The AP Biology exam is one of the most popular AP science tests and covers a wide range of topics — from cell biology to ecology. Success on this exam can earn you college credit, boost your GPA, and strengthen your college applications.
In this guide, we’ll break down the exam format, scoring, and key topics you need to know, while showing you how RevisionDojo can help you prepare effectively.
AP Biology Exam Format
The exam is 3 hours long and divided into two main sections:
Section I: Multiple Choice (MCQ)
- 60 questions
- Time: 90 minutes
- Weight: 50% of total score
- Includes both independent questions and question sets based on data, experiments, or diagrams.
Section II: Free Response (FRQ)
- 6 questions total:
- 2 long free-response questions
- 4 short free-response questions
- Time: 90 minutes
- Weight: 50% of total score
- Requires data analysis, experimental design, and applying biological concepts.
AP Biology Exam Topics
The College Board organizes AP Biology content into 8 Units, each weighted differently on the exam:
- Chemistry of Life – 8–11%
- Cell Structure and Function – 10–13%
- – 12–16%
