Oxidative phosphorylation

Oxidative phosphorylation Quiz

Spec 5.4 · Edexcel A-Level Biology B: Quiz

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5 questions, one answer each

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  1. 1. Where is the electron transport chain found in a mitochondrion?

    • A. Matrix
    • B. Outer membrane
    • C. Inner membrane
    • D. Cytoplasm

  2. 2. Which statement describes chemiosmosis?

    • A. ATP is made as protons flow down their gradient through ATP synthase
    • B. ATP is made as electrons flow through ATP synthase
    • C. Protons are pumped using the energy from ATP
    • D. Protons diffuse through the phospholipid bilayer to make ATP

  3. 3. What is the final electron acceptor in aerobic respiration?

    • A. NAD
    • B. ADP
    • C. Pyruvate
    • D. Oxygen

  4. 4. Why is the inner mitochondrial membrane folded into cristae?

    • A. To make room for the matrix
    • B. To increase the surface area for electron transport chains and ATP synthase
    • C. To allow protons to diffuse freely
    • D. To make the outer membrane permeable

  5. 5. A drug makes the inner membrane freely permeable to protons. What is the effect?

    • A. More ATP is made
    • B. Oxygen can no longer be used
    • C. The proton gradient is lost, so less ATP is made
    • D. NADH is no longer produced by the Krebs cycle

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