The AP Biology exam is one of the most challenging AP science tests, covering molecular biology, ecology, evolution, and more. A high score can earn you college credit and demonstrate strong STEM readiness.
This AP Bio study guide will walk you through the exam structure, core units, essential skills, and proven strategies — plus how RevisionDojo can help you prepare smarter, not harder.
AP Biology Exam Structure
The exam is 3 hours long, split into two sections:
Section I: Multiple Choice (MCQ)
- 60 questions, 90 minutes
- 50% of total score
- Questions often include charts, experimental data, and graphs
Section II: Free Response (FRQ)
- 6 questions total:
- 2 long free-response (one lab-based, one conceptual)
- 4 short-answer questions
- 90 minutes
- 50% of total score
AP Biology Units & Weighting
The College Board organizes AP Bio into 8 units:
- Chemistry of Life (8–11%)
- Cell Structure & Function (10–13%)
- Cellular Energetics (12–16%)
- Cell Communication & Cell Cycle (10–15%)
- Heredity (8–11%)
- Gene Expression & Regulation (12–16%)
- Natural Selection (13–20%)
- Ecology (10–15%)
Essential Skills for AP Biology
The exam tests not just knowledge, but the ability to:
- Analyze Data — interpret experimental results, graphs, and statistical calculations
- Design Experiments — propose methods and controls for lab-based questions
- Apply Biological Concepts — connect different topics across units
- Use Scientific Reasoning — explain cause-and-effect relationships in biology
High-Impact AP Bio Study Strategies
- Master the Lab Experiments — Be familiar with all 13 AP Biology labs and their principles.
- Practice with Data-Based Questions — Many MCQs are graph or table-based.
- Learn Key Vocabulary in Context — Don’t just memorize; apply terms in explanations.
- Do Timed FRQs Weekly — Build speed and clarity in written responses.
- Review Past Exams — The College Board provides released questions to practice.
How to Use This AP Bio Study Guide Effectively
- Start with unit-by-unit review and align with the weighting for priority.
- Mix content review with practice problems every study session.
- Schedule at least two full-length practice exams before test day.
- Use a formula sheet for statistical tests (Chi-square, t-test, standard error).
How RevisionDojo Helps You Ace AP Bio
RevisionDojo provides:
- Full-Length AP Biology Practice Exams with detailed explanations
- Topic-Specific Question Banks for every AP Bio unit
- FRQ Practice with Rubric Feedback
- Lab-Based Question Drills to master experimental design
- Performance Tracking to target your weakest areas
And when you want to see where your AP Bio score can take you:
- University Match Quiz — Find schools that reward high AP Bio scores.
- Universities Directory — Check AP credit policies and requirements.
FAQ – AP Bio Study Guide
1. How many hours should I study for AP Biology?
Most students need 80–120 hours over the school year, plus targeted review before the exam.
2. What’s the hardest AP Bio unit?
Many find Unit 6 (Gene Expression & Regulation) challenging due to complexity.
3. Can I use a calculator on the AP Bio exam?
Yes — a four-function calculator is allowed for both sections.
4. How do I prepare for the FRQs?
Practice writing concise, direct answers supported by evidence.
5. Are labs guaranteed to appear on the exam?
Yes — lab-based reasoning is a major component of both MCQs and FRQs.
6. Is AP Bio harder than AP Chem?
They’re different — AP Bio has more memorization and concept application, while AP Chem has heavier math.
Turn AP Bio Prep Into AP Bio Success with RevisionDojo
Don’t just study — study smart.
🎯 Take the University Match Quiz to see which universities give credit for AP Biology.
🌍 Explore the Universities Directory for global credit and admissions info.
