AP Biology · Free-response questions 2015

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

Official paper (PDF) · QuestionsAll AP Bio papers→

Question 1

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Question 1 — 1. Many species have circadian rhythms that exhibit an approximately 24-hour cycle. Circadian rhythms are controlled by both genetics and environmental conditions, including light. Researchers investigated the effect of…

Source: College Board — AP Biology, Free-response questions, 2015

Question 2

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Question 2 — Figure 1. Glycolysis and pyruvate oxidation Figure 2. Krebs cycle Figure 3 is labeled Electron transport chain. The figure shows a horizontal phospholipid bilayer with four gray shaded rectangles superimposed on the…

Source: College Board — AP Biology, Free-response questions, 2015

Question 3

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Question 3 — 3. The amino acid sequence of cytochrome c was determined for five different species of vertebrates. The table below shows the number of differences in the sequences between each pair of species. THE NUMBER OF AMINO…

Source: College Board — AP Biology, Free-response questions, 2015

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