Pennsylvania Keystone Test — Questions and Answers

Question 1: Which component of the Keystone Literature exam requires students to write an extended response?

The text-dependent analysis (TDA) prompt (Correct answer)
The vocabulary matching section
Multiple-choice section only
The Evidence-Based Selected Response (EBSR) section

Correct answer: The text-dependent analysis (TDA) prompt

The text-dependent analysis (TDA) prompt requires students to write an extended written response using evidence from the provided texts.

Question 2: What is the role of NADH and FADH2 in cellular respiration?

They absorb light energy for the cell
They directly produce ATP in glycolysis
They carry electrons to the electron transport chain (Correct answer)
They break down glucose into pyruvate

Correct answer: They carry electrons to the electron transport chain

NADH and FADH2 are electron carriers that deliver high-energy electrons to the electron transport chain, where their energy drives ATP synthesis.

Question 3: Which of the following best defines the theme of a fictional text?

The time and place where the story occurs.
The underlying message or main idea about life or human nature. (Correct answer)
The sequence of events that make up the story.
A one-word topic like 'love' or 'war'.

Correct answer: The underlying message or main idea about life or human nature.

A theme is the central, underlying, and controlling idea or insight of a work of literature. It is the message the author seeks to convey about a topic and is typically a universal statement about life, society, or human nature, not just a single word or the plot itself.

Question 4: What does the term 'end-of-course exam' mean in the context of Keystone testing?

A final exam created by the classroom teacher
An assessment given after students complete a specific course of study (Correct answer)
An optional exit exam for seniors only
An exam given at the end of each school day

Correct answer: An assessment given after students complete a specific course of study

End-of-course exams like Keystones are administered after students finish the corresponding course to assess their learning.

Question 5: What is the difference between genotype and phenotype?

They are synonymous terms
Genotype refers to proteins; phenotype refers to DNA
Genotype is expressed traits; phenotype is the allele combination
Genotype is the allele combination; phenotype is the expressed trait (Correct answer)

Correct answer: Genotype is the allele combination; phenotype is the expressed trait

Genotype is an organism's genetic makeup (alleles), while phenotype is the observable, expressed characteristic.

Question 6: A story set during the Great Depression in rural Oklahoma uses that setting primarily to:

Create a surprising twist ending
Explain the narrator's point of view
Introduce the antagonist's background
Establish the economic and social hardships characters face (Correct answer)

Correct answer: Establish the economic and social hardships characters face

Historical and geographical settings shape the characters' circumstances and motivations within the narrative.

Question 7: A school's Keystone Exam results show most students score Below Basic in Algebra I. What is the most appropriate next step for the district?

Analyze instructional practices and provide targeted math interventions (Correct answer)
Replace the Algebra I Keystone with a teacher-made test
Lower the passing score threshold for that school
Eliminate the Algebra I course from the curriculum

Correct answer: Analyze instructional practices and provide targeted math interventions

Low scores signal a need to examine and improve instructional approaches and provide students with additional support.

Question 8: A function is defined as f(x) = 3x² - 2x + 1. What is f(-2)?

17 (Correct answer)
9
5
13

Correct answer: 17

f(-2) = 3(-2)² - 2(-2) + 1 = 3(4) + 4 + 1 = 12 + 4 + 1 = 17.

Question 9: If a trait shows incomplete dominance, what will the F1 phenotype of a cross between two homozygous parents look like?

Identical to one parent
Identical to both parents
Intermediate between both parents (Correct answer)
Absent in F1

Correct answer: Intermediate between both parents

In incomplete dominance, heterozygotes display a phenotype intermediate between the two homozygous parental phenotypes.

Question 10: Which of the following is the BEST way to distinguish between an author's stated purpose and the actual effect of a text?

Focus exclusively on the concluding paragraph
Compare what the author claims to do with how the text actually makes readers think or feel (Correct answer)
Assume the author always achieves exactly what is intended
Look only at the title and ignore the body

Correct answer: Compare what the author claims to do with how the text actually makes readers think or feel

Evaluating stated purpose against actual effect requires analyzing both the author's explicit goals and the text's emotional and intellectual impact on the reader.

Question 11: The table shows costs: 1 item=$4, 2 items=$7, 3 items=$10, 4 items=$13. What is the cost for 10 items?

$31 (Correct answer)
$28
$34
$37

Correct answer: $31

The pattern is f(n) = 3n + 1; f(10) = 3(10) + 1 = 31.

Question 12: A reader notices that every time the protagonist feels hopeful, the sun is described as shining, and when she is discouraged, the weather turns stormy. This pattern is an example of:

Exposition
Anaphora
Pathetic fallacy (Correct answer)
Dramatic irony

Correct answer: Pathetic fallacy

Pathetic fallacy is the literary technique of attributing human emotions to nature or the environment, such as weather reflecting a character's mood.

Question 13: A nonfiction author writes about deforestation and includes a graph showing forest loss over 50 years. The graph primarily serves to:

Introduce an opposing viewpoint
Entertain readers who dislike dense text
Visually support and quantify the author's claims (Correct answer)
Replace the need for a written argument

Correct answer: Visually support and quantify the author's claims

Graphs provide visual, quantitative evidence that reinforces the author's written claims and helps readers grasp trends quickly.

Question 14: Which type of symbiosis benefits both organisms involved?

Predation
Commensalism
Mutualism (Correct answer)
Parasitism

Correct answer: Mutualism

In mutualism, both organisms benefit from the relationship, such as bees pollinating flowers while collecting nectar.

Question 15: Which level of the energy pyramid contains the MOST available energy?

Tertiary consumers
Secondary consumers
Primary consumers
Producers (Correct answer)

Correct answer: Producers

Producers (plants) capture solar energy and have the most energy available in the pyramid.

Question 16: Which graph represents the solution to x − 4 < 2?

An open circle at 6 with shading to the left (Correct answer)
An open circle at 6 with shading to the right
A closed circle at 6 with shading to the right
A closed circle at 6 with shading to the left

Correct answer: An open circle at 6 with shading to the left

Solving gives x < 6, which is graphed as an open circle at 6 with shading to the left.

Question 17: What is the approximate scaled score range used to report Keystone Exam results?

400–1600
0–100
1100–1600 (Correct answer)
200–800

Correct answer: 1100–1600

Keystone Exam scaled scores range from 1100 to 1600 across all tested subjects.

Question 18: The right to petition the government, protected by the First Amendment, allows citizens to:

Override government decisions with enough signatures
Demand government officials resign from office
Formally request government action or change through signed documents (Correct answer)
Sue the government without restriction

Correct answer: Formally request government action or change through signed documents

The right to petition allows citizens to formally address grievances to the government through letters, signed petitions, or other communications requesting action.

Question 19: What does 'due process of law' guarantee to citizens?

Unlimited access to legal representation at no cost
The right to vote in all elections
Freedom from all government surveillance
Fair treatment through the judicial system before rights are denied (Correct answer)

Correct answer: Fair treatment through the judicial system before rights are denied

Due process, protected by the 5th and 14th Amendments, ensures that the government must follow fair procedures before depriving someone of life, liberty, or property.

Question 20: A DNA strand reads 3'-TACGGA-5'. What is the complementary mRNA sequence?

3'-AUGCCU-5'
3'-TACGGA-5'
5'-UACGGA-3'
5'-AUGCCU-3' (Correct answer)

Correct answer: 5'-AUGCCU-3'

mRNA is synthesized antiparallel to the DNA template, replacing thymine (T) with uracil (U): 3'-TACGGA-5' → 5'-AUGCCU-3'.

Question 21: In classical drama, what distinguishes a tragedy from a comedy?

Comedies never include serious themes, while tragedies never include humor
Tragedies are always shorter in length than comedies
Tragedies end in suffering or death for the protagonist, while comedies end happily (Correct answer)
Comedies involve royalty while tragedies involve common people

Correct answer: Tragedies end in suffering or death for the protagonist, while comedies end happily

In classical drama, tragedies typically end with the downfall or death of the protagonist, while comedies resolve conflicts and end on a happy or celebratory note.

Question 22: What is the role of RNA polymerase during transcription?

Translates mRNA into protein
Splices introns from pre-mRNA
Unwinds DNA and synthesizes an mRNA strand (Correct answer)
Replicates DNA before cell division

Correct answer: Unwinds DNA and synthesizes an mRNA strand

RNA polymerase reads the DNA template strand and synthesizes a complementary mRNA molecule.

Question 23: What is dramatic irony?

When characters use exaggerated language to express strong emotion
When the audience knows something important that one or more characters do not know (Correct answer)
When two characters hold opposing viewpoints about an issue
When a character says the opposite of what they mean

Correct answer: When the audience knows something important that one or more characters do not know

Dramatic irony occurs when the audience possesses knowledge that the characters in the story lack, creating tension, suspense, or humor.

Question 24: During lactic acid fermentation in human muscle cells, what happens to pyruvate?

It is converted to ethanol
It enters the Krebs cycle
It is broken down into CO2 and water
It is converted to lactic acid to regenerate NAD+ (Correct answer)

Correct answer: It is converted to lactic acid to regenerate NAD+

In lactic acid fermentation, pyruvate accepts electrons from NADH and is reduced to lactic acid, regenerating NAD+ so glycolysis can continue.

Question 25: Two species of birds live in the same area but mate at different times of year, preventing interbreeding. This is an example of:

Behavioral isolation
Postzygotic isolation
Temporal isolation (Correct answer)
Gametic isolation

Correct answer: Temporal isolation

Temporal isolation is a prezygotic barrier where species breed at different times (seasons, times of day) and thus never interbreed.

Question 26: What is the slope of the line represented by the equation 𝑦=3𝑥−2?

3 (Correct answer)
0
-2
1

Correct answer: 3

The equation y = 3x - 2 is in the slope-intercept form, which is y = mx + b. In this form, 'm' represents the slope of the line and 'b' represents the y-intercept. Therefore, by comparing the given equation to the slope-intercept form, we can directly identify that the slope (m) is 3.

Question 27: In analyzing conflict, an external conflict would best be described as:

A character questioning their own identity
A character battling a fear of failure
A character competing against a rival for a scholarship (Correct answer)
A character struggling with guilt over a past decision

Correct answer: A character competing against a rival for a scholarship

External conflict involves a struggle between a character and an outside force, such as another person.

Question 28: Which evidence most strongly supports the common ancestry of all living organisms?

Universal use of the same genetic code (DNA/RNA/protein) (Correct answer)
All organisms requiring sunlight
Similar ecosystems on different continents
Similar body sizes across species

Correct answer: Universal use of the same genetic code (DNA/RNA/protein)

The near-universal genetic code—where the same codons specify the same amino acids across all life—strongly indicates common ancestry.

Question 29: Which graph represents a function that is decreasing over its entire domain?

y = -3x + 1 (Correct answer)
y = 2x + 3
y = |x|
y = x²

Correct answer: y = -3x + 1

y = -3x + 1 has a negative slope (-3), so it decreases everywhere.

Question 30: Which principle means that the government must follow established laws and cannot act arbitrarily?

Rule of law (Correct answer)
Popular sovereignty
Separation of powers
Federalism

Correct answer: Rule of law

The rule of law means no person — including government officials — is above the law.

Question 31: What does a phylogenetic tree's branch length typically represent?

Amount of evolutionary change (Correct answer)
Geographic distance between species
Time since speciation only
Number of species in a clade

Correct answer: Amount of evolutionary change

Branch lengths on most phylogenetic trees represent the amount of evolutionary change (mutations) along that lineage.

Question 32: A linear function's graph has a y-intercept of 6 and passes through (3, 0). What is the slope?

3
2
-2 (Correct answer)
-3

Correct answer: -2

Slope = (0 - 6) / (3 - 0) = -6/3 = -2.

Question 33: Which of the following is a concurrent power shared by both federal and state governments?

Collecting taxes (Correct answer)
Coining money
Regulating immigration
Declaring war

Correct answer: Collecting taxes

Both the federal government and state governments have the power to levy and collect taxes.

Question 34: What is primary succession?

The change of one species into another
Recovery of an ecosystem after a disturbance
The migration of organisms to new habitats
Ecological change beginning in an area with no prior life (Correct answer)

Correct answer: Ecological change beginning in an area with no prior life

Primary succession occurs on bare rock or newly exposed land with no existing soil or organisms.

Question 35: Which process moves substances across the cell membrane WITHOUT using energy, moving from high to low concentration?

Sodium-potassium pump
Active transport
Passive diffusion (Correct answer)
Endocytosis

Correct answer: Passive diffusion

Passive diffusion moves substances down their concentration gradient from high to low concentration without requiring cellular energy.

Question 36: The table below shows some values for a function, f(x). Which of the following statements best describes this function? | x | f(x) | |---|---| | -2| 4 | | -1| 1 | | 0 | 0 | | 1 | 1 | | 2 | 4 |

It is a linear function because the x-values increase at a constant rate.
It is not a function because the f(x) values of 1 and 4 are repeated.
It is a nonlinear function because the rate of change is not constant. (Correct answer)
It is a linear function because it passes the vertical line test.

Correct answer: It is a nonlinear function because the rate of change is not constant.

A function is linear if the rate of change (slope) between any two points is constant. From x=-2 to x=-1, the change in f(x) is 1-4 = -3. From x=-1 to x=0, the change is 0-1 = -1. Since the rate of change is not constant, the function is nonlinear. The repetition of f(x) values does not disqualify it from being a function.

Question 37: What is the overarching purpose of requiring Keystone Exams for Pennsylvania graduation?

To ensure students demonstrate minimum competency in core academic subjects before receiving a diploma (Correct answer)
To determine teacher salary bonuses
To replace all classroom grades with a single standardized measure
To rank Pennsylvania schools against other states for federal funding

Correct answer: To ensure students demonstrate minimum competency in core academic subjects before receiving a diploma

Keystone Exams serve as a graduation requirement to verify that students have achieved minimum competency in core academic areas.

Question 38: A third-person omniscient narrator differs from a third-person limited narrator because the omniscient narrator:

Only describes external actions without revealing any inner thoughts
Speaks directly to the reader as 'you'
Can access the thoughts and feelings of all characters (Correct answer)
Uses the pronoun 'I' to tell the story

Correct answer: Can access the thoughts and feelings of all characters

An omniscient narrator has god-like knowledge of all characters' inner lives, while a limited narrator stays close to one character's perspective.

Question 39: During alcoholic fermentation in yeast, glucose is ultimately converted into which two products?

Acetyl-CoA and NADH
Pyruvate and water
Lactic acid and CO2
Ethanol and CO2 (Correct answer)

Correct answer: Ethanol and CO2

In alcoholic fermentation, yeast converts pyruvate into ethanol and carbon dioxide while regenerating NAD+ to sustain glycolysis.

Question 40: What is a negative feedback loop in homeostasis?

A mechanism for genetic mutation
A response that counteracts a change to restore balance (Correct answer)
A response that amplifies a change
A process that stops cell division

Correct answer: A response that counteracts a change to restore balance

Negative feedback loops detect a deviation and trigger responses that bring the system back to its set point.

Question 41: What does the term 'theme' refer to in a literary work?

The setting and time period in which the story takes place
The central message or insight about human life conveyed by the work (Correct answer)
The main conflict between a protagonist and an opposing force
The sequence of events that make up the story's plot

Correct answer: The central message or insight about human life conveyed by the work

A theme is the underlying message or universal truth about human experience that the author conveys through the events, characters, and imagery of the work.

Question 42: A student is asked to evaluate whether an argument is valid. After reading the text, the student finds that the author's conclusion does not logically follow from the evidence provided. This is called:

A non sequitur or logical fallacy (Correct answer)
An effective use of pathos
A concession
Sound reasoning

Correct answer: A non sequitur or logical fallacy

When a conclusion does not follow logically from the premises, the argument contains a non sequitur, a fundamental logical fallacy.

Question 43: In an informational text, subheadings, bold terms, and sidebars are best described as:

Evidence that supports the central claim
Literary devices that create mood
Text features that aid navigation and comprehension (Correct answer)
Examples of the author's style and voice

Correct answer: Text features that aid navigation and comprehension

Text features like subheadings and bold terms are structural tools that help readers locate information and identify key concepts.

Question 44: Which point lies on the line y = −2x + 8?

(3, 2)
(0, −8)
(2, 3)
(4, 0) (Correct answer)

Correct answer: (4, 0)

Substituting x = 4: y = −2(4) + 8 = −8 + 8 = 0, so (4, 0) is on the line.

Question 45: Which of the following describes a key difference between the Keystone Exams and the PSSA?

The PSSA is given to high school students only
The PSSA is a graduation requirement but Keystones are optional
Keystones cover only math while the PSSA covers all subjects
The Keystone Exams are end-of-course tests for high school while the PSSA tests grades 3-8 (Correct answer)

Correct answer: The Keystone Exams are end-of-course tests for high school while the PSSA tests grades 3-8

PSSAs assess students in grades 3–8 in multiple subjects, while Keystones are end-of-course exams used as high school graduation requirements.

Question 46: When an author uses the phrase 'on the other hand' in a nonfiction essay, this signal word most likely indicates which organizational pattern?

Problem and solution
Chronological order
Compare and contrast (Correct answer)
Cause and effect

Correct answer: Compare and contrast

'On the other hand' is a transition signal that introduces a contrasting idea, indicating a compare-and-contrast structure.

Question 47: A plant cell placed in a hypertonic solution will undergo plasmolysis. What does this mean?

The cell wall breaks down
The cell membrane ruptures from excess water
The cell membrane pulls away from the cell wall as water leaves (Correct answer)
The chloroplasts stop photosynthesizing

Correct answer: The cell membrane pulls away from the cell wall as water leaves

Plasmolysis occurs when water exits a plant cell placed in hypertonic solution, causing the cell membrane to shrink and pull away from the rigid cell wall.

Question 48: An author writing about climate change uses the phrase 'devastating catastrophe.' Which technique does this word choice demonstrate?

Passive voice
Loaded language (Correct answer)
Understatement
Jargon

Correct answer: Loaded language

Loaded language uses emotionally charged words to influence the reader's feelings rather than relying solely on logical evidence.

Question 49: The Keystone Exam often asks students to identify the 'central idea' of a nonfiction passage. The central idea is best described as:

The main point the author develops throughout the entire text (Correct answer)
The first sentence of the first paragraph
The topic sentence of the conclusion
The most interesting detail in the passage

Correct answer: The main point the author develops throughout the entire text

The central idea is the overarching point that the author develops and supports across the whole text, not just in one paragraph.

Question 50: Which organelle is primarily responsible for producing ATP through aerobic respiration?

Mitochondrion (Correct answer)
Nucleus
Vacuole
Ribosome

Correct answer: Mitochondrion

The mitochondrion is the site of the Krebs cycle and electron transport chain, producing the majority of ATP in aerobic respiration.

Pennsylvania Keystone Test

The Pennsylvania Keystone Exams are end-of-course assessments in Algebra I, Literature, and Biology, required for high school graduation. Each exam consists of two modules with multiple-choice and constructed-response questions. Students must score Proficient (1500+) on each subject or meet the composite pathway (combined score ≥ 4452). No fixed time limit — typically 90 minutes per module.

Questions

180 min

Time Limit

60%

To Pass

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