What is the total energy requirement (ATP and NADPH) for the synthesis of one molecule of glucose in the C3 pathway?
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Correct answer: 18 ATP and 12 NADPH
For each CO2 fixed, 3 ATP and 2 NADPH are consumed (2 ATP/2 NADPH in reduction, 1 ATP in regeneration). Multiplying this by 6 turns for one glucose molecule yields 18 ATP and 12 NADPH.
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