AP Biology Practice Tests

AP Biology Practice Tests

AP Biology challenges students to think like scientists while exploring the fundamental principles that unify living systems. The course builds scientific reasoning skills comparable to a two-semester college sequence. Use these free AP Biology practice tests to review key concepts for the exam.

Free AP Biology Practice Tests

Unit 1: Chemistry of Life

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Unit 2: Cell Structure

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Unit 3: Cellular Energetics

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Unit 4: Cell Communication

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Unit 5: Heredity

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Unit 6: Gene Expression

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Unit 7: Natural Selection

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Unit 8: Ecology

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AP Biology Overview

Section I: Multiple Choice

  • 60 Questions
  • 90 Minutes
  • 50% of Total Exam Score
  • Includes Standalone Questions
  • Includes Questions in Sets of 4–5

Section II: Free Response

  • 6 Questions
  • 90 Minutes
  • 50% of Total Exam Score
  • 2 Long Questions
  • 4 Short Questions

About the
AP Biology Test

The AP Biology exam is a College Board assessment for high school students who have completed the AP Biology course, which is designed to mirror an introductory college-level biology class. The course is well-suited for students considering careers in medicine, veterinary science, bioengineering, or environmental science, and it builds core understanding across cells, genetics, physiology, evolution, and ecology.

Exam Format

The exam is 2 hours and 40 minutes long and consists of two sections — multiple choice and free response. The exam is fully digital, administered through the College Board’s Bluebook app, with all responses automatically submitted at the end of the exam. No calculator or reference sheet is provided.

Section I – Multiple Choice (90 minutes | 50% of score)

This section contains 60 questions. Questions are a mix of standalone items and discrete sets that refer to the same diagram, graph, data table, or experimental scenario. Each question is worth equal points, and there is no penalty for wrong answers.

Section II – Free Response (90 minutes | 50% of score)

This section contains six questions total: two long free-response questions and four short-answer questions. Answers must be written in paragraph form — outlines, bulleted lists, or diagrams alone are not acceptable, though labeled diagrams may be used to supplement a written response.

Long-Answer Questions (2 questions | 9 points each)

Both long questions center on the interpretation and evaluation of experimental results. Each question targets a distinct focus area:

  • Question 1: Experimental Analysis and Argumentation — Students interpret data from a described experiment, draw evidence-based conclusions, and construct a multi-part written argument connecting findings to broader biological concepts and principles.
  • Question 2: Graphing and Data Representation — Students construct a graph from provided data (with proper axes, labels, and units) and analyze experimental results, including evaluating design, identifying variables, or predicting outcomes under altered conditions.

Short-Answer Questions (4 questions | 4 points each)

Each of the four short-answer questions focuses on a different Big Idea and a different unit of instruction. According to the College Board, the four short-answer questions are designed to assess the following skill areas:

  • Question 3: Scientific Investigation — Students may be asked to identify variables, describe controls, predict outcomes, or evaluate the design of an experiment.
  • Question 4: Conceptual Analysis — Students explain or apply a biological concept, process, or principle, often in a novel context.
  • Question 5: Analysis of a Model or Visual Representation — Students interpret a diagram, figure, or biological model and explain what it shows or predict what would happen under changed conditions.
  • Question 6: Analysis of Data — Students read and interpret quantitative or qualitative data (graphs, tables, or charts) and draw conclusions supported by evidence.

Scoring
Scores range from 1 to 5. Many colleges and universities award course credit or advanced placement for scores of 3 or higher, though policies vary by institution. Scores are typically released in July following the May exam administration.

Content & Big Ideas
The exam is organized around four overarching "Big Ideas":

  1. Evolution — Natural selection and other evolutionary mechanisms drive the diversity of life.
  2. Energetics — Biological systems require energy and matter to grow, reproduce, and maintain homeostasis.
  3. Information Storage and Transmission — Genetic information flows within and between organisms.
  4. System Interactions — Biological systems interact and are influenced by their environment.

The course is concept-driven and built on sequential units, with crosscutting themes that connect content across all Big Ideas.

Science Practices
Beyond content knowledge, AP Biology emphasizes thinking and working like a biologist. The exam is built around six science practices:

  1. Concept Explanation
  2. Visual Representations
  3. Data Analysis
  4. Experimental Design
  5. Mathematical Reasoning
  6. Scientific Argumentation

Lab Component
Hands-on, inquiry-based investigation is a core part of the course. At least a quarter of instructional time is devoted to lab work in which students design or refine procedures, make predictions, collect and analyze data, and communicate their findings.