NEET Botany Calvin Cycle MCQ Question
Which of the following statements about the Calvin Cycle is correct?
The Calvin Cycle requires 18 ATP and 12 NADPH to synthesize one glucose molecule.
The first product of CO2 fixation in the Calvin Cycle is ribulose bisphosphate.
The regeneration of RuBP requires one molecule of ATP for phosphorylation.
C4 plants conduct the Calvin Cycle in mesophyll cells exclusively.
Correct Answer
Detailed Explanation
To synthesize one molecule of glucose, the Calvin Cycle requires 18 ATP and 12 NADPH as stated in the NCERT context. The first product of CO2 fixation is not RuBP, but 3-phosphoglycerate (PGA), and RuBP regeneration indeed requires ATP. Additionally, C4 plants conduct the Calvin Cycle in bundle sheath cells, not just mesophyll cells.
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