The Calvin cycle

The Calvin cycle Quiz

Spec 5.8 · Edexcel A-Level Biology A: Quiz

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5 questions, one answer each

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  1. 1. What is the 5-carbon compound that combines with carbon dioxide?

    • A. GP
    • B. RuBP
    • C. GALP
    • D. Glucose

  2. 2. How many molecules of GP are formed when one molecule of carbon dioxide is fixed?

    • A. 1
    • B. 3
    • C. 6
    • D. 2

  3. 3. Which substances are needed to reduce GP to GALP?

    • A. ATP and reduced NADP
    • B. Rubisco and oxygen
    • C. Water and NADP
    • D. ADP and Pi

  4. 4. What happens to the concentration of RuBP when the CO₂ supply to the cycle is cut off in bright light?

    • A. It falls as it is used up
    • B. It rises as it is no longer used
    • C. It stays at zero
    • D. It falls to zero immediately

  5. 5. Which molecule is made using GALP-derived glycerol?

    • A. Starch
    • B. DNA
    • C. A triglyceride
    • D. A protein

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