How many molecules of ATP and NADPH are required for every molecule of CO₂ fixed in the Calvin cycle?

Options

1. 2 ATP and 2 NADPH
2. 3 ATP and 3 NADPH
3. 3 ATP and 2 NADPH
4. 2 ATP and 3 NADPH

Correct Answer

3 ATP and 2 NADPH

Explanation

In the Calvin cycle, fixation of one CO₂ requires 3 ATP and 2 NADPH molecules to regenerate RuBP and produce carbohydrates.

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