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  4. In the Calvin cycle for the fixation of 5 molecules of CO2, how many ATP and NADPH are required in the reduction step?

Q. In the Calvin cycle for the fixation of 5 molecules of CO2, how many ATP and NADPH are required in the reduction step?

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Solution:

During the Calvin cycle, for fixing one molecule of CO2, 2 ATP and 2 NADPH are required in the reduction step. Hence, for the fixation of 5 molecules of CO2, 10 ATP, and 10 NADPH are required in the reduction step.