Multiple choice
60 questions · 1 hour 30 minutes · 50%
← All AP courses
AP Biology exam prep
Connect molecular mechanisms, cellular systems, heredity, evolution, energetics, ecology, experiments, and data analysis across the course's four big ideas.
AP8units
AP Biology exam format
Hybrid digital. Formats can change, so verify the linked official page before exam day.
Official College Board exam page ↗Free response
6 questions · 1 hour 30 minutes · 50%
AP Biology unit roadmap
Each unit is a connected part of the course, not an isolated chapter. The focus says what you must know and the weighting says how much exam time it is worth. Use the weighting to order your review, never as permission to skip a prerequisite.
Chemistry of Life
Water, macromolecules, structure and function
- Define the vocabulary you need to explain water, macromolecules, structure and function.
- Draw and label the graph, model, diagram, or evidence that best represents chemistry of life.
- Solve one direct chemistry of life question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Experimental controls and variables
Cell Structure and Function
Membranes, transport, compartmentalization
- Define the vocabulary you need to explain membranes, transport, compartmentalization.
- Draw and label the graph, model, diagram, or evidence that best represents cell structure and function.
- Solve one direct cell structure and function question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Graphing with uncertainty
Cellular Energetics
Enzymes, photosynthesis, respiration
- Define the vocabulary you need to explain enzymes, photosynthesis, respiration.
- Draw and label the graph, model, diagram, or evidence that best represents cellular energetics.
- Solve one direct cellular energetics question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Mechanism-based explanations
Cell Communication and Cell Cycle
Signaling, feedback, mitosis
- Define the vocabulary you need to explain signaling, feedback, mitosis.
- Draw and label the graph, model, diagram, or evidence that best represents cell communication and cell cycle.
- Solve one direct cell communication and cell cycle question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Evolution as the unifying idea
Heredity
Meiosis, Mendelian and non-Mendelian inheritance
- Define the vocabulary you need to explain meiosis, mendelian and non-mendelian inheritance.
- Draw and label the graph, model, diagram, or evidence that best represents heredity.
- Solve one direct heredity question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Connecting scales from molecule to ecosystem
Gene Expression and Regulation
DNA, RNA, biotechnology, regulation
- Define the vocabulary you need to explain dna, rna, biotechnology, regulation.
- Draw and label the graph, model, diagram, or evidence that best represents gene expression and regulation.
- Solve one direct gene expression and regulation question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Experimental controls and variables
Natural Selection
Evolution, populations, phylogeny
- Define the vocabulary you need to explain evolution, populations, phylogeny.
- Draw and label the graph, model, diagram, or evidence that best represents natural selection.
- Solve one direct natural selection question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Graphing with uncertainty
Ecology
Energy flow, populations, communities, biodiversity
- Define the vocabulary you need to explain energy flow, populations, communities, biodiversity.
- Draw and label the graph, model, diagram, or evidence that best represents ecology.
- Solve one direct ecology question, then change one assumption and predict how the answer moves.
- Tie this unit to the course priority: Mechanism-based explanations
Use a diagnostic to find the first knowledge gap
This short check is not a score prediction. It identifies which part of the course deserves your next focused session.
- Answer without notes.
- Explain your choice before revealing feedback.
- Record every uncertain answer, including lucky guesses.
Question 1 of 3
Scored skills for the AP Biology exam
Knowing an idea internally is not enough. Practice producing observable evidence under time pressure.
Explain biological concepts and processes
Analyze visual representations
Design and evaluate investigations
Represent and analyze data
Perform quantitative analysis
Develop evidence-based explanations
Highest-value review targets
- Experimental controls and variables
- Graphing with uncertainty
- Mechanism-based explanations
- Evolution as the unifying idea
- Connecting scales from molecule to ecosystem
AP Biology formulas and reference relationships
A useful sheet records meaning and conditions, not isolated symbols. Rebuild it from a blank page until every line comes back with its conditions attached.
Hardy–Weinberg equilibrium
\[p+q=1,\qquad p^2+2pq+q^2=1\]
What it tells you: Connects two allele frequencies to expected genotype frequencies.
Use it when: Assumes a large randomly mating population without selection, migration, mutation, or drift.
Example: If $q=.2$, the expected heterozygote frequency is $2(.8)(.2)=.32$.
Water potential
\[\Psi=\Psi_s+\Psi_p,\qquad \Psi_s=-iCRT\]
What it tells you: Predicts net water movement using solute and pressure potential.
Use it when: Use absolute temperature and compatible pressure units; pure water at standard pressure has $\Psi=0$.
Example: Water moves from higher water potential toward lower water potential.
Chi-square statistic
\[\chi^2=\sum\frac{(O-E)^2}{E}\]
What it tells you: Compares observed categorical counts with counts expected by a model.
Use it when: Expected counts should be sufficiently large and degrees of freedom must match the categories and estimated parameters.
Example: Observed Mendelian counts can be tested against a $3:1$ expectation.
Population growth rate
\[\frac{\Delta N}{\Delta t}=B-D+I-E\]
What it tells you: Balances births, deaths, immigration, and emigration over time.
Use it when: Every term must refer to the same population and time interval.
Example: If births plus immigration exceed deaths plus emigration, population size increases.
What the AP Biology exam hands you, and what you have to recall
| Section or part | What you may use | What that means for your work |
|---|---|---|
| Multiple choice | Four-function, scientific, or graphing calculator | Most items need no calculator at all; the ones that do are short - rates, percentages, and ratios. |
| Free response | Four-function, scientific, or graphing calculator | Used for chi-square, standard error, and Hardy-Weinberg arithmetic. |
| Provided for the whole exam | Formula and equation sheet | Chi-square, standard error, Hardy-Weinberg, and the surface-area formulas are given. Learn when each applies, not how each looks. |
Anything the table does not hand you, you have to remember. The AP Biology study plan puts these rules on a week-by-week schedule.
Your AP Biology preparation plan
Repeat this loop weekly: retrieve, diagnose, repair, mix, time, and reflect.
01
AP-style practice
Original questions, immediate explanations, and local progress.
Start →02Full course test
A timed mixed-unit test with a complete answer review.
Test →03Study plan and strategy
Eight weeks, plus the timing, calculator, and task-verb decisions.
Plan →04Unit roadmap
Every unit, its weighting, and what mastery looks like.
Review →05Formula review
Key relationships, their conditions, and what the exam provides.
Recall →Questions about the AP Biology exam
Can I use a graphing calculator on the AP Biology exam?
Rules change from section to section. Multiple choice: four-function, scientific, or graphing calculator. Free response: four-function, scientific, or graphing calculator. Provided for the whole exam: formula and equation sheet. Practise each section under its own rule.
How long is the AP Biology exam?
Multiple choice: 1 hour 30 minutes, 60 questions. Free response: 1 hour 30 minutes, 6 questions. Multiple choice — About 1.5 minutes each. Many items sit under a data set or a graph, so read the axes before the question. Free response — About 15 minutes each, but they are not equal - the long data-analysis questions deserve more than the short ones.
Which AP Biology unit is weighted most heavily?
Natural Selection (13–20%) carries the largest published weighting. Use the weighting to order your review, not to skip a prerequisite that a heavier unit depends on.
Is a formula sheet given on the AP Biology exam?
Yes. The AP Biology exam gives you the formula and equation sheet. Chi-square, standard error, Hardy-Weinberg, and the surface-area formulas are given. Learn when each applies, not how each looks.
Use AI responsibly during AP exam preparation
Attempt first. Ask for a hint or critique. Close the explanation and solve again from memory. Never use outside help on a live or prohibited assessment.
Turn the guide into exam-day skill
Start a focused AP Biology practice set, check each explanation, and use every miss to choose your next review session.
MathGPT.now is independent and is not affiliated with or endorsed by College Board. Exam formats can change.
Verify AP Biology information on AP Central ↗