One turn of the Calvin cycle fixes a molecule of CO2 gas and is driven by 3 molecules of ATP and 2 molecules of NADPH from the light reactions. Which of the following is true?

A. It takes 3 turns of the cycle, 9 molecules of ATP, and 6 molecules of NADPH to make one molecule of glucose.
B. It takes 6 turns of the cycle, 18 molecules of ATP, and 12 molecules of NADPH to make a glucose molecule.
C. The cycle must be carried out in the dark.
D. The cycle is exergonic.


Answer: B

Biology & Microbiology

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