Unit 2: Cell Structure and Function

AP Biology — 8 practice questions with detailed explanations. Use the links below to open each full question page (ideal for search indexing and deep study).

Unit summary

This unit covers core ideas tested on the AP exam. Each listed item links to a standalone page with the full stem, answer choices where applicable, a step-by-step explanation, and the correct answer. Difficulty labels help you prioritize review.

Questions in this unit

Sample prompts

Short previews of topics covered (not full question text).

  • Pancreatic cells secrete insulin into the bloodstream. Which cellular process is…
  • According to the endosymbiotic theory, which evidence supports the claim that mi…
  • Which advantage does the compartmentalization of eukaryotic cells provide?…
  • Which molecule can most easily diffuse directly through the phospholipid bilayer…
  • Which statement correctly describes facilitated diffusion?…
  • A red blood cell is placed in a solution containing 0.9% NaCl. The cell maintain…
  • A researcher observes that small cells generally have a higher metabolic rate th…
  • Which cellular structure is present in both prokaryotic and eukaryotic cells?…