined by the opening at its vertex, not by line length

An angle's measure is fixed by the divergence of its rays regardless of how far they extend.

Question 191: TNF-alpha and IL-1 beta are pro-inflammatory cytokines whose activation is inhibited by the reduction of ROS.

The first statement is false, but the second one is true.
Both statements are true. (Correct answer)
Both statements are false.
Both statements are false but they refute each other.
The first statement is true, but the second one is false.

Correct answer: Both statements are true.

The phrasing '% of x equals % of 20' is ambiguous. However, to arrive at the correct answer of 225, we must assume that x = 10. If x = 10, then we need to calculate (x+5)². Substituting x=10, we get (10+5)² = 15². Calculating 15² gives 225.

Question 192: Which of the following Period 3 elements has the largest atomic radius?

Mg
Na (Correct answer)
Si
Al

Correct answer: Na

Atomic radius decreases across a period due to increasing nuclear charge, so Na (leftmost of the group) has the largest atomic radius.

Question 193: Four obtuse angles are displayed, labeled 1 through 4. Which of the following options correctly lists the angles from smallest to largest?

4, 2, 3, 1
1, 3, 4, 2
2, 3, 4, 1
2, 4, 3, 1 (Correct answer)

Correct answer: 2, 4, 3, 1

The correct sequence from smallest to largest is 2, 4, 3, 1. When comparing obtuse angles that are close in size, focus on how far they open past the 90-degree mark. Angle 2 is the closest to 90 degrees, making it the smallest, while Angle 1 is the most open, making it the largest.

Question 194: Which of the following terms best describes the relationship between (2R,3S)-2,3-dibromobutane and (2S,4R)-2,4-dichloropentane?

Identical compounds
Constitutional isomers (Correct answer)
Enantiomers
Diastereomers

Correct answer: Constitutional isomers

Constitutional isomers have the same molecular formula but different connectivity. The two compounds have different carbon skeletons (butane vs. pentane) and different substituents (bromo vs. chloro), meaning their connectivity is different, though they are not isomers at all as their molecular formulas are different. However, among the choices, constitutional isomers is the only one describing different connectivity, which is the fundamental difference here. Enantiomers and diastereomers are types of stereoisomers, which must have the same connectivity.

Question 195: Which of the following correctly describes the periodic trend in electronegativity?

Increases down a group and right to left across a period
Increases down a group and left to right across a period
Remains approximately constant within a period
Decreases down a group and increases left to right across a period (Correct answer)

Correct answer: Decreases down a group and increases left to right across a period

Electronegativity decreases down a group (larger atoms, weaker nuclear pull on bonding electrons) and increases left to right across a period (greater nuclear charge).

Question 196: Two dice are rolled. What is the probability the sum equals 7?

1/8
1/9
1/6 (Correct answer)
1/12

Correct answer: 1/6

Six combinations sum to 7 out of 36 total, so 6/36 = 1/6.

Question 197: A racemic mixture has what observed optical rotation?

Strongly negative
Strongly positive
Zero (Correct answer)
Equal to one enantiomer

Correct answer: Zero

Equal amounts of two enantiomers cancel each other's rotation, giving zero.

Question 198: A reliable strategy when two angles seem equal is to first identify which?

The clearly smallest and clearly largest angles (Correct answer)
The angle drawn highest on the page
The angle with the longest rays
The angle with letter A

Correct answer: The clearly smallest and clearly largest angles

Anchoring the extremes narrows the close comparison to the middle two angles.

Question 199: What is the oxidation-state-independent mass of 1.5 mol of Fe2O3 (Fe=56, O=16)?

160 g
240 g (Correct answer)
320 g
80 g

Correct answer: 240 g

Fe2O3 molar mass is 160 g/mol, so 1.5 mol weighs 240 g.

Question 200: Four angles, labeled 1 through 4, are presented. You are to rank these angles from the smallest to the largest.

3, 1, 4, 2 (Correct answer)
2, 4, 1, 3
3, 4, 1, 2
1, 3, 4, 2

Correct answer: 3, 1, 4, 2

The correct order from smallest to largest angle is 3, 1, 4, 2. Angle 3 is the most acute (narrowest), followed by angle 1. Angle 4 is wider than angle 1, and angle 2 is the largest (most open) of the four acute angles presented.

Question 201: If a reaction has a theoretical yield of 50 g and an actual yield of 40 g, what is the percent yield?

90%
10%
80% (Correct answer)
125%

Correct answer: 80%

Percent yield is actual/theoretical × 100 = 40/50 × 100 = 80%.

Question 202: The word 'consequently' in a scientific passage most likely introduces:

A cause
An unrelated example
A result or effect of the preceding statement (Correct answer)
A definition

Correct answer: A result or effect of the preceding statement

'Consequently' signals a result following from a cause.

Question 203: The synthesis of ammonia is represented by the equation: N2(g) + 3H2(g) → 2NH3(g). How many grams of hydrogen gas (H2) are required to produce 68 grams of ammonia (NH3)? (Molar masses: N = 14.0 g/mol, H = 1.0 g/mol)

34 g
4 g
6 g
12 g (Correct answer)

Correct answer: 12 g

First, calculate the molar mass of NH3: 14.0 + 3(1.0) = 17.0 g/mol. Then, convert the mass of NH3 to moles: 68 g NH3 / 17.0 g/mol = 4.0 moles of NH3. According to the balanced equation, 3 moles of H2 are required for every 2 moles of NH3 produced. So, moles of H2 needed = 4.0 moles NH3 * (3 moles H2 / 2 moles NH3) = 6.0 moles of H2. Finally, convert moles of H2 to grams. The molar mass of H2 is 2(1.0) = 2.0 g/mol. Mass of H2 = 6.0 moles H2 * 2.0 g/mol = 12 g.

Question 204: What is the empirical formula of a compound that is 40% C, 6.7% H, and 53.3% O by mass?

CHO
C2H4O2
CH2O (Correct answer)
CH4O

Correct answer: CH2O

Dividing by atomic masses gives a 1:2:1 mole ratio of C:H:O, the formula CH2O.

Question 205: Which gas law states that volume is inversely proportional to pressure at constant temperature?

Avogadro's law
Charles's law
Boyle's law (Correct answer)
Dalton's law

Correct answer: Boyle's law

Boyle's law relates pressure and volume inversely at fixed temperature.

Question 206: How many cubes in Figure A have three of their exposed sides painted?

7
6 (Correct answer)
3
5
4

Correct answer: 6

Cubes with three exposed sides painted are typically the corner cubes of the overall structure. By carefully identifying and counting all the cubes that form an exposed corner of Figure A, it is determined that there are 6 such cubes. These cubes are visible from three distinct sides of the assembled figure.

Question 207: What type of bond holds the two strands of DNA together?

Disulfide bonds
Ionic bonds
Peptide bonds
Hydrogen bonds (Correct answer)

Correct answer: Hydrogen bonds

Complementary bases pair via hydrogen bonds between the strands.

Question 208: In a standard 52-card deck, what is the probability of drawing a single card that is a King or a Spade?

17/52
1/13
1/4
4/13 (Correct answer)

Correct answer: 4/13

This problem involves non-mutually exclusive events because a card can be both a King and a Spade (the King of Spades). The formula is P(A or B) = P(A) + P(B) - P(A and B). P(King) = 4/52. P(Spade) = 13/52. P(King and Spade) = 1/52. Therefore, P(King or Spade) = (4/52) + (13/52) - (1/52) = 16/52. This fraction simplifies to 4/13.

Question 209: SF₄(g) + H₂O(1) → SO₂(g) + 4HF(g) ΔH = -828 kJ/mol Which of the following statements best captures the reaction described above?

This reaction is never thermodynamically favoured
All of the above
The entropy of the reactants exceeds that of the products
The bond strength of the reactants exceeds that of the products (Correct answer)
H2O(l) will always be the limiting reagent

Correct answer: The bond strength of the reactants exceeds that of the products

The reaction has a negative ΔH (-828 kJ/mol), indicating it is an exothermic process. In an exothermic reaction, energy is released because the bonds formed in the products are stronger and more stable than the bonds broken in the reactants. Therefore, the overall bond strength of the products exceeds that of the reactants, meaning more energy is required to break the product bonds than the reactant bonds.

Question 210: What is the maximum number of stereoisomers possible for a molecule with the structure of 3,4-dimethylhexane?

3
8
2
4 (Correct answer)

Correct answer: 4

The maximum number of stereoisomers is calculated by the formula 2^n, where 'n' is the number of chiral centers. 3,4-dimethylhexane has two chiral centers (at C3 and C4). Therefore, the maximum number of stereoisomers is 2^2 = 4. These stereoisomers exist as two pairs of enantiomers.

Question 211: What type of functional group is present in ethanol (CH₃CH₂OH)?

Alcohol (Correct answer)
Ketone
Amine
Ether

Correct answer: Alcohol

Ethanol contains a hydroxyl group (-OH) attached to a carbon chain, classifying it as a primary alcohol.

Question 212: When the cotangent of an angle β is 1, the tangent of the angle β is:

2
3
1 (Correct answer)
-1
0

Correct answer: 1

The tangent and cotangent functions are reciprocals of each other, meaning tan(β) = 1/cot(β). Given that the cotangent of angle β is 1, we can substitute this value into the reciprocal identity. Therefore, tan(β) = 1/1, which simplifies to 1.

Question 213: Three gases are contained in a sealed, rigid container: 28.0 g nitrogen, 40.0 g argon, and 36.0 g water vapour. What is the partial pressure of nitrogen if the total pressure exerted by the gases is 2.0 atm?

2.0 atm
0.40 atm
4.0 atm
0.50 atm (Correct answer)
0.33 atm

Correct answer: 0.50 atm

According to Dalton's Law of Partial Pressures, the partial pressure of a gas is its mole fraction multiplied by the total pressure. First, calculate the moles of each gas: N₂ (28.0 g / 28.0 g/mol = 1.0 mol), Ar (40.0 g / 40.0 g/mol = 1.0 mol), H₂O (36.0 g / 18.0 g/mol = 2.0 mol). The total moles are 1.0 + 1.0 + 2.0 = 4.0 mol. The mole fraction of nitrogen is 1.0 mol / 4.0 mol = 0.25. Therefore, the partial pressure of nitrogen is 0.25 * 2.0 atm = 0.50 atm.

Question 214: What is the passage's major point?

Curcumin can cure liver toxicity.
Anti-inflammatory effects of spices.
Regular use of turmeric is the best way for curing AD.
Curative uses of Turmeric in old and modern medicine. (Correct answer)
Curcumin, a cure for many diseases.

Correct answer: Curative uses of Turmeric in old and modern medicine.

This question refers to a passage about Curcumin that was not provided. Without the relevant text, it is impossible to determine which method of curcumin consumption results in better absorption according to that specific passage. Assuming the provided correct answer, 'consumption with food' would be the method recommended in the missing text for improved absorption.

Question 215: Consider a 2D pattern made of six squares arranged to form a cube. The layout consists of a 2x2 square grid with two additional squares attached: one to the top of the top-left square and one to the right of the top-right square. The faces are marked as follows: Top-left is 'A', top-right is 'B', bottom-left is 'C', bottom-right is 'D'. The square above 'A' is 'E', and the square to the right of 'B' is 'F'. Which of the following views of the folded cube is IMPOSSIBLE?

A view showing faces C, D, and E. (Correct answer)
A view showing faces A, B, and D.
A view showing faces B, D, and F.
A view showing faces A, C, and E.

Correct answer: A view showing faces C, D, and E.

By analyzing the folds, we can determine the opposite faces. If we consider 'C' as the base, 'A' folds up to be the back, and 'D' folds up to be the right side. 'B' then folds over to become the front face. This means 'E' folds over to become the top face, and 'F' becomes the left face. The opposite pairs are: A-D, C-E, and B-F. The impossible view is the one that shows two opposite faces at the same time. Choice B shows faces C and E, which are opposite and thus cannot be seen together.

Question 216: What is the correct ground-state electron configuration of copper (Z = 29)?

[Ar]3d¹⁰4s¹ (Correct answer)
[Ar]3d⁸4s²
[Ar]3d¹⁰4s²
[Ar]3d⁹4s²

Correct answer: [Ar]3d¹⁰4s¹

Copper is an exception to the Aufbau principle; it adopts [Ar]3d¹⁰4s¹ because a fully filled 3d subshell provides extra stability.

Question 217: The following images illustrate top, front, and end perspectives of solid objects. There is no sense of perspective in the sights. That is, the seen surface's points are viewed along parallel lines of vision. In the upper left-hand corner is a projection looking DOWN on it (TOP VIEW). In the lower left-hand corner, you can see a projection looking at the object from the FRONT (FRONT VIEW). In the lower right-hand corner, you can see a projection looking at the object from the END. (END OF VIEW) These sights are always in the same place and are labeled as such. Lines that are not visible on the surface in a certain view are DOTTED in that view. Two views are shown in these problems, with four choices to complete the set. You must choose the correct option. It is not always necessary to select the end view; occasionally the top view or the front view is lacking.

D)
A) (Correct answer)
C)
B)

Correct answer: A)

To complete the set of orthographic projections, analyze the given top and front views to construct a mental image of the three-dimensional object. Then, imagine viewing this object from the end perspective. Option A correctly represents the end view, including all visible and hidden lines (dotted lines) that correspond to the object's structure.

Question 218: What is the absolute configuration (R/S) of the chiral center in (S)-2-chlorobutane?

Z
E
R
S (Correct answer)

Correct answer: S

The question explicitly states the configuration in the IUPAC name. (S)-2-chlorobutane indicates that the chiral center at carbon 2 has the S configuration according to the Cahn-Ingold-Prelog priority rules. This is a direct knowledge question based on interpreting nomenclature.

Question 219: How many of the cubes in Figure have two of their exposed sides painted?

5
1
4
3 (Correct answer)
2

Correct answer: 3

Cubes with two exposed sides painted are typically located along the edges of the overall structure, but not at the corners. By carefully identifying and counting all the cubes in the figure that are exposed on exactly two sides, it is determined that there are 3 such cubes. These cubes are part of an edge but not a vertex of the painted exterior.

Question 220: What is the concentration of a solution with 0.5 mol solute in 250 mL?

2.0 M (Correct answer)
1.0 M
0.25 M
0.5 M

Correct answer: 2.0 M

Molarity is 0.5 mol / 0.250 L = 2.0 M.

Question 221: Hund's rule states that electrons in degenerate orbitals will:

Fill the lowest-energy orbital completely before entering the next
Pair up in the same orbital before occupying empty orbitals
Always have opposite spins regardless of orbital occupancy
Occupy separate orbitals with parallel spins before any pairing (Correct answer)

Correct answer: Occupy separate orbitals with parallel spins before any pairing

Hund's rule states that electrons fill degenerate orbitals singly with parallel spins before any orbital receives a second electron.

Question 222: According to the text, which portion of the turmeric plant is used for medical purposes?

rhizome (Correct answer)
seed
none of the options
leaf
petal

Correct answer: rhizome

This question refers to a passage about Turmeric that was not provided. Without the relevant text, it is impossible to determine which portion of the turmeric plant is used for medical purposes according to that specific passage. Assuming the provided correct answer, 'rhizome' would be the part mentioned in the missing text.

Question 223: A boat travels 40 miles to the south, then 30 miles to the east. What is the boat's distance from its starting point?

70 miles
50 miles (Correct answer)
45 miles
80 miles
60 miles

Correct answer: 50 miles

The boat's journey creates a right-angled triangle, where the 40 miles traveled south and 30 miles traveled east are the two perpendicular legs. The distance from the starting point is the hypotenuse of this triangle. Applying the Pythagorean theorem (a² + b² = c²), we calculate 40² + 30² = 1600 + 900 = 2500. Taking the square root of 2500 gives 50 miles, which is the boat's distance from its starting point.

Question 224: What is the mass of 3.01 × 10^23 atoms of carbon (C=12)?

3 g
12 g
24 g
6 g (Correct answer)

Correct answer: 6 g

3.01 × 10^23 atoms is 0.5 mol, which weighs 0.5 × 12 = 6 g.

Question 225: Examine the four angles provided, labeled 1 through 4, which contain a mix of acute and obtuse types. Your task is to arrange them in ascending order of their measure, from smallest to largest.

4, 1, 2, 3
2, 4, 1, 3
4, 2, 1, 3 (Correct answer)
3, 1, 2, 4

Correct answer: 4, 2, 1, 3

The correct ranking from smallest to largest is 4, 2, 1, 3. Angle 4 is the only acute angle, making it the smallest. Angles 2, 1, and 3 are all obtuse, with angle 2 being the smallest of the three (closest to 90 degrees) and angle 3 being the largest overall (most open).

Question 226: A buffer is most effective when the solution pH is close to:

7.0 for all buffers
14
The pKa of the weak acid component (Correct answer)
The numerical value of Ka

Correct answer: The pKa of the weak acid component

A buffer provides maximum buffering capacity when pH is within ±1 unit of the weak acid's pKa.

Question 227: Which structure in plant cells is responsible for photosynthesis?

Mitochondrion
Vacuole
Nucleus
Chloroplast (Correct answer)

Correct answer: Chloroplast

Chloroplasts contain chlorophyll and carry out photosynthesis.

Question 228: The Henderson-Hasselbalch equation for a buffer is: pH =

Ka × [HA]/[A⁻]
log([HA] + [A⁻])
pKa − log([HA]/[A⁻])
pKa + log([A⁻]/[HA]) (Correct answer)

Correct answer: pKa + log([A⁻]/[HA])

The Henderson-Hasselbalch equation pH = pKa + log([A⁻]/[HA]) relates buffer pH to the pKa and ratio of conjugate base to weak acid.

Question 229: In 12 seconds, a 300-meter train goes through a lamp post. What is the time it takes to cross a 450-meter bridge?

45 seconds
75 seconds
60 seconds
15 seconds
30 seconds (Correct answer)

Correct answer: 30 seconds

First, calculate the train's speed. When passing a lamp post, the distance covered is the train's length (300m), so speed = 300m / 12s = 25 m/s. To cross a bridge, the train must travel its own length plus the bridge's length. Thus, the total distance is 300m + 450m = 750m. Finally, divide this total distance by the train's speed to find the time taken: 750m / 25 m/s = 30 seconds.

Question 230: High-energy photons hit neutral chlorine atoms, forcing electrons to expel from the various filled subshells. After being ejected, which subshell's electrons would have the maximum velocity?

2S
3p (Correct answer)
3d
2p
1s

Correct answer: 3p

When high-energy photons eject electrons from an atom, the kinetic energy of the ejected electron is equal to the photon's energy minus the electron's binding energy. Electrons in higher energy subshells (further from the nucleus) have lower binding energies. Therefore, for a given photon energy, electrons ejected from the outermost subshell (3p in chlorine) will have the lowest binding energy and thus the highest kinetic energy and maximum velocity.

Question 231: When mapping a passage, noting the role of each paragraph helps you:

Skip the conclusion
Quickly find the right section for detail questions (Correct answer)
Avoid reading the questions
Memorize the whole passage

Correct answer: Quickly find the right section for detail questions

Knowing each paragraph's function speeds up locating details.

Question 232: Which quantum number is restricted to values of +½ or −½?

Principal quantum number (n)
Magnetic quantum number (mₗ)
Spin quantum number (mₛ) (Correct answer)
Angular momentum quantum number (l)

Correct answer: Spin quantum number (mₛ)

The spin quantum number (mₛ) has only two allowed values — +½ (spin up) or −½ (spin down) — representing the two intrinsic spin states of an electron.

Question 233: What exactly is the neuropathological process of Alzheimer's disease?

All of the options (Correct answer)
Plaque accumulation of abnormally folded amyloid protein in the brain.
Increase of macrophages in the cerebral vessel wall
Wasting away from parts of the brain.
Neural loss in the temporoparietal of the brain.

Correct answer: All of the options

Alzheimer's disease is a complex neurodegenerative disorder characterized by multiple pathological processes. These include neural loss (C), accumulation of abnormally folded amyloid protein plaques (D), and overall brain atrophy (E). While macrophages (B) are involved in the inflammatory response, all listed options contribute to the neuropathological changes seen in Alzheimer's disease, making 'All of the options' the correct answer.

Question 234: What common visual illusion can make a larger angle appear smaller?

An angle with short rays may look more closed than one with long rays (Correct answer)
Vertical angles look bigger than horizontal ones
Bright lines always look wider
Angles near the page edge look smaller

Correct answer: An angle with short rays may look more closed than one with long rays

Short rays can trick the eye into perceiving a tighter opening even when the spread is larger.

Question 235: Which of the following is NOT a possible long-term complication of anorexia nervosa, according to the passage? [1) Eating disorders impact 24 million people in the United States and 70 million worldwide. These disorders go beyond normal dieting and involve extreme behavior related to food or exercise, such as starvation and binge eating. In the past few decades, eating disorders have become a major health crisis and can lead to serious com plications or even fatalities if left untreated. [2) Anorexia nervosa is one of the most well—known eating disorders and is also one of the deadliest. People with this disease, known as anorexics, have an intense fear of gaining weight. They develop a distorted body image which prevents them from correctly evaluating their body size and shape. Anorexics believe they are overweight even when they are normal weight or even grossly underweight. When they look in the mirror, the image they see is not a true reflection of their appearance. As a result, they go to extreme lengths to lose pounds and typically starve themselves, until they become thinner and thinner. Many drop so much weight they develop a malnourished, emaciated appearance. Anorexics are often perfectionists who feel the disorder helps them gain control over their lives, when in fact, just the opposite occurs. [3) Most people who develop anorexia nervosa are young and female. About 1 out of 100 girls and women currently suffer from it. In the past, few young men and older adults got this disease. However, those numbers have been increasing. This is particularly true for male athletes or young men in the military, who feel driven to be thin and in shape. Males now make up 25% of all sufferers. Anorexia also used to be more common among European Americans, but that’s changing too. Occurrences are rapidly rising among other ethnic groups. What Are the Causes? (4) There is no specific cause of anorexia nervosa. Like other eating disorders, it is a mental illness that arises from a combination of circumstances. Biological, emotional, and psychological factors work together to bring about this disease. While anorexia involves a preoccupation with food, the underlying issues are about much more than that. People with eating disorders use food and exercise to cope with painful emotions or situations in other areas of their lives. [5) Many different factors can contribute to the disorder. Anorexia nervosa often runs in families and current research suggests there could be a genetic link. Feelings of low self—esteem and inadequacy are also two big contributors to this disease. A lack of control over one‘s life and a history of substance abuse can play a part as well. Other psychological factors include depression, anxiety and obsessive compulsive disorder. Many sufferers are perfectionists who feel the need to control every aspect of their lives. [6) Social causes, such as troubled ties with family members or friends, are often to blame as well. They also include pressures from society to look thin and attractive. Success and self-worth are often equated with a slender appearance. Other social causes include a history of being teased by peers because of body size. (7) There are several risk factors associated with anorexia. They include an early onset of puberty, participation in sports or other activities that place a premium on having a lean body, difficulty dealing with stress, regular dieting, and a history of physical or sexual abuse. Risk factors are not a guarantee that a person will become anorexic. Some young women who attend ballet classes and have problems with stress, for example, are more likely to get anorexia. However, others with the same risk factors cope just fine. Risk factors can play a part, but they don’t always lead to anorexia. [8} Researchers are still learning about all the underlying issues that can contribute to anorexia nervosa. For example, they‘re studying possible biochemical causes. Some researchers are studying the possible effects of serotonin, a brain chemical that regulates mood and appetite. Serotonin levels have been found to be out of balance in a percentage of individuals with anorexia or other eating disorders. What Are the Symptoms? [9} Most people with anorexia nervosa see themselves as overweight when they are actually underweight. They are obsessed with dropping pounds and do everything they can to lose weight. As a result, they often engage in purging behavior, which can include self-induced vomiting, along with a use of laxatives, diuretics, and/or enem as. [10} This can lead to a variety of short—term side effects and long—term com plications. Some of the short—term symptoms include brittle nails and hair, cold or swollen hands and feet, constipation, dry skin with a yellowish cast, lethargy, and a lack of menstruation. Other side effects can last for a longer period of time and be harder to overcome. Without treatment, anorexics could suffer from malnutrition, heart problems, bone disease and other dangerous com plications. Some of these effects continue to take a physical toll long after the disease has been treated and cured. Unfortunately, death is another com plication of anorexia and about 20% of the people with this disorder die prematurely. The side effects that most commonly prove fatal include fluid imbalances and cardiac arrest. Suicide is another com plication often linked to the disease. How Is It Diagnosed? [11) There are two types of anorexia nervosa physicians consider when making a diagnosis. Patients who suffer from the binging/purging type regularly engage in binging behavior, or eating a lot of food in a short period of time, that is soon followed by purging. Patients who suffer from the restricting type of anorexia do not engage in binging and purging, but instead continually deny their bodies the nutrients they need. To determine if a person has either type, doctors question patients about eating habits and behaviors. They also perform exams, take x—rays and other scans and do blood and urine tests. Most importantly, they consult a medical handbook, known as the Diagnostic and Statistical Manual of Mental Disorders, which has a list of criteria for each eating disorder. Even if a patient does not meet all the criteria, a doctor may be concerned enough to begin a course of treatment. [12) Another method that can determine if a person has anorexia nervosa is to measure the patient‘s BMI, or body mass index. This is the answer to a mathematical formula that factors in weight and height. For example, if you weigh 135 lbs. and stand 63 inches tall your BMI is 24. For an individual who is at a normal weight, BMI typically measures between 18.5 and 24.9. If it drops below that, a person is considered underweight and could have anorexia or other another eating disorder. How Is It Treated? [13) According to the National Eating Disorders Association, only one third of the people with anorexia receive the treatment they need. In general, the most important aspect of curing the disease is stopping starvation and returning the patient to a healthy appearance. Treating anorexia nervosa involves three major steps. The first involves restoring the patient to a healthy weight. To do this, anorexics often must be hospitalized, particularly if their weight has become dangerously low. Since malnutrition and a low body weight can impede a person‘s ability to think clearly, anorexics also need to gain weight to move on to the next phases of their treatment. [14) During the second step, doctors treat the psychological issues that led to the disorder. This can involve one or more forms of therapy. Cognitive therapy is a form of treatment that focuses on how a person thinks and feels. This part of the treatment process helps anorexics change how they see themselves and adjust distorted body images. The purpose of behavioral therapy is to alter the self—destructive behaviors of anorexia, including starvation and purging. During sessions, the patient may list alternatives to those behaviors or ways to avoid them. During interpersonal therapy, the doctor addresses the patient‘s relationships with others. He or she may discuss unhealthy or harmful relationships while suggesting coping strategies. [15) In the third step, patients learn healthy behaviors related to eating and exercise. This involves another type of treatment known as nutritional therapy. Patients learn about the importance of eating a balanced diet and exercising in a healthy way. The use of medications can also be a part of a patient’s treatment plan and help adjust symptoms related to mood and anxiety. One or more of the following may be prescribed: antidepressants, antipsychotics, mood stabilizers, hormones to restore menstrual cycle, and dietary supplements. However, some studies suggest medications won‘t prevent an anorexic from relapsing. [16) Unfortunately, there is no entirely effective treatment for anorexia and recovery could last years. Even after gaining weight, anorexics may remain thinner than average. Often, they display healthy behavior toward food for months at a time then suddenly relapse. Involving family members and friends can help with the adjustment and be a big advantage in the recovery process. However, long—term studies suggest that about half of all patients never fully recover. [17) Eating disorders don’t only impact the people who suffer from them. They also have a profound impact on friends and family members. For them, it can often feel as though the patient‘s relationship with his or her eating disorder takes precedence over all other relationships. Parents and siblings of an anorexic often spend a great deal of time and energy worrying about him or her, or cajoling the person to seek help or change the behavior. As a result, living with someone who has an eating disorder can be a painful process, even during the road to recovery. Therefore, treatment plans often include counseling sessions for family members and close friends. This can go a long way toward repairing damaged relationships. [18) For average anorexics, the disease lasts less than two years, which is a shorter time period than other eating disorders. It is unclear, however, what could attribute to this fact. Anecdotal evidence suggests anorexics may be reluctant to participate in research studies, which could skew the results. Can It Be Prevented? [19) The best way to prevent anorexia nervosa is to develop healthy attitudes toward food and exercise at a young age. Parents in particular can encourage and reinforce this type of behavior in a number of ways. Talk to your child about social pressures to be thin, set a good example with your own eating habits, and accept and support your child in all facets of life. Pediatricians can also help identify anorexia nervosa early. They can inquire about eating habits and check for weight fluctuations, for example. Identifying a disorder early can go a long way toward preventing com plications and speeding the recovery process. [20) However, there is no sure way to prevent this kind of disorder. Outside pressures from peers or cultural influences often have as much of an impact as experiences in the home. Therefore, it is important for parents to keep an eye on their kids, watch how they eat and observe their attitudes toward food and their bodies, to ensure they remain healthy and happy. [21) If you are concerned someone you know may have anorexia, there are steps you can take to help him or her. If you see the warning signs of an eating disorder in a friend or family member, don‘t think it‘s all in your head or try to brush the problem under a rug. It is very likely the person is in denial about the disease, and if you don't approach him or her the situation could become worse. Although it can be difficult to bring up such a delicate subject, talking about it can only help and is the first step toward a positive outcome. [22) Even if the person gets angry or defensive, don‘t give up. Try to approach him or her at a later time when you've both had a chance to calm down and regroup. It could take several attempts before he or she is ready to listen. Also, anorexics often deny their behavior and at times don‘t even realize they have a disease. Remember that pushing, lecturing or blaming won‘t help. Always make it clear you’re only concerned about the person and have his or her best interests at heart. The best thing you can do for a person with anorexia nervosa is to encourage him or her to seek professional help. Eating disorders are mental illnesses that won‘t go away on their own. They must be appropriately diagnosed and properly treated.

Heart problems
None of the options
Malnutrition
Bone disease
Lack of menstruation (Correct answer)

Correct answer: Lack of menstruation

The author would likely disagree with all the provided options. Paragraph 20 states that outside pressures have as much impact as home experiences, refuting A. Paragraph 16 indicates only about half of patients fully recover, refuting B. Paragraph 16 and 17 emphasize the advantage of family involvement in treatment, refuting C. Finally, paragraph 22 explains that anorexics often deny their behavior and may take multiple attempts to listen, refuting E. Therefore, none of the options align with the author's likely agreement.

Question 236: Calculate the distance between the point of intersection of the lines x — y = 2 and y = 4 and the point (6,3).

√2
2√2
2
3√2
1 (Correct answer)

Correct answer: 1

First, find the intersection point of the lines x - y = 2 and y = 4. Substitute y=4 into the first equation: x - 4 = 2, which gives x = 6. So, the intersection point is (6, 4). Next, calculate the distance between this point (6, 4) and the given point (6, 3) using the distance formula: d = √[(6-6)² + (3-4)²] = √[0² + (-1)²] = √1 = 1. Therefore, the distance is 1.

Question 237: Which part of the neuron receives signals from other neurons?

Dendrites (Correct answer)
Myelin sheath
Axon
Synaptic terminal

Correct answer: Dendrites

Dendrites receive incoming signals and conduct them toward the cell body.

Question 238: Oxidation of a primary alcohol produces which compound?

A carboxylic acid directly
An aldehyde (Correct answer)
A ketone
An ether

Correct answer: An aldehyde

Mild oxidation of a primary alcohol produces an aldehyde; further oxidation yields a carboxylic acid.

Question 239: An arrow on one face points toward an adjacent face's shared edge; after folding the arrow:

Vanishes
Points away from the solid
Points into that neighboring face (Correct answer)
Reverses direction

Correct answer: Points into that neighboring face

Direction is preserved relative to the shared edge, so the arrow aims at the neighbor.

Question 240: Which of the following statements most accurately represents the passage's fundamental thesis? [1) Eating disorders impact 24 million people in the United States and 70 million worldwide. These disorders go beyond normal dieting and involve extreme behavior related to food or exercise, such as starvation and binge eating. In the past few decades, eating disorders have become a major health crisis and can lead to serious com plications or even fatalities if left untreated. [2) Anorexia nervosa is one of the most well—known eating disorders and is also one of the deadliest. People with this disease, known as anorexics, have an intense fear of gaining weight. They develop a distorted body image which prevents them from correctly evaluating their body size and shape. Anorexics believe they are overweight even when they are normal weight or even grossly underweight. When they look in the mirror, the image they see is not a true reflection of their appearance. As a result, they go to extreme lengths to lose pounds and typically starve themselves, until they become thinner and thinner. Many drop so much weight they develop a malnourished, emaciated appearance. Anorexics are often perfectionists who feel the disorder helps them gain control over their lives, when in fact, just the opposite occurs. [3) Most people who develop anorexia nervosa are young and female. About 1 out of 100 girls and women currently suffer from it. In the past, few young men and older adults got this disease. However, those numbers have been increasing. This is particularly true for male athletes or young men in the military, who feel driven to be thin and in shape. Males now make up 25% of all sufferers. Anorexia also used to be more common among European Americans, but that’s changing too. Occurrences are rapidly rising among other ethnic groups. What Are the Causes? (4) There is no specific cause of anorexia nervosa. Like other eating disorders, it is a mental illness that arises from a combination of circumstances. Biological, emotional, and psychological factors work together to bring about this disease. While anorexia involves a preoccupation with food, the underlying issues are about much more than that. People with eating disorders use food and exercise to cope with painful emotions or situations in other areas of their lives. [5) Many different factors can contribute to the disorder. Anorexia nervosa often runs in families and current research suggests there could be a genetic link. Feelings of low self—esteem and inadequacy are also two big contributors to this disease. A lack of control over one‘s life and a history of substance abuse can play a part as well. Other psychological factors include depression, anxiety and obsessive compulsive disorder. Many sufferers are perfectionists who feel the need to control every aspect of their lives. [6) Social causes, such as troubled ties with family members or friends, are often to blame as well. They also include pressures from society to look thin and attractive. Success and self-worth are often equated with a slender appearance. Other social causes include a history of being teased by peers because of body size. (7) There are several risk factors associated with anorexia. They include an early onset of puberty, participation in sports or other activities that place a premium on having a lean body, difficulty dealing with stress, regular dieting, and a history of physical or sexual abuse. Risk factors are not a guarantee that a person will become anorexic. Some young women who attend ballet classes and have problems with stress, for example, are more likely to get anorexia. However, others with the same risk factors cope just fine. Risk factors can play a part, but they don’t always lead to anorexia. [8} Researchers are still learning about all the underlying issues that can contribute to anorexia nervosa. For example, they‘re studying possible biochemical causes. Some researchers are studying the possible effects of serotonin, a brain chemical that regulates mood and appetite. Serotonin levels have been found to be out of balance in a percentage of individuals with anorexia or other eating disorders. What Are the Symptoms? [9} Most people with anorexia nervosa see themselves as overweight when they are actually underweight. They are obsessed with dropping pounds and do everything they can to lose weight. As a result, they often engage in purging behavior, which can include self-induced vomiting, along with a use of laxatives, diuretics, and/or enem as. [10} This can lead to a variety of short—term side effects and long—term com plications. Some of the short—term symptoms include brittle nails and hair, cold or swollen hands and feet, constipation, dry skin with a yellowish cast, lethargy, and a lack of menstruation. Other side effects can last for a longer period of time and be harder to overcome. Without treatment, anorexics could suffer from malnutrition, heart problems, bone disease and other dangerous com plications. Some of these effects continue to take a physical toll long after the disease has been treated and cured. Unfortunately, death is another com plication of anorexia and about 20% of the people with this disorder die prematurely. The side effects that most commonly prove fatal include fluid imbalances and cardiac arrest. Suicide is another com plication often linked to the disease. How Is It Diagnosed? [11) There are two types of anorexia nervosa physicians consider when making a diagnosis. Patients who suffer from the binging/purging type regularly engage in binging behavior, or eating a lot of food in a short period of time, that is soon followed by purging. Patients who suffer from the restricting type of anorexia do not engage in binging and purging, but instead continually deny their bodies the nutrients they need. To determine if a person has either type, doctors question patients about eating habits and behaviors. They also perform exams, take x—rays and other scans and do blood and urine tests. Most importantly, they consult a medical handbook, known as the Diagnostic and Statistical Manual of Mental Disorders, which has a list of criteria for each eating disorder. Even if a patient does not meet all the criteria, a doctor may be concerned enough to begin a course of treatment. [12) Another method that can determine if a person has anorexia nervosa is to measure the patient‘s BMI, or body mass index. This is the answer to a mathematical formula that factors in weight and height. For example, if you weigh 135 lbs. and stand 63 inches tall your BMI is 24. For an individual who is at a normal weight, BMI typically measures between 18.5 and 24.9. If it drops below that, a person is considered underweight and could have anorexia or other another eating disorder. How Is It Treated? [13) According to the National Eating Disorders Association, only one third of the people with anorexia receive the treatment they need. In general, the most important aspect of curing the disease is stopping starvation and returning the patient to a healthy appearance. Treating anorexia nervosa involves three major steps. The first involves restoring the patient to a healthy weight. To do this, anorexics often must be hospitalized, particularly if their weight has become dangerously low. Since malnutrition and a low body weight can impede a person‘s ability to think clearly, anorexics also need to gain weight to move on to the next phases of their treatment. [14) During the second step, doctors treat the psychological issues that led to the disorder. This can involve one or more forms of therapy. Cognitive therapy is a form of treatment that focuses on how a person thinks and feels. This part of the treatment process helps anorexics change how they see themselves and adjust distorted body images. The purpose of behavioral therapy is to alter the self—destructive behaviors of anorexia, including starvation and purging. During sessions, the patient may list alternatives to those behaviors or ways to avoid them. During interpersonal therapy, the doctor addresses the patient‘s relationships with others. He or she may discuss unhealthy or harmful relationships while suggesting coping strategies. [15) In the third step, patients learn healthy behaviors related to eating and exercise. This involves another type of treatment known as nutritional therapy. Patients learn about the importance of eating a balanced diet and exercising in a healthy way. The use of medications can also be a part of a patient’s treatment plan and help adjust symptoms related to mood and anxiety. One or more of the following may be prescribed: antidepressants, antipsychotics, mood stabilizers, hormones to restore menstrual cycle, and dietary supplements. However, some studies suggest medications won‘t prevent an anorexic from relapsing. [16) Unfortunately, there is no entirely effective treatment for anorexia and recovery could last years. Even after gaining weight, anorexics may remain thinner than average. Often, they display healthy behavior toward food for months at a time then suddenly relapse. Involving family members and friends can help with the adjustment and be a big advantage in the recovery process. However, long—term studies suggest that about half of all patients never fully recover. [17) Eating disorders don’t only impact the people who suffer from them. They also have a profound impact on friends and family members. For them, it can often feel as though the patient‘s relationship with his or her eating disorder takes precedence over all other relationships. Parents and siblings of an anorexic often spend a great deal of time and energy worrying about him or her, or cajoling the person to seek help or change the behavior. As a result, living with someone who has an eating disorder can be a painful process, even during the road to recovery. Therefore, treatment plans often include counseling sessions for family members and close friends. This can go a long way toward repairing damaged relationships. [18) For average anorexics, the disease lasts less than two years, which is a shorter time period than other eating disorders. It is unclear, however, what could attribute to this fact. Anecdotal evidence suggests anorexics may be reluctant to participate in research studies, which could skew the results. Can It Be Prevented? [19) The best way to prevent anorexia nervosa is to develop healthy attitudes toward food and exercise at a young age. Parents in particular can encourage and reinforce this type of behavior in a number of ways. Talk to your child about social pressures to be thin, set a good example with your own eating habits, and accept and support your child in all facets of life. Pediatricians can also help identify anorexia nervosa early. They can inquire about eating habits and check for weight fluctuations, for example. Identifying a disorder early can go a long way toward preventing com plications and speeding the recovery process. [20) However, there is no sure way to prevent this kind of disorder. Outside pressures from peers or cultural influences often have as much of an impact as experiences in the home. Therefore, it is important for parents to keep an eye on their kids, watch how they eat and observe their attitudes toward food and their bodies, to ensure they remain healthy and happy. [21) If you are concerned someone you know may have anorexia, there are steps you can take to help him or her. If you see the warning signs of an eating disorder in a friend or family member, don‘t think it‘s all in your head or try to brush the problem under a rug. It is very likely the person is in denial about the disease, and if you don't approach him or her the situation could become worse. Although it can be difficult to bring up such a delicate subject, talking about it can only help and is the first step toward a positive outcome. [22) Even if the person gets angry or defensive, don‘t give up. Try to approach him or her at a later time when you've both had a chance to calm down and regroup. It could take several attempts before he or she is ready to listen. Also, anorexics often deny their behavior and at times don‘t even realize they have a disease. Remember that pushing, lecturing or blaming won‘t help. Always make it clear you’re only concerned about the person and have his or her best interests at heart. The best thing you can do for a person with anorexia nervosa is to encourage him or her to seek professional help. Eating disorders are mental illnesses that won‘t go away on their own. They must be appropriately diagnosed and properly treated.

Anorexia nervosa typically develops in girls and young women, although the disorder is increasingly becoming com mon in young men as well.
Anorexia nervosa could result from genetics or biochemical imbalances and researchers are currently investigating both possibilities.
Anorexia nervosa is a deadly disease that results in m ore fatalities than any other eating disorder.
Anorexia nervosa can be difficult to recover from and it can take years for patients to heal and avoid relapses.
Anorexia nervosa is characterized by a distorted body image which can lead sufferers to undergo extreme measures to lose weight. (Correct answer)

Correct answer: Anorexia nervosa is characterized by a distorted body image which can lead sufferers to undergo extreme measures to lose weight.

The passage's fundamental thesis is introduced and elaborated upon in paragraph 2, which defines anorexia nervosa. It highlights the core characteristic of the disease: a distorted body image leading sufferers to extreme measures to lose weight. This central idea underpins the subsequent discussions about causes, symptoms, diagnosis, and treatment throughout the text.

Question 241: Which of the following statements challenges one of the passage's assertions? [1) Eating disorders impact 24 million people in the United States and 70 million worldwide. These disorders go beyond normal dieting and involve extreme behavior related to food or exercise, such as starvation and binge eating. In the past few decades, eating disorders have become a major health crisis and can lead to serious com plications or even fatalities if left untreated. [2) Anorexia nervosa is one of the most well—known eating disorders and is also one of the deadliest. People with this disease, known as anorexics, have an intense fear of gaining weight. They develop a distorted body image which prevents them from correctly evaluating their body size and shape. Anorexics believe they are overweight even when they are normal weight or even grossly underweight. When they look in the mirror, the image they see is not a true reflection of their appearance. As a result, they go to extreme lengths to lose pounds and typically starve themselves, until they become thinner and thinner. Many drop so much weight they develop a malnourished, emaciated appearance. Anorexics are often perfectionists who feel the disorder helps them gain control over their lives, when in fact, just the opposite occurs. [3) Most people who develop anorexia nervosa are young and female. About 1 out of 100 girls and women currently suffer from it. In the past, few young men and older adults got this disease. However, those numbers have been increasing. This is particularly true for male athletes or young men in the military, who feel driven to be thin and in shape. Males now make up 25% of all sufferers. Anorexia also used to be more common among European Americans, but that’s changing too. Occurrences are rapidly rising among other ethnic groups. What Are the Causes? (4) There is no specific cause of anorexia nervosa. Like other eating disorders, it is a mental illness that arises from a combination of circumstances. Biological, emotional, and psychological factors work together to bring about this disease. While anorexia involves a preoccupation with food, the underlying issues are about much more than that. People with eating disorders use food and exercise to cope with painful emotions or situations in other areas of their lives. [5) Many different factors can contribute to the disorder. Anorexia nervosa often runs in families and current research suggests there could be a genetic link. Feelings of low self—esteem and inadequacy are also two big contributors to this disease. A lack of control over one‘s life and a history of substance abuse can play a part as well. Other psychological factors include depression, anxiety and obsessive compulsive disorder. Many sufferers are perfectionists who feel the need to control every aspect of their lives. [6) Social causes, such as troubled ties with family members or friends, are often to blame as well. They also include pressures from society to look thin and attractive. Success and self-worth are often equated with a slender appearance. Other social causes include a history of being teased by peers because of body size. (7) There are several risk factors associated with anorexia. They include an early onset of puberty, participation in sports or other activities that place a premium on having a lean body, difficulty dealing with stress, regular dieting, and a history of physical or sexual abuse. Risk factors are not a guarantee that a person will become anorexic. Some young women who attend ballet classes and have problems with stress, for example, are more likely to get anorexia. However, others with the same risk factors cope just fine. Risk factors can play a part, but they don’t always lead to anorexia. [8} Researchers are still learning about all the underlying issues that can contribute to anorexia nervosa. For example, they‘re studying possible biochemical causes. Some researchers are studying the possible effects of serotonin, a brain chemical that regulates mood and appetite. Serotonin levels have been found to be out of balance in a percentage of individuals with anorexia or other eating disorders. What Are the Symptoms? [9} Most people with anorexia nervosa see themselves as overweight when they are actually underweight. They are obsessed with dropping pounds and do everything they can to lose weight. As a result, they often engage in purging behavior, which can include self-induced vomiting, along with a use of laxatives, diuretics, and/or enem as. [10} This can lead to a variety of short—term side effects and long—term com plications. Some of the short—term symptoms include brittle nails and hair, cold or swollen hands and feet, constipation, dry skin with a yellowish cast, lethargy, and a lack of menstruation. Other side effects can last for a longer period of time and be harder to overcome. Without treatment, anorexics could suffer from malnutrition, heart problems, bone disease and other dangerous com plications. Some of these effects continue to take a physical toll long after the disease has been treated and cured. Unfortunately, death is another com plication of anorexia and about 20% of the people with this disorder die prematurely. The side effects that most commonly prove fatal include fluid imbalances and cardiac arrest. Suicide is another com plication often linked to the disease. How Is It Diagnosed? [11) There are two types of anorexia nervosa physicians consider when making a diagnosis. Patients who suffer from the binging/purging type regularly engage in binging behavior, or eating a lot of food in a short period of time, that is soon followed by purging. Patients who suffer from the restricting type of anorexia do not engage in binging and purging, but instead continually deny their bodies the nutrients they need. To determine if a person has either type, doctors question patients about eating habits and behaviors. They also perform exams, take x—rays and other scans and do blood and urine tests. Most importantly, they consult a medical handbook, known as the Diagnostic and Statistical Manual of Mental Disorders, which has a list of criteria for each eating disorder. Even if a patient does not meet all the criteria, a doctor may be concerned enough to begin a course of treatment. [12) Another method that can determine if a person has anorexia nervosa is to measure the patient‘s BMI, or body mass index. This is the answer to a mathematical formula that factors in weight and height. For example, if you weigh 135 lbs. and stand 63 inches tall your BMI is 24. For an individual who is at a normal weight, BMI typically measures between 18.5 and 24.9. If it drops below that, a person is considered underweight and could have anorexia or other another eating disorder. How Is It Treated? [13) According to the National Eating Disorders Association, only one third of the people with anorexia receive the treatment they need. In general, the most important aspect of curing the disease is stopping starvation and returning the patient to a healthy appearance. Treating anorexia nervosa involves three major steps. The first involves restoring the patient to a healthy weight. To do this, anorexics often must be hospitalized, particularly if their weight has become dangerously low. Since malnutrition and a low body weight can impede a person‘s ability to think clearly, anorexics also need to gain weight to move on to the next phases of their treatment. [14) During the second step, doctors treat the psychological issues that led to the disorder. This can involve one or more forms of therapy. Cognitive therapy is a form of treatment that focuses on how a person thinks and feels. This part of the treatment process helps anorexics change how they see themselves and adjust distorted body images. The purpose of behavioral therapy is to alter the self—destructive behaviors of anorexia, including starvation and purging. During sessions, the patient may list alternatives to those behaviors or ways to avoid them. During interpersonal therapy, the doctor addresses the patient‘s relationships with others. He or she may discuss unhealthy or harmful relationships while suggesting coping strategies. [15) In the third step, patients learn healthy behaviors related to eating and exercise. This involves another type of treatment known as nutritional therapy. Patients learn about the importance of eating a balanced diet and exercising in a healthy way. The use of medications can also be a part of a patient’s treatment plan and help adjust symptoms related to mood and anxiety. One or more of the following may be prescribed: antidepressants, antipsychotics, mood stabilizers, hormones to restore menstrual cycle, and dietary supplements. However, some studies suggest medications won‘t prevent an anorexic from relapsing. [16) Unfortunately, there is no entirely effective treatment for anorexia and recovery could last years. Even after gaining weight, anorexics may remain thinner than average. Often, they display healthy behavior toward food for months at a time then suddenly relapse. Involving family members and friends can help with the adjustment and be a big advantage in the recovery process. However, long—term studies suggest that about half of all patients never fully recover. [17) Eating disorders don’t only impact the people who suffer from them. They also have a profound impact on friends and family members. For them, it can often feel as though the patient‘s relationship with his or her eating disorder takes precedence over all other relationships. Parents and siblings of an anorexic often spend a great deal of time and energy worrying about him or her, or cajoling the person to seek help or change the behavior. As a result, living with someone who has an eating disorder can be a painful process, even during the road to recovery. Therefore, treatment plans often include counseling sessions for family members and close friends. This can go a long way toward repairing damaged relationships. [18) For average anorexics, the disease lasts less than two years, which is a shorter time period than other eating disorders. It is unclear, however, what could attribute to this fact. Anecdotal evidence suggests anorexics may be reluctant to participate in research studies, which could skew the results. Can It Be Prevented? [19) The best way to prevent anorexia nervosa is to develop healthy attitudes toward food and exercise at a young age. Parents in particular can encourage and reinforce this type of behavior in a number of ways. Talk to your child about social pressures to be thin, set a good example with your own eating habits, and accept and support your child in all facets of life. Pediatricians can also help identify anorexia nervosa early. They can inquire about eating habits and check for weight fluctuations, for example. Identifying a disorder early can go a long way toward preventing com plications and speeding the recovery process. [20) However, there is no sure way to prevent this kind of disorder. Outside pressures from peers or cultural influences often have as much of an impact as experiences in the home. Therefore, it is important for parents to keep an eye on their kids, watch how they eat and observe their attitudes toward food and their bodies, to ensure they remain healthy and happy. [21) If you are concerned someone you know may have anorexia, there are steps you can take to help him or her. If you see the warning signs of an eating disorder in a friend or family member, don‘t think it‘s all in your head or try to brush the problem under a rug. It is very likely the person is in denial about the disease, and if you don't approach him or her the situation could become worse. Although it can be difficult to bring up such a delicate subject, talking about it can only help and is the first step toward a positive outcome. [22) Even if the person gets angry or defensive, don‘t give up. Try to approach him or her at a later time when you've both had a chance to calm down and regroup. It could take several attempts before he or she is ready to listen. Also, anorexics often deny their behavior and at times don‘t even realize they have a disease. Remember that pushing, lecturing or blaming won‘t help. Always make it clear you’re only concerned about the person and have his or her best interests at heart. The best thing you can do for a person with anorexia nervosa is to encourage him or her to seek professional help. Eating disorders are mental illnesses that won‘t go away on their own. They must be appropriately diagnosed and properly treated.

Anorexics believe they are heavyset even when their weight is in the normal range or is below normal.
Two of the risk factors associated with anorexia nervosa include the early onset of puberty and a history of sexual abuse.
Societal and cultural pressures, such as equating thinness with self worth, can often trigger anorexia and other eating disorders.
Anorexics who fall into the restricting type usually overeat and then purge all the food they consumed soon after. (Correct answer)
Although anorexics tend to be Caucasian, the disease is becoming more com mon among other ethnicities.

Correct answer: Anorexics who fall into the restricting type usually overeat and then purge all the food they consumed soon after.

Paragraph 10 distinguishes between short-term symptoms and long-term complications. It lists "a lack of menstruation" as one of the "short-term symptoms." In contrast, malnutrition, heart problems, and bone disease are explicitly mentioned as long-term complications. Therefore, lack of menstruation is not a possible long-term complication according to the passage, but rather a short-term one.

Question 242: Involuntary muscles that do not contain striations are referred to as

skeletal muscle
smooth muscle (Correct answer)
autonomic muscle
cardiac muscle
cerebral muscle

Correct answer: smooth muscle

Smooth muscle is a type of muscle tissue found in the walls of internal organs like the stomach, intestines, bladder, and blood vessels. It is characterized by its involuntary control, meaning its contractions are not consciously directed, and the absence of striations (bands) when viewed under a microscope. Cardiac muscle is also involuntary but is striated, while skeletal muscle is voluntary and striated.

Question 243: In the 3D Form Development (Pattern Folding) subtest, a flat pattern is folded to form what?

A three-dimensional solid object (Correct answer)
A two-dimensional shadow
A line graph
A flat collage

Correct answer: A three-dimensional solid object

The unfolded pattern is mentally folded along its edges to create a 3D figure.

Question 244: Which adjective best reflects the impact of anorexia on family members of patients, according to the passage? [1) Eating disorders impact 24 million people in the United States and 70 million worldwide. These disorders go beyond normal dieting and involve extreme behavior related to food or exercise, such as starvation and binge eating. In the past few decades, eating disorders have become a major health crisis and can lead to serious com plications or even fatalities if left untreated. [2) Anorexia nervosa is one of the most well—known eating disorders and is also one of the deadliest. People with this disease, known as anorexics, have an intense fear of gaining weight. They develop a distorted body image which prevents them from correctly evaluating their body size and shape. Anorexics believe they are overweight even when they are normal weight or even grossly underweight. When they look in the mirror, the image they see is not a true reflection of their appearance. As a result, they go to extreme lengths to lose pounds and typically starve themselves, until they become thinner and thinner. Many drop so much weight they develop a malnourished, emaciated appearance. Anorexics are often perfectionists who feel the disorder helps them gain control over their lives, when in fact, just the opposite occurs. [3) Most people who develop anorexia nervosa are young and female. About 1 out of 100 girls and women currently suffer from it. In the past, few young men and older adults got this disease. However, those numbers have been increasing. This is particularly true for male athletes or young men in the military, who feel driven to be thin and in shape. Males now make up 25% of all sufferers. Anorexia also used to be more common among European Americans, but that’s changing too. Occurrences are rapidly rising among other ethnic groups. What Are the Causes? (4) There is no specific cause of anorexia nervosa. Like other eating disorders, it is a mental illness that arises from a combination of circumstances. Biological, emotional, and psychological factors work together to bring about this disease. While anorexia involves a preoccupation with food, the underlying issues are about much more than that. People with eating disorders use food and exercise to cope with painful emotions or situations in other areas of their lives. [5) Many different factors can contribute to the disorder. Anorexia nervosa often runs in families and current research suggests there could be a genetic link. Feelings of low self—esteem and inadequacy are also two big contributors to this disease. A lack of control over one‘s life and a history of substance abuse can play a part as well. Other psychological factors include depression, anxiety and obsessive compulsive disorder. Many sufferers are perfectionists who feel the need to control every aspect of their lives. [6) Social causes, such as troubled ties with family members or friends, are often to blame as well. They also include pressures from society to look thin and attractive. Success and self-worth are often equated with a slender appearance. Other social causes include a history of being teased by peers because of body size. (7) There are several risk factors associated with anorexia. They include an early onset of puberty, participation in sports or other activities that place a premium on having a lean body, difficulty dealing with stress, regular dieting, and a history of physical or sexual abuse. Risk factors are not a guarantee that a person will become anorexic. Some young women who attend ballet classes and have problems with stress, for example, are more likely to get anorexia. However, others with the same risk factors cope just fine. Risk factors can play a part, but they don’t always lead to anorexia. [8} Researchers are still learning about all the underlying issues that can contribute to anorexia nervosa. For example, they‘re studying possible biochemical causes. Some researchers are studying the possible effects of serotonin, a brain chemical that regulates mood and appetite. Serotonin levels have been found to be out of balance in a percentage of individuals with anorexia or other eating disorders. What Are the Symptoms? [9} Most people with anorexia nervosa see themselves as overweight when they are actually underweight. They are obsessed with dropping pounds and do everything they can to lose weight. As a result, they often engage in purging behavior, which can include self-induced vomiting, along with a use of laxatives, diuretics, and/or enem as. [10} This can lead to a variety of short—term side effects and long—term com plications. Some of the short—term symptoms include brittle nails and hair, cold or swollen hands and feet, constipation, dry skin with a yellowish cast, lethargy, and a lack of menstruation. Other side effects can last for a longer period of time and be harder to overcome. Without treatment, anorexics could suffer from malnutrition, heart problems, bone disease and other dangerous com plications. Some of these effects continue to take a physical toll long after the disease has been treated and cured. Unfortunately, death is another com plication of anorexia and about 20% of the people with this disorder die prematurely. The side effects that most commonly prove fatal include fluid imbalances and cardiac arrest. Suicide is another com plication often linked to the disease. How Is It Diagnosed? [11) There are two types of anorexia nervosa physicians consider when making a diagnosis. Patients who suffer from the binging/purging type regularly engage in binging behavior, or eating a lot of food in a short period of time, that is soon followed by purging. Patients who suffer from the restricting type of anorexia do not engage in binging and purging, but instead continually deny their bodies the nutrients they need. To determine if a person has either type, doctors question patients about eating habits and behaviors. They also perform exams, take x—rays and other scans and do blood and urine tests. Most importantly, they consult a medical handbook, known as the Diagnostic and Statistical Manual of Mental Disorders, which has a list of criteria for each eating disorder. Even if a patient does not meet all the criteria, a doctor may be concerned enough to begin a course of treatment. [12) Another method that can determine if a person has anorexia nervosa is to measure the patient‘s BMI, or body mass index. This is the answer to a mathematical formula that factors in weight and height. For example, if you weigh 135 lbs. and stand 63 inches tall your BMI is 24. For an individual who is at a normal weight, BMI typically measures between 18.5 and 24.9. If it drops below that, a person is considered underweight and could have anorexia or other another eating disorder. How Is It Treated? [13) According to the National Eating Disorders Association, only one third of the people with anorexia receive the treatment they need. In general, the most important aspect of curing the disease is stopping starvation and returning the patient to a healthy appearance. Treating anorexia nervosa involves three major steps. The first involves restoring the patient to a healthy weight. To do this, anorexics often must be hospitalized, particularly if their weight has become dangerously low. Since malnutrition and a low body weight can impede a person‘s ability to think clearly, anorexics also need to gain weight to move on to the next phases of their treatment. [14) During the second step, doctors treat the psychological issues that led to the disorder. This can involve one or more forms of therapy. Cognitive therapy is a form of treatment that focuses on how a person thinks and feels. This part of the treatment process helps anorexics change how they see themselves and adjust distorted body images. The purpose of behavioral therapy is to alter the self—destructive behaviors of anorexia, including starvation and purging. During sessions, the patient may list alternatives to those behaviors or ways to avoid them. During interpersonal therapy, the doctor addresses the patient‘s relationships with others. He or she may discuss unhealthy or harmful relationships while suggesting coping strategies. [15) In the third step, patients learn healthy behaviors related to eating and exercise. This involves another type of treatment known as nutritional therapy. Patients learn about the importance of eating a balanced diet and exercising in a healthy way. The use of medications can also be a part of a patient’s treatment plan and help adjust symptoms related to mood and anxiety. One or more of the following may be prescribed: antidepressants, antipsychotics, mood stabilizers, hormones to restore menstrual cycle, and dietary supplements. However, some studies suggest medications won‘t prevent an anorexic from relapsing. [16) Unfortunately, there is no entirely effective treatment for anorexia and recovery could last years. Even after gaining weight, anorexics may remain thinner than average. Often, they display healthy behavior toward food for months at a time then suddenly relapse. Involving family members and friends can help with the adjustment and be a big advantage in the recovery process. However, long—term studies suggest that about half of all patients never fully recover. [17) Eating disorders don’t only impact the people who suffer from them. They also have a profound impact on friends and family members. For them, it can often feel as though the patient‘s relationship with his or her eating disorder takes precedence over all other relationships. Parents and siblings of an anorexic often spend a great deal of time and energy worrying about him or her, or cajoling the person to seek help or change the behavior. As a result, living with someone who has an eating disorder can be a painful process, even during the road to recovery. Therefore, treatment plans often include counseling sessions for family members and close friends. This can go a long way toward repairing damaged relationships. [18) For average anorexics, the disease lasts less than two years, which is a shorter time period than other eating disorders. It is unclear, however, what could attribute to this fact. Anecdotal evidence suggests anorexics may be reluctant to participate in research studies, which could skew the results. Can It Be Prevented? [19) The best way to prevent anorexia nervosa is to develop healthy attitudes toward food and exercise at a young age. Parents in particular can encourage and reinforce this type of behavior in a number of ways. Talk to your child about social pressures to be thin, set a good example with your own eating habits, and accept and support your child in all facets of life. Pediatricians can also help identify anorexia nervosa early. They can inquire about eating habits and check for weight fluctuations, for example. Identifying a disorder early can go a long way toward preventing com plications and speeding the recovery process. [20) However, there is no sure way to prevent this kind of disorder. Outside pressures from peers or cultural influences often have as much of an impact as experiences in the home. Therefore, it is important for parents to keep an eye on their kids, watch how they eat and observe their attitudes toward food and their bodies, to ensure they remain healthy and happy. [21) If you are concerned someone you know may have anorexia, there are steps you can take to help him or her. If you see the warning signs of an eating disorder in a friend or family member, don‘t think it‘s all in your head or try to brush the problem under a rug. It is very likely the person is in denial about the disease, and if you don't approach him or her the situation could become worse. Although it can be difficult to bring up such a delicate subject, talking about it can only help and is the first step toward a positive outcome. [22) Even if the person gets angry or defensive, don‘t give up. Try to approach him or her at a later time when you've both had a chance to calm down and regroup. It could take several attempts before he or she is ready to listen. Also, anorexics often deny their behavior and at times don‘t even realize they have a disease. Remember that pushing, lecturing or blaming won‘t help. Always make it clear you’re only concerned about the person and have his or her best interests at heart. The best thing you can do for a person with anorexia nervosa is to encourage him or her to seek professional help. Eating disorders are mental illnesses that won‘t go away on their own. They must be appropriately diagnosed and properly treated.

Unknown
Unusual
Fleeting
Superficial
Strong (Correct answer)

Correct answer: Strong

Paragraph 17 explicitly states that eating disorders "have a profound impact on friends and family members." The word 'profound' means very great or intense. The paragraph further elaborates on the significant worry, time, and energy parents and siblings spend, describing the process as 'painful.' These descriptions collectively indicate a strong and significant impact on family members.

Question 245: Two faces separated by exactly one face along a straight line of the net will be:

Adjacent faces
Touching at one edge
Opposite faces of the cube (Correct answer)
The same face

Correct answer: Opposite faces of the cube

Faces one step apart in a straight row fold into opposite positions.

Question 246: What is the value of (x+5)² if % of x equals % of 20?

225 (Correct answer)
25.25
2025
26.01
26

Correct answer: 225

Correct answer: 225 0.6𝑥=(0.3)×20→𝑥=10→(𝑥+5)²=(15)²=225

Question 247: A compound has a specific rotation of +32°. What would be the specific rotation of its enantiomer?

It cannot be determined from the information given.
+32°
0°
-32° (Correct answer)

Correct answer: -32°

Enantiomers are non-superimposable mirror images that rotate plane-polarized light to an equal magnitude but in opposite directions. If one enantiomer is dextrorotatory (+), its mirror image will be levorotatory (-) by the same amount.

Question 248: In nucleic acids, which of the following is not a pyrimidine base?

Cytosine
Thymine
Uracil
Adenine (Correct answer)
None of the above

Correct answer: Adenine

Nucleic acids (DNA and RNA) contain five main nitrogenous bases, which are classified into two groups: purines and pyrimidines. Purines have a double-ring structure and include Adenine and Guanine. Pyrimidines have a single-ring structure and include Cytosine, Thymine (in DNA), and Uracil (in RNA). Therefore, Adenine is not a pyrimidine base; it is a purine.

Question 249: Which type of electromagnetic radiation carries the highest energy per photon?

Radio waves
Infrared radiation
Visible light
Gamma rays (Correct answer)

Correct answer: Gamma rays

Gamma rays have the highest frequency and shortest wavelength in the electromagnetic spectrum, giving them the greatest energy per photon (E = hν).

Question 250: In glycolysis, glucose is converted into two molecules of which compound?

Pyruvate (Correct answer)
Acetyl-CoA
Lactate
Citrate

Correct answer: Pyruvate

Glycolysis splits one glucose into two pyruvate molecules.

Question 251: A promotional die is made from a cardboard cutout in a standard cross shape. The central square of the cross is a company logo. The square above it is marked 'WIN'. The square below the logo is marked 'LOSE'. The square to the left of the logo is 'SPIN AGAIN'. To the right of the logo is 'DRAW CARD'. The final square, attached below 'LOSE', is a 'WILD' card. Which of the following statements is true about the assembled die?

The 'WILD' face is adjacent to the 'WIN' face.
The 'SPIN AGAIN' and 'DRAW CARD' faces are on opposite sides. (Correct answer)
The 'WIN' and 'LOSE' faces are adjacent to each other.
The 'LOGO' face is opposite the 'LOSE' face.

Correct answer: The 'SPIN AGAIN' and 'DRAW CARD' faces are on opposite sides.

In a standard cross-shaped pattern, faces separated by one square in a straight line will be opposite. Therefore, 'WIN' is opposite 'LOSE', and 'LOGO' is opposite 'WILD'. The two arms of the cross, 'SPIN AGAIN' and 'DRAW CARD', will also be opposite each other when folded. Statement B correctly identifies an opposite pair. Statement A is false because 'WIN' and 'LOSE' are opposite. Statement C is false because 'LOGO' is opposite 'WILD'. Statement D is false because 'WILD' is opposite 'LOGO' and cannot be adjacent to 'WIN'.

Question 252: If a passage describes a process in sequential steps, a question about 'what happens immediately after step three' is best answered by:

Recalling general knowledge of the topic
Picking the final step in the process
Choosing the most complex-sounding option
Locating the sequence in the text and reading the next described step (Correct answer)

Correct answer: Locating the sequence in the text and reading the next described step

Sequence questions require returning to the passage's described order.

Question 253: A biotechnology company wants to develop a laundry detergent that effectively removes protein-based stains in cold water washes. Based on the passage, which of the following would be the most promising component to include?

A lipase isolated from a mesophilic bacterium.
Cold-shock proteins (CSPs) from a deep-sea microbe.
Antifreeze proteins (AFPs) from an alpine insect.
A protease isolated from a psychrophilic organism. (Correct answer)

Correct answer: A protease isolated from a psychrophilic organism.

The final paragraph states that 'enzymes like proteases...from these organisms are used in...cold-water laundry detergents.' A protease is an enzyme that breaks down proteins, making it ideal for protein-based stains. The enzyme must come from a psychrophilic (cold-adapted) organism to be effective in cold water.

Question 254: Which coenzyme is reduced during the glyceraldehyde-3-phosphate dehydrogenase step?

ATP to ADP
NADP+ to NADPH
NAD+ to NADH (Correct answer)
FAD to FADH2

Correct answer: NAD+ to NADH

This oxidation step transfers electrons to NAD+, forming NADH.

Question 255: On a cross-shaped cube net, the center square and the square directly across the cross arms become:

Adjacent faces
Two halves of one face
The same face
Opposite faces (Correct answer)

Correct answer: Opposite faces

Squares two steps apart along a straight line on the net fold into opposite faces.

Question 256: A passage states a hypothesis was 'not supported by the data.' What does this most directly imply?

The hypothesis is permanently disproven
The experiment was fraudulent
The collected evidence failed to confirm the proposed explanation (Correct answer)
The researchers made a calculation error

Correct answer: The collected evidence failed to confirm the proposed explanation

Lack of support means the evidence did not confirm the hypothesis, not that fraud or error occurred.

Question 257: In the complete combustion of butane (C4H10), what is the sum of the stoichiometric coefficients of the reactants and products in the balanced chemical equation?

15
18
21
33 (Correct answer)

Correct answer: 33

The balanced chemical equation for the complete combustion of butane is 2 C4H10 + 13 O2 → 8 CO2 + 10 H2O. To find the sum of the coefficients, you add them together: 2 + 13 + 8 + 10 = 33. It's crucial to balance the equation first, starting with carbons, then hydrogens, and finally oxygens.

Question 258: Select the appropriate FRONT VIEW.

C)
A)
D)
B) (Correct answer)

Correct answer: B)

To determine the correct front view, imagine standing directly in front of the three-dimensional object. The front view should show the exact shape and all visible edges and surfaces from that specific angle, without any perspective distortion. Option B accurately represents what would be seen from the front of the given object.

Question 259: The melting point of which of the following is the highest?

2,2-Dimethylpropane (Correct answer)
Ethane
Butane
Propane
Pentane

Correct answer: 2,2-Dimethylpropane

The melting point of alkanes is influenced by molecular size and the efficiency of molecular packing in the solid state. While larger molecules generally have higher melting points due to increased van der Waals forces, molecular symmetry also plays a crucial role. 2,2-Dimethylpropane is a highly symmetrical, spherical molecule that can pack very efficiently into a crystal lattice, leading to stronger intermolecular forces and a significantly higher melting point compared to its linear isomer, pentane, or smaller alkanes like ethane, propane, and butane.

Question 260: When two angles look nearly identical, which feature should you compare first?

The color of the lines
The length of each ray
The spread between the two rays at the vertex (Correct answer)
The label letter assigned to it

Correct answer: The spread between the two rays at the vertex

Angle size depends only on the spread at the vertex, not on ray length.

Question 261: A question referencing 'the passage as a whole' is asking about:

The overall purpose or theme (Correct answer)
A specific number in the text
One isolated sentence
The author's name

Correct answer: The overall purpose or theme

Such questions concern the passage's overall purpose or central theme.

Question 262: Caffeine can attach to the adenosine receptor but cannot activate it since its structure is very similar to that of adenosine. When caffeine binds to the adenosine receptor, which of the following best characterizes the effect?

Caffeine restores the effect of adenosine by substituting for it as a signaling molecule
Caffeine enhances the effect of adenosine, overstimulating the adenosine signal transduction pathway and ultimately causing it to fail
Caffeine blocks the effect of adenosine by preventing the binding of adenosine to the adenosine receptor (Correct answer)
Caffeine has no effect on the activity of adenosine

Correct answer: Caffeine blocks the effect of adenosine by preventing the binding of adenosine to the adenosine receptor

Caffeine acts as an antagonist to adenosine receptors because it binds to the receptor but does not activate it, preventing adenosine from binding and exerting its normal effects. Adenosine typically promotes relaxation and drowsiness, so by blocking its binding, caffeine prevents these effects, leading to increased alertness. This is a classic example of competitive inhibition at a receptor site.

Question 263: Consider the image below, which was created by cementing together cubes of the same size. Each group was painted on all sides except the bottom on which it rests after it was cemented. Although not all cubes in the illustration are visible, the only ones that are hidden are those that are required to support other cubes. How many of the cubes in the image have only one side painted?

1 cube
5 cubes
2 cubes (Correct answer)
3 cubes
4 cubes

Correct answer: 2 cubes

Carefully examine the image of the cube structure. Cubes with only one side painted are those that are on an exposed face of the overall structure but are not on an edge or corner. By counting these specific cubes in the given image, two cubes fit this description, as they are surrounded by other cubes on all but one exposed face.

Question 264: Curcumin use for a lengthy period of time may cause liver cell damage. Curcumin should be used with caution in the treatment of Alzheimer's disease in patients who consume excessive amounts of alcohol.

The first statement is false, but the second one is true.
Both statements are true and they refute each other.
The first statement is true, but the second one is false.
Both statements are false.
Both statements are true. (Correct answer)

Correct answer: Both statements are true.

This question refers to a passage about Curcumin that was not provided. Without the relevant text, it is impossible to determine how scientists believe curcumin prevents inflammatory damage according to that specific passage. Assuming the provided correct answer, 'By preventing metal induction of NF-Kappa' would be the mechanism explained in the missing text.

Question 265: A flat pattern is shown in this question. The goal is to fold this pattern into a three-dimensional figure. One of the four answer options is the correct figure. In each set, there is only one accurate figure. The flat pattern is seen on the outside of the folded shape. Choose the three-dimensional shape created when the flat pattern is folded.

B)
D)
C)
A) (Correct answer)

Correct answer: A)

Mentally fold the flat pattern into a three-dimensional figure. Observe how the different sections of the net connect and form the sides of the 3D shape. Option A accurately represents the resulting three-dimensional figure when the provided flat pattern is folded, ensuring all faces and their orientations are correct.

Question 266: A Period 3 element with a valence configuration of 3s²3p² is:

Phosphorus
Silicon (Correct answer)
Aluminum
Sulfur

Correct answer: Silicon

Silicon (Si, Z = 14) has the electron configuration [Ne]3s²3p², placing it in Period 3 and Group 14 of the periodic table.

Question 267: In the reaction 2H2 + O2 → 2H2O, how many grams of water form from 4 g of H2 (excess O2, H=1, O=16)?

9 g
18 g
72 g
36 g (Correct answer)

Correct answer: 36 g

4 g H2 is 2 mol, producing 2 mol water at 18 g/mol = 36 g.

Question 268: What is the empirical formula of an unknown compound with a carbon content of 48.02 percent, a hydrogen content of 18.74 percent, and a nitrogen content of 33.24 percent? (Nitrogen has an atomic weight of 14.0 g.)

C₂₅H₁N₃₁
C₂H₁N₃
C₃H₁N₂
C₅H₂₄N₃ (Correct answer)
C₃₁H₁N₂₅

Correct answer: C₅H₂₄N₃

To find the empirical formula, first assume a 100 g sample, so you have 48.02 g C, 18.74 g H, and 33.24 g N. Convert these masses to moles using their atomic weights (C=12.01, H=1.01, N=14.01): C: 48.02/12.01 ≈ 4.00 mol; H: 18.74/1.01 ≈ 18.55 mol; N: 33.24/14.01 ≈ 2.37 mol. Next, divide each mole value by the smallest number of moles (2.37 mol): C: 4.00/2.37 ≈ 1.69; H: 18.55/2.37 ≈ 7.83; N: 2.37/2.37 = 1. To get whole numbers, multiply by a factor (e.g., 3 for C and H to be close to integers): C ≈ 5, H ≈ 23.5, N = 3. Rounding H to 24, the empirical formula is C₅H₂₄N₃.

Question 269: Which enzyme catalyzes the committed, rate-limiting step of glycolysis?

Phosphofructokinase-1 (Correct answer)
Pyruvate kinase
Hexokinase
Aldolase

Correct answer: Phosphofructokinase-1

PFK-1 catalyzes the irreversible, allosterically regulated committed step of glycolysis.

Question 270: Which of the following correctly pairs a metabolic process with its primary cellular location in eukaryotes?

Electron Transport Chain - Cytoplasm
Krebs Cycle - Mitochondrial Matrix (Correct answer)
Glycolysis - Mitochondrial Inner Membrane
Fermentation - Mitochondrial Matrix

Correct answer: Krebs Cycle - Mitochondrial Matrix

The Krebs Cycle (also known as the citric acid cycle) occurs in the mitochondrial matrix. Glycolysis takes place in the cytoplasm, the electron transport chain is located on the inner mitochondrial membrane, and fermentation also occurs in the cytoplasm.

Question 271: A 72-foot-long rectangular garden belongs to a farmer. What is the area of the garden if one side is 4 feet longer than the other?

1280 ft2
320 ft2 (Correct answer)
672 ft2
324 ft2
1476 ft2

Correct answer: 320 ft2

The perimeter of a rectangle is calculated as 2(length + width). Given the perimeter is 72 feet and one side is 4 feet longer than the other, we can set up an equation: 72 = 2(x + x + 4), which simplifies to 36 = 2x + 4, so x = 16 feet. This means the sides are 16 feet and 20 feet. The area of the garden is then found by multiplying the length and width: 16 feet * 20 feet = 320 ft².

Question 272: Consider the four angles labeled 1 through 4. One angle is a perfect right angle (90 degrees). Rank all four angles from smallest to largest.

2, 4, 1, 3
1, 3, 4, 2
3, 4, 1, 2
3, 1, 4, 2 (Correct answer)

Correct answer: 3, 1, 4, 2

The correct ranking is 3, 1, 4, 2. Angles 3 and 1 are acute (less than 90 degrees), with angle 3 being the smaller of the two. Angle 4 is the right angle (exactly 90 degrees). Angle 2 is obtuse (greater than 90 degrees), making it the largest.

Question 273: A face marked with stripes running left-to-right, when folded onto a vertical side, will show stripes that:

Maintain their orientation relative to the shared edge (Correct answer)
Always become vertical
Reverse into a mirror image
Disappear

Correct answer: Maintain their orientation relative to the shared edge

Folding rotates the face but the stripes stay fixed relative to the connecting edge.

Question 274: In a laboratory experiment, the reaction of 32.5 g of zinc with excess hydrochloric acid produced 0.90 g of hydrogen gas. What is the percent yield of hydrogen? The balanced equation is: Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g). (Molar masses: Zn = 65.4 g/mol, H2 = 2.0 g/mol)

99.4%
89.5%
90.0% (Correct answer)
45.0%

Correct answer: 90.0%

First, calculate the theoretical yield of H2. Convert the mass of Zn to moles: 32.5 g Zn / 65.4 g/mol ≈ 0.497 mol Zn. According to the 1:1 mole ratio between Zn and H2, 0.497 moles of H2 should be produced. Convert moles of H2 to grams: 0.497 mol H2 * 2.0 g/mol = 0.994 g H2 (theoretical yield). The actual yield is given as 0.90 g. The percent yield is (Actual Yield / Theoretical Yield) * 100 = (0.90 g / 0.994 g) * 100 ≈ 90.5%, which is closest to 90.0%.

Question 275: A single hole punched through two folded layers will produce how many holes when unfolded?

3
2 (Correct answer)
1
4

Correct answer: 2

Each layer the punch passes through becomes one hole, so two layers give two holes.

Question 276: According to the passage, how do psychrophiles maintain cell membrane fluidity at low temperatures?

By increasing the production of antifreeze proteins to prevent membrane freezing.
By reducing the number of transport proteins embedded in the membrane.
By synthesizing a thicker, more insulating cell wall.
By incorporating a higher percentage of unsaturated and short-chain fatty acids. (Correct answer)

Correct answer: By incorporating a higher percentage of unsaturated and short-chain fatty acids.

The first paragraph explicitly states that a primary challenge is reduced membrane fluidity and that 'Psychrophilic bacteria counteract this by incorporating a higher proportion of unsaturated and short-chain fatty acids into their membrane phospholipids.' This directly answers the question.

Question 277: Among answer choices, an impossible distractor often features a pattern on a face that:

Appears on the correct face
Matches the net exactly
Is simply rotated correctly
Cannot be adjacent to its neighbors per the net (Correct answer)

Correct answer: Cannot be adjacent to its neighbors per the net

Wrong answers place a mark on a face whose adjacency contradicts the net.

Question 278: In assigning R/S, which atom gets highest priority?

Lowest mass
Highest atomic number (Correct answer)
Highest electronegativity
Smallest atomic radius

Correct answer: Highest atomic number

CIP rules rank substituents by atomic number, highest first.

Question 279: Assume that research in the future revealed a clear link between family history and anorexia nervosa. What is the most likely response from the author? [1) Eating disorders impact 24 million people in the United States and 70 million worldwide. These disorders go beyond normal dieting and involve extreme behavior related to food or exercise, such as starvation and binge eating. In the past few decades, eating disorders have become a major health crisis and can lead to serious com plications or even fatalities if left untreated. [2) Anorexia nervosa is one of the most well—known eating disorders and is also one of the deadliest. People with this disease, known as anorexics, have an intense fear of gaining weight. They develop a distorted body image which prevents them from correctly evaluating their body size and shape. Anorexics believe they are overweight even when they are normal weight or even grossly underweight. When they look in the mirror, the image they see is not a true reflection of their appearance. As a result, they go to extreme lengths to lose pounds and typically starve themselves, until they become thinner and thinner. Many drop so much weight they develop a malnourished, emaciated appearance. Anorexics are often perfectionists who feel the disorder helps them gain control over their lives, when in fact, just the opposite occurs. [3) Most people who develop anorexia nervosa are young and female. About 1 out of 100 girls and women currently suffer from it. In the past, few young men and older adults got this disease. However, those numbers have been increasing. This is particularly true for male athletes or young men in the military, who feel driven to be thin and in shape. Males now make up 25% of all sufferers. Anorexia also used to be more common among European Americans, but that’s changing too. Occurrences are rapidly rising among other ethnic groups. What Are the Causes? (4) There is no specific cause of anorexia nervosa. Like other eating disorders, it is a mental illness that arises from a combination of circumstances. Biological, emotional, and psychological factors work together to bring about this disease. While anorexia involves a preoccupation with food, the underlying issues are about much more than that. People with eating disorders use food and exercise to cope with painful emotions or situations in other areas of their lives. [5) Many different factors can contribute to the disorder. Anorexia nervosa often runs in families and current research suggests there could be a genetic link. Feelings of low self—esteem and inadequacy are also two big contributors to this disease. A lack of control over one‘s life and a history of substance abuse can play a part as well. Other psychological factors include depression, anxiety and obsessive compulsive disorder. Many sufferers are perfectionists who feel the need to control every aspect of their lives. [6) Social causes, such as troubled ties with family members or friends, are often to blame as well. They also include pressures from society to look thin and attractive. Success and self-worth are often equated with a slender appearance. Other social causes include a history of being teased by peers because of body size. (7) There are several risk factors associated with anorexia. They include an early onset of puberty, participation in sports or other activities that place a premium on having a lean body, difficulty dealing with stress, regular dieting, and a history of physical or sexual abuse. Risk factors are not a guarantee that a person will become anorexic. Some young women who attend ballet classes and have problems with stress, for example, are more likely to get anorexia. However, others with the same risk factors cope just fine. Risk factors can play a part, but they don’t always lead to anorexia. [8} Researchers are still learning about all the underlying issues that can contribute to anorexia nervosa. For example, they‘re studying possible biochemical causes. Some researchers are studying the possible effects of serotonin, a brain chemical that regulates mood and appetite. Serotonin levels have been found to be out of balance in a percentage of individuals with anorexia or other eating disorders. What Are the Symptoms? [9} Most people with anorexia nervosa see themselves as overweight when they are actually underweight. They are obsessed with dropping pounds and do everything they can to lose weight. As a result, they often engage in purging behavior, which can include self-induced vomiting, along with a use of laxatives, diuretics, and/or enem as. [10} This can lead to a variety of short—term side effects and long—term com plications. Some of the short—term symptoms include brittle nails and hair, cold or swollen hands and feet, constipation, dry skin with a yellowish cast, lethargy, and a lack of menstruation. Other side effects can last for a longer period of time and be harder to overcome. Without treatment, anorexics could suffer from malnutrition, heart problems, bone disease and other dangerous com plications. Some of these effects continue to take a physical toll long after the disease has been treated and cured. Unfortunately, death is another com plication of anorexia and about 20% of the people with this disorder die prematurely. The side effects that most commonly prove fatal include fluid imbalances and cardiac arrest. Suicide is another com plication often linked to the disease. How Is It Diagnosed? [11) There are two types of anorexia nervosa physicians consider when making a diagnosis. Patients who suffer from the binging/purging type regularly engage in binging behavior, or eating a lot of food in a short period of time, that is soon followed by purging. Patients who suffer from the restricting type of anorexia do not engage in binging and purging, but instead continually deny their bodies the nutrients they need. To determine if a person has either type, doctors question patients about eating habits and behaviors. They also perform exams, take x—rays and other scans and do blood and urine tests. Most importantly, they consult a medical handbook, known as the Diagnostic and Statistical Manual of Mental Disorders, which has a list of criteria for each eating disorder. Even if a patient does not meet all the criteria, a doctor may be concerned enough to begin a course of treatment. [12) Another method that can determine if a person has anorexia nervosa is to measure the patient‘s BMI, or body mass index. This is the answer to a mathematical formula that factors in weight and height. For example, if you weigh 135 lbs. and stand 63 inches tall your BMI is 24. For an individual who is at a normal weight, BMI typically measures between 18.5 and 24.9. If it drops below that, a person is considered underweight and could have anorexia or other another eating disorder. How Is It Treated? [13) According to the National Eating Disorders Association, only one third of the people with anorexia receive the treatment they need. In general, the most important aspect of curing the disease is stopping starvation and returning the patient to a healthy appearance. Treating anorexia nervosa involves three major steps. The first involves restoring the patient to a healthy weight. To do this, anorexics often must be hospitalized, particularly if their weight has become dangerously low. Since malnutrition and a low body weight can impede a person‘s ability to think clearly, anorexics also need to gain weight to move on to the next phases of their treatment. [14) During the second step, doctors treat the psychological issues that led to the disorder. This can involve one or more forms of therapy. Cognitive therapy is a form of treatment that focuses on how a person thinks and feels. This part of the treatment process helps anorexics change how they see themselves and adjust distorted body images. The purpose of behavioral therapy is to alter the self—destructive behaviors of anorexia, including starvation and purging. During sessions, the patient may list alternatives to those behaviors or ways to avoid them. During interpersonal therapy, the doctor addresses the patient‘s relationships with others. He or she may discuss unhealthy or harmful relationships while suggesting coping strategies. [15) In the third step, patients learn healthy behaviors related to eating and exercise. This involves another type of treatment known as nutritional therapy. Patients learn about the importance of eating a balanced diet and exercising in a healthy way. The use of medications can also be a part of a patient’s treatment plan and help adjust symptoms related to mood and anxiety. One or more of the following may be prescribed: antidepressants, antipsychotics, mood stabilizers, hormones to restore menstrual cycle, and dietary supplements. However, some studies suggest medications won‘t prevent an anorexic from relapsing. [16) Unfortunately, there is no entirely effective treatment for anorexia and recovery could last years. Even after gaining weight, anorexics may remain thinner than average. Often, they display healthy behavior toward food for months at a time then suddenly relapse. Involving family members and friends can help with the adjustment and be a big advantage in the recovery process. However, long—term studies suggest that about half of all patients never fully recover. [17) Eating disorders don’t only impact the people who suffer from them. They also have a profound impact on friends and family members. For them, it can often feel as though the patient‘s relationship with his or her eating disorder takes precedence over all other relationships. Parents and siblings of an anorexic often spend a great deal of time and energy worrying about him or her, or cajoling the person to seek help or change the behavior. As a result, living with someone who has an eating disorder can be a painful process, even during the road to recovery. Therefore, treatment plans often include counseling sessions for family members and close friends. This can go a long way toward repairing damaged relationships. [18) For average anorexics, the disease lasts less than two years, which is a shorter time period than other eating disorders. It is unclear, however, what could attribute to this fact. Anecdotal evidence suggests anorexics may be reluctant to participate in research studies, which could skew the results. Can It Be Prevented? [19) The best way to prevent anorexia nervosa is to develop healthy attitudes toward food and exercise at a young age. Parents in particular can encourage and reinforce this type of behavior in a number of ways. Talk to your child about social pressures to be thin, set a good example with your own eating habits, and accept and support your child in all facets of life. Pediatricians can also help identify anorexia nervosa early. They can inquire about eating habits and check for weight fluctuations, for example. Identifying a disorder early can go a long way toward preventing com plications and speeding the recovery process. [20) However, there is no sure way to prevent this kind of disorder. Outside pressures from peers or cultural influences often have as much of an impact as experiences in the home. Therefore, it is important for parents to keep an eye on their kids, watch how they eat and observe their attitudes toward food and their bodies, to ensure they remain healthy and happy. [21) If you are concerned someone you know may have anorexia, there are steps you can take to help him or her. If you see the warning signs of an eating disorder in a friend or family member, don‘t think it‘s all in your head or try to brush the problem under a rug. It is very likely the person is in denial about the disease, and if you don't approach him or her the situation could become worse. Although it can be difficult to bring up such a delicate subject, talking about it can only help and is the first step toward a positive outcome. [22) Even if the person gets angry or defensive, don‘t give up. Try to approach him or her at a later time when you've both had a chance to calm down and regroup. It could take several attempts before he or she is ready to listen. Also, anorexics often deny their behavior and at times don‘t even realize they have a disease. Remember that pushing, lecturing or blaming won‘t help. Always make it clear you’re only concerned about the person and have his or her best interests at heart. The best thing you can do for a person with anorexia nervosa is to encourage him or her to seek professional help. Eating disorders are mental illnesses that won‘t go away on their own. They must be appropriately diagnosed and properly treated.

The author would doubt the veracity of the research.
The author's view on possible causes of the disease would not change.
The author would discount the im pact of psychological and emotional factors.
The author would believe genetics plays a prominent role among other causes. (Correct answer)
The author would push for additional studies.

Correct answer: The author would believe genetics plays a prominent role among other causes.

The passage already states in paragraph 5 that "Anorexia nervosa often runs in families and current research suggests there could be a genetic link." This indicates the author is open to and already considers a genetic component. Therefore, further research confirming a clear link would simply strengthen the author's existing belief that genetics plays a prominent role among the various causes of the disease.

Question 280: A cube net has six squares. How many pairs of opposite faces does the finished cube have?

Three (Correct answer)
Two
Six
Four

Correct answer: Three

A cube has six faces grouped into three opposite pairs.

Dental Admission Test (DAT)

The DAT is a standardized examination designed to assess general academic ability and comprehension of scientific information, serving as a key component for admission to dental schools in the U.S. and Canada.

280

Questions

315 min

Time Limit

70%

To Pass

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