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Cellular Respiration

AP Biology· difficulty 3/5

Krebs Cycle OAA Citrate α-KG Succinate Acetyl-CoA CO2 CO2 NADH x3 FADH2, GTP

Per acetyl-CoA entering the Krebs cycle, how many NADH, FADH2, and ATP/GTP are produced?

  • A

    3 NADH, 1 FADH2, 1 ATP/GTP

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  • B

    2 NADH, 2 FADH2, 0 ATP

  • C

    1 NADH, 3 FADH2, 2 ATP

  • D

    0 NADH, 1 FADH2, 4 ATP

Explanation

Each acetyl-CoA generates 3 NADH, 1 FADH2, 1 ATP (or GTP), and 2 CO2 in one turn of the Krebs cycle.

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