NumicornNumicornLearn, solve, progress

AP Exams · Biology · Science Practices

AP Biology Practice Test

Build AP Biology readiness with original cells, genetics, evolution, ecology, data analysis, and experimental reasoning questions.

AP Biology practice sets

This page provides one canonical AP Biology practice hub with five short sets of 10 original questions each. The sets cover chemistry of life, cells, cellular energetics, communication and heredity, gene expression, natural selection, ecology, experimental design, data analysis, and scientific argumentation.

Skills covered

  • Explain biological concepts, processes, and models
  • Analyze visual representations, data tables, graphs, and experimental results
  • Identify questions, methods, controls, variables, and evidence
  • Use quantitative reasoning and statistical evidence in context
  • Develop and justify scientific arguments using relevant biological evidence

AP Biology course and exam scope

College Board organizes AP Biology into eight units: Chemistry of Life, Cells, Cellular Energetics, Cell Communication and Cell Cycle, Heredity, Gene Expression and Regulation, Natural Selection, and Ecology. The course also emphasizes science practices such as concept explanation, visual representations, questions and methods, data analysis, and argumentation.

College Board’s current exam page describes a hybrid digital exam in which students view questions in Bluebook and handwrite free-response answers in paper booklets. Current information also allows approved calculators on both sections, while 2027 calculator guidance limits handheld calculators with storage capabilities. Check the current official policy before test day.

How to use this page

Start with one untimed set to identify a topic gap, then use timed sets to build pacing. For every missed item, name the biological mechanism, inspect the evidence, and write a conclusion that stays within the experimental conditions.

These questions are original supplemental practice. They are not official College Board questions, secure AP Exam content, AP Classroom assignments, a score predictor, or a substitute for current AP policies and course materials.

For current scope and preparation, review the AP Biology course page, the AP Central course overview, the AP Biology exam page, the AP Biology Course and Exam Description, and the AP calculator policy.

For more study options, visit AP Exam Tests or explore College Readiness Tests, High School Course Tests, and Pomodoro.

Select a test

5 Tests
1. Test2. Test3. Test4. Test5. Test

5. Test

AP Biology Practice Questions

A 10-question AP Biology practice set on ap biology: experimental design, data analysis, and scientific argumentation, with answers and explanations.

Read the biological scenario, model, data, or experimental design carefully. Choose the best answer and review the explanation after each response.

10 Questions
0/100%
Reading settings
Reading settings
Text size
18px
Line spacing
1.70
C 0I 0U 10
1. QuestionMultiple choice

In an experiment, the amount of light is changed while water and plant type are held constant. What is the independent variable?

Please select an answer first.

Correct answer: A

The correct answer is Amount of light.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: The independent variable is the factor deliberately changed by the researcher.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

The independent variable is the factor deliberately changed by the researcher.

2. QuestionMultiple choice

Why include a control group?

Please select an answer first.

Correct answer: B

The correct answer is To provide a comparison for evaluating the treatment effect.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: A control establishes a baseline against which treatment results can be compared.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

A control establishes a baseline against which treatment results can be compared.

3. QuestionMultiple choice

Why are replicated trials valuable?

Please select an answer first.

Correct answer: C

The correct answer is They help assess variation and increase confidence that a pattern is repeatable.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: Replication reveals whether an observed pattern persists across trials.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

Replication reveals whether an observed pattern persists across trials.

4. QuestionMultiple choice

A graph shows treated cells averaging 18 units and control cells averaging 12 units. What is the measured difference?

Please select an answer first.

Correct answer: D

The correct answer is 6 units.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: Subtract 12 from 18 to find a difference of 6 units.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

Subtract 12 from 18 to find a difference of 6 units.

5. QuestionMultiple choice

What does a p-value below a chosen significance level suggest in an experiment?

Please select an answer first.

Correct answer: A

The correct answer is The observed difference would be unusual under the null model.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: A small p-value indicates evidence against the null under the stated assumptions.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

A small p-value indicates evidence against the null under the stated assumptions.

6. QuestionMultiple choice

Which conclusion is appropriately limited?

Please select an answer first.

Correct answer: B

The correct answer is Under the tested conditions, the treatment group had a higher mean than the control group.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: A careful biological conclusion names the conditions and avoids overgeneralization.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

A careful biological conclusion names the conditions and avoids overgeneralization.

7. QuestionMultiple choice

What is the best evidence for the claim that a mutation changes protein function?

Please select an answer first.

Correct answer: C

The correct answer is Cells with the mutation produce a protein with altered activity compared with controls.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: Functional comparison directly tests whether the protein’s activity changed.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

Functional comparison directly tests whether the protein’s activity changed.

8. QuestionMultiple choice

Why should a graph include labeled axes and units?

Please select an answer first.

Correct answer: D

The correct answer is They identify what was measured and allow the magnitude to be interpreted.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: Labels and units give meaning to the numerical pattern.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

Labels and units give meaning to the numerical pattern.

9. QuestionMultiple choice

A researcher changes both temperature and pH in the same treatment. What is a major limitation?

Please select an answer first.

Correct answer: A

The correct answer is The effects of the two variables cannot be separated.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: Changing two explanatory variables creates a confounding problem.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

Changing two explanatory variables creates a confounding problem.

10. QuestionMultiple choice

What makes a scientific argument stronger?

Please select an answer first.

Correct answer: B

The correct answer is A claim supported by relevant data and a biological reasoning mechanism.

  1. Identify the biological system: Determine the process, structure, evidence, or experimental variable described in the AP Biology prompt.
  2. Apply the concept: Strong arguments connect evidence to a claim through a plausible mechanism.
  3. Connect evidence: Check that the conclusion matches the model, data, mechanism, or biological level named in the question.

Strong arguments connect evidence to a claim through a plausible mechanism.

Previous testNext test

Choose your next study path

AP Exam Tests

Browse AP subject practice and exam preparation.

AP Calculus AB & BC Practice

Practice calculus concepts, representations, and exam skills.

AP Statistics Practice

Practice data analysis, probability, inference, and regression.

High School Course Tests

Review biology, chemistry, and other high school topics.

Pomodoro Timer

Use focused study intervals for AP Biology review.

Frequently asked questions about AP Biology Practice Tests

What topics are included on this AP Biology practice page?

The page covers cells, energetics, communication, heredity, gene expression, evolution, ecology, experimental design, data analysis, and scientific argumentation.

Are these official College Board questions?

No. These are original supplemental questions. Use AP Classroom, Bluebook previews, AP Central, and current College Board course materials for official preparation.

Is the AP Biology exam digital?

College Board’s current exam page describes a hybrid digital exam, with questions in Bluebook and handwritten free-response answers in paper booklets.

Can I use a calculator on AP Biology?

Current College Board policy allows approved calculators on both sections, but students should check the latest device restrictions and 2027 updates.

How should I answer a biology data question?

Identify the variables and trend, cite the relevant evidence, connect it to a biological mechanism, and limit the conclusion to the tested conditions.