TEAS Practice Test: Video 7 Answers (25 Questions) — Questions and Answers

Question 1: Which type of chemical bond involves the sharing of electrons between atoms?

Ionic bond
Covalent bond (Correct answer)
Metallic bond
Hydrogen bond

Correct answer: Covalent bond

Covalent bonds form when atoms share pairs of electrons, commonly between nonmetal atoms.

Question 2: Which subatomic particle determines the identity of an element?

Electron
Neutron
Positron
Proton (Correct answer)

Correct answer: Proton

The number of protons (atomic number) defines which element an atom is.

Question 3: Which of these is a chemical change rather than a physical change?

Melting ice
Boiling water
Rusting iron (Correct answer)
Crushing a can

Correct answer: Rusting iron

Rusting forms a new substance (iron oxide), making it a chemical change.

Question 4: What is the term for the amount of a substance measured in moles per liter of solution?

Normality
Osmolarity
Molarity (Correct answer)
Molality

Correct answer: Molarity

Molarity (M) is defined as the number of moles of solute per liter of solution, expressed as mol/L or M.

Question 5: A patient's blood sample is found to have a pH of 7.28. This condition is called:

Hypoxia
Neutralization
Acidosis (Correct answer)
Alkalosis

Correct answer: Acidosis

Normal blood pH is 7.35–7.45. A pH of 7.28 is below normal, indicating acidosis — too much acid (H⁺) or too little bicarbonate in the blood.

Question 6: Which structure connects a muscle to a bone?

Fascia
Ligament
Tendon (Correct answer)
Cartilage

Correct answer: Tendon

Tendons are fibrous connective tissue structures that attach muscle to bone, transmitting the force of muscle contraction to move bones.

Question 7: The skin's outermost layer, which acts as a barrier against pathogens and water loss, is the:

Epidermis (Correct answer)
Dermis
Hypodermis
Subcutaneous layer

Correct answer: Epidermis

The epidermis is the outermost layer of skin, composed mainly of keratinocytes, providing a waterproof barrier.

Question 8: Which digestive organ is responsible for the majority of nutrient absorption?

Stomach
Large intestine
Small intestine (Correct answer)
Esophagus

Correct answer: Small intestine

The small intestine absorbs approximately 90% of all nutrients (proteins, fats, carbohydrates, vitamins, minerals) into the bloodstream.

Question 9: The corpus callosum is a structure that:

Controls the sleep-wake cycle
Processes visual information
Connects the two cerebral hemispheres (Correct answer)
Regulates hunger and thirst

Correct answer: Connects the two cerebral hemispheres

The corpus callosum is a large band of white matter connecting the left and right cerebral hemispheres, allowing communication between them.

Question 10: Which blood type is considered the 'universal donor'?

Type AB positive
Type O negative (Correct answer)
Type A positive
Type B negative

Correct answer: Type O negative

Type O negative blood lacks A, B, and Rh antigens on red blood cells, making it safe to transfuse to most patients in emergencies.

Question 11: A mutation that changes a single nucleotide base and results in a different amino acid being inserted is called a:

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

Correct answer: Missense mutation

A missense mutation is a single nucleotide substitution that changes one amino acid in the resulting protein to a different amino acid.

Question 12: Which of the following correctly describes the process of transpiration in plants?

Loss of water vapor through stomata in leaves (Correct answer)
Absorption of water through leaves
Conversion of light energy to chemical energy
Transport of sugars from leaves to roots

Correct answer: Loss of water vapor through stomata in leaves

Transpiration is the evaporation of water vapor through stomata (pores) in leaves, creating a water potential gradient that drives water uptake from roots.

Question 13: Which level of protein structure describes the coiling or folding of a polypeptide chain into alpha helices and beta pleated sheets?

Quaternary structure
Secondary structure (Correct answer)
Primary structure
Tertiary structure

Correct answer: Secondary structure

Secondary structure refers to local folding of the polypeptide backbone into alpha helices and beta-pleated sheets, stabilized by hydrogen bonds between backbone atoms.

Question 14: During which phase of mitosis do sister chromatids separate and move to opposite poles?

Telophase
Anaphase (Correct answer)
Metaphase
Prophase

Correct answer: Anaphase

Sister chromatids are pulled apart toward opposite poles during anaphase.

Question 15: Which blood vessels carry oxygen-rich blood away from the heart to the body?

Venules
Capillaries
Arteries (Correct answer)
Veins

Correct answer: Arteries

Arteries carry oxygenated blood away from the heart (except the pulmonary artery).

Question 16: Which sentence is punctuated correctly with a series of three or more items?

The patient needed oxygen, fluids and rest.
The patient needed, oxygen fluids, and rest.
The patient needed oxygen fluids, and rest.
The patient needed oxygen, fluids, and rest. (Correct answer)

Correct answer: The patient needed oxygen, fluids, and rest.

In a series of three or more items, a comma should appear after each item including before the conjunction. The Oxford (serial) comma before 'and' clarifies meaning.

Question 17: Which sentence is written in the passive voice?

The medication was dispensed by the pharmacist. (Correct answer)
The pharmacist dispensed the medication.
The pharmacist carefully counted the pills.
The patient received the prescription.

Correct answer: The medication was dispensed by the pharmacist.

In passive voice, the subject receives the action. 'The medication was dispensed by the pharmacist' — 'medication' (subject) receives the action of being dispensed.

Question 18: Choose the sentence that is a fragment.

Running through the rain. (Correct answer)
She ran through the rain.
The rain fell hard.
We ran home.

Correct answer: Running through the rain.

'Running through the rain' lacks a subject and a complete verb, making it a fragment.

Question 19: Which sentence uses correct subject-verb agreement?

The nurses team are ready for their shift.
The team nurse are ready for their shift.
The team of nurses is ready for their shift. (Correct answer)
The team of nurses are ready for their shift.

Correct answer: The team of nurses is ready for their shift.

The subject is 'team' (singular collective noun), so the singular verb 'is' is correct. The prepositional phrase 'of nurses' does not affect subject-verb agreement.

Question 20: Which of the following is a correctly written possessive noun?

The nurse station's was busy.
The nurses' station was one nurse's station.
The nurse's station was busy. (Correct answer)
The nurses station was busy.

Correct answer: The nurse's station was busy.

'Nurse's' shows singular possession — the station belonging to one nurse — using 's.

Question 21: A store sells juice in 32 fl oz bottles for $2.56 and in 20 fl oz bottles for $1.80. Which is the better unit price?

Both have the same unit price
32 fl oz bottle at $0.09/oz
20 fl oz bottle at $0.08/oz
32 fl oz bottle at $0.08/oz (Correct answer)

Correct answer: 32 fl oz bottle at $0.08/oz

$2.56 ÷ 32 = $0.08/oz, versus $1.80 ÷ 20 = $0.09/oz, so the 32 oz bottle is cheaper per ounce.

Question 22: Round 4.7852 to the nearest hundredth.

4.8
4.78
4.79 (Correct answer)
4.785

Correct answer: 4.79

The digit in the thousandths place is 5, so round the hundredths digit up: 4.79.

Question 23: Subtract 3 2/5 from 5 1/4.

1 17/20 (Correct answer)
1 3/20
2 3/20
2 17/20

Correct answer: 1 17/20

5 1/4 − 3 2/5 = 21/4 − 17/5 = 105/20 − 68/20 = 37/20 = 1 17/20.

Question 24: Which fraction is largest: 3/5, 7/12, 5/8, or 2/3?

2/3 (Correct answer)
5/8
7/12
3/5

Correct answer: 2/3

Converting to decimals: 3/5=0.60, 7/12≈0.583, 5/8=0.625, 2/3≈0.667 — 2/3 is largest.

Question 25: What is the least common multiple (LCM) of 6 and 8?

48
12
24 (Correct answer)
16

Correct answer: 24

Multiples of 6: 6, 12, 18, 24; multiples of 8: 8, 16, 24 — the smallest shared value is 24.

TEAS Practice Test: Video 7 Answers (25 Questions)

Which type of chemical bond involves the sharing of electrons between atoms?

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