The link reaction and Krebs cycle

The link reaction and Krebs cycle Quiz

Spec 5.3 · Edexcel A-Level Biology B: Quiz

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  1. 1. Where in the cell do the link reaction and the Krebs cycle take place?

    • A. Cytoplasm
    • B. Mitochondrial matrix
    • C. Inner mitochondrial membrane
    • D. Nucleus

  2. 2. How many molecules of carbon dioxide are released when one pyruvate is completely oxidised?

    • A. 1
    • B. 2
    • C. 4
    • D. 3

  3. 3. Which compound is formed from pyruvate in the link reaction?

    • A. A 2-carbon compound
    • B. A 4-carbon compound
    • C. A 6-carbon compound
    • D. A 3-carbon compound

  4. 4. How many NADH are formed in the Krebs cycle for each glucose molecule?

    • A. 3
    • B. 4
    • C. 6
    • D. 8

  5. 5. The enzyme that removes CO₂ from pyruvate is inhibited. Which stage is directly stopped?

    • A. Glycolysis
    • B. The link reaction
    • C. Oxidative phosphorylation
    • D. The formation of pyruvate

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