Study Pitstop

AP Biology

The whole course on one page. Eight units, from the chemistry of life to ecology. Pick a topic; the page shows you which ideas to fix.

8 units · 60 topics · 802 questions · Aligned to the AP Biology Course and Exam Description (effective Fall 2025)

1 Chemistry of Life

2 Cells

3 Cellular Energetics

4 Cell Communication and Cell Cycle

5 Heredity

6 Gene Expression and Regulation

7 Natural Selection

8 Ecology

The AP Biology exam

  • Section I: 60 multiple-choice questions in 1 hour 30 minutes, 50% of your score.
  • Section II: 6 free-response questions (2 long, 4 short) in 1 hour 30 minutes, the rest of your score.

The questions here are multiple choice only. For free response, use the past exam questions College Board publishes.

Exam format from AP Central, checked October 2026.