AP Biology · Free-response questions 2026

6 questions, each with its course unit and the official scoring guidelines.

Official paper (PDF) · QuestionsAll AP Bio papers→

Question 3

Open answer
Question 3 — 3. Cyanide is a chemical that affects the enzyme cytochrome c oxidase (CCO), a key enzyme in the mitochondrial electron transport chain. At high cyanide concentrations, CCO activity is much lower than when no cyanide is…

Source: College Board — AP Biology, Free-response questions, 2026

Question 4

Open answer
Question 4 — 4. The process of meiosis enables animals that reproduce sexually to produce gametes. Part A Describe one characteristic of chromosome movement during Meiosis I. Part B Explain why chromosomes are more visible when…

Source: College Board — AP Biology, Free-response questions, 2026

Question 5

Open answer
Question 5 — 5. Anole lizards throughout the Caribbean islands and Central and South America have pads of varying sizes on the bottom surfaces of their toes. The sizes of the toe pads are genetically determined and not the result of…

Source: College Board — AP Biology, Free-response questions, 2026

Question 6

Open answer
Question 6 — 6. Many raptors in Africa are top predators and keystone species in their ecosystems. Raptor population sizes have been declining in recent years. Scientists studied the relationship between the conversion of the…

Source: College Board — AP Biology, Free-response questions, 2026

Stuck on an exercise?

Our tutors clear up your doubts one to one — online, or in person with a local tutor.

Ask a tutorLessons in AP Bio→