Question

For the synthesis of one molecule of glucose, the Calvin cycle repeats how many times?

• A. 3
• B. 4
• C. 5
• D. 6

Answer 1

The correct option is D 6

For the synthesis of one molecule of glucose, the Calvin cycle repeats six times. The Calvin cycle is a light-independent reaction in photosynthesis and takes place in three steps, viz., carbon fixation, reduction and regeneration. For the fixation of six molecules of $C{O}_2$, six turns of the cycle are required. Six turns of the Calvin cycle results in the synthesis of one molecule of glucose.