AP Biology, one topic at a time
The exam is the afternoon of Monday, May 3, 2027: 60 multiple-choice and 6 free-response questions in 3 hr. Ashore has a short lesson for every topic in all 8 units, each ending with a few questions on what it taught. Practice sets and mock exams for Biology are on the way.
Exam day
May 3
2027 Monday · Afternoon
- 60 multiple choice · 90 min
- 6 free response · 90 min
- Scored 1 to 5
What's on the May 2027 exam
How the exam is split, how long each part runs and what you can use.
How students scored in May 2026
| Scored 5 | Scored 4 | Scored 3 | Scored 2 | Scored 1 |
|---|---|---|---|---|
| 15% | 25% | 31% | 21% | 8% |
Source: College Board score distributions. Compare all 40 AP exams
AP Biology score calculator: enter your section results and see an estimated 1–5 score.
All 8 units
Percentages are the College Board's ranges for how much of the multiple-choice section each unit can be.
Unit 1 · 8–11%
Chemistry of Life
Structure of Water and Hydrogen Bonding · Elements of Life · Introduction to Macromolecules · Carbohydrates · Lipids · Nucleic Acids · Proteins
Unit 2 · 10–13%
Cells
Cell Structure and Function · Cell Size · Plasma Membrane · Membrane Permeability · Membrane Transport · Facilitated Diffusion · Tonicity and Osmoregulation · Mechanisms of Transport · Cell Compartmentalization · Origins of Cell Compartmentalization
Unit 3 · 12–16%
Cellular Energetics
Enzymes · Environmental Impacts on Enzyme Function · Cellular Energy · Photosynthesis · Cellular Respiration
Unit 4 · 10–15%
Cell Communication and Cell Cycle
Cell Communication · Introduction to Signal Transduction · Signal Transduction Pathways · Feedback · Cell Cycle · Regulation of Cell Cycle
Unit 5 · 8–11%
Heredity
Meiosis · Meiosis and Genetic Diversity · Mendelian Genetics · Non-Mendelian Genetics · Environmental Effects on Phenotype
Unit 6 · 12–16%
Gene Expression and Regulation
DNA and RNA Structure · DNA Replication · Transcription and RNA Processing · Translation · Regulation of Gene Expression · Gene Expression and Cell Specialization · Mutations · Biotechnology
Unit 7 · 13–20%
Natural Selection
Introduction to Natural Selection · Natural Selection · Artificial Selection · Population Genetics · Hardy–Weinberg Equilibrium · Evidence of Evolution · Common Ancestry · Continuing Evolution · Phylogeny · Speciation · Variations in Populations · Origins of Life on Earth
Unit 8 · 10–15%
Ecology
Responses to the Environment · Energy Flow Through Ecosystems · Population Ecology · Effect of Density on Populations · Community Ecology · Biodiversity · Disruptions in Ecosystems
How you'll study Biology
The lessons are live now. The parts marked Coming soon open later.
A lesson for every topic
Each one explains a single idea step by step, then checks it with a few questions.
- Coming soon
Practice on each topic
Questions build from easy to exam level. Any you miss come back as similar ones 1, 3 and 7 days later.
- Coming soon
Free response
Write under the exam timer, then score each answer point by point, the way an AP reader would.
- Coming soon
Mock exams and a predicted score
Same sections, time limits and calculator rules as the May exam. Every set and mock updates your predicted 1 to 5.
Pricing
Start free, then try everything for a week
One plan opens every lesson and question for every AP course and both SAT sections. The starting check is free, and monthly and 3-month plans start with a 7-day free trial.
Recommended
Free
Find where you lose points and get a plan to test day.
$0
No card needed.
- Starting check and full report
- A study plan to your test date
- One free practice day a week: 3 lessons, 60 questions
Monthly
Every lesson and question, month to month.
$99a month
Billed monthly
$0 today, then $99 a month after 7 days, until you cancel.
Everything in Free, plus:
- Every lesson in every course
- Every practice question, no limits
- Every mistake and flashcard, every day
Every 3 months
A steady term of prep, with the SAT score guarantee.
$66a month
Save 33% vs monthly$199 every 3 months
$0 today, then $199 every 3 months after 7 days, until you cancel.
Everything in Free, plus:
- Every lesson in every course
- Every practice question, no limits
- Every mistake and flashcard, every day
Season pass
Everything through test day, in one payment.
$37a month
Save 63% vs monthly$249 once, early price · $299 from Jan 1
One payment, good through Jun 5, 2027. No trial, and it doesn't renew.
Everything in Free, plus:
- Every lesson in every course
- Every practice question, no limits
- Every mistake and flashcard, every day
- No card for the starting check
- 7-day free trial on monthly and 3-month plans, cancel anytime
- Season pass never renews
- SAT score guarantee on the 3-month plan and season pass
Start Biology at Unit 1
Free to start, no card. Up to 3 new lessons on your free practice day each week, or every lesson on any paid plan.
Starting check
SAT Math · 1 of 5
Calculator allowed
- A
- B
- C
- D