Photosynthesis

AP Biology· difficulty 3/5

To produce one G3P (3-carbon sugar) via the Calvin cycle, the plant uses approximately

  • A

    9 ATP and 6 NADPH

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  • B

    30 ATP

  • C

    0 — Calvin cycle uses no ATP

  • D

    1 ATP and 1 NADPH

Explanation

Three turns of the cycle per G3P. Three CO₂ × (3 ATP + 2 NADPH) = 9 ATP + 6 NADPH per G3P.

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