Aerobic respiration: glycolysis and the Krebs cycle

Aerobic respiration: glycolysis and the Krebs cycle Quiz

Spec 7.3–5 · Edexcel A-Level Biology A: Quiz

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  1. 1. What is the net ATP gain from glycolysis per glucose?

    • A. 4
    • B. 0
    • C. 6
    • D. 2

  2. 2. What is the role of pyruvate in anaerobic respiration in animals?

    • A. It makes ATP directly
    • B. It accepts hydrogen from reduced NAD, forming lactate
    • C. It is converted to acetyl CoA
    • D. It releases CO₂

  3. 3. How many reduced NAD are made in the Krebs cycle from one glucose molecule?

    • A. 6
    • B. 3
    • C. 8
    • D. 10

  4. 4. Which process occurs in the link reaction?

    • A. Phosphorylation of glucose
    • B. Formation of lactate
    • C. Decarboxylation and dehydrogenation of pyruvate
    • D. Regeneration of oxaloacetate

  5. 5. In a respirometer, why is soda lime included?

    • A. To absorb CO₂ so only oxygen uptake changes the pressure
    • B. To provide oxygen
    • C. To keep the temperature constant
    • D. To kill bacteria

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