NEET Botany Calvin Cycle MCQ Question
Which of the following statements about the Calvin Cycle are correct?
Each turn of the cycle requires 2 molecules of NADPH and 2 molecules of ATP per CO2 fixed.
The cycle regenerates RuBP using 1 ATP molecule for each turn.
A total of 6 ATP and 4 NADPH molecules are required to produce one glucose molecule.
The Calvin Cycle occurs in the mesophyll cells of both C3 and C4 plants.
Correct Answer
Detailed Explanation
For each CO2 molecule fixed in the Calvin Cycle, 2 molecules of NADPH and 2 molecules of ATP are indeed required. The regeneration of RuBP uses 1 ATP per turn, but to produce one glucose molecule, a total of 18 ATP and 12 NADPH are needed. The Calvin Cycle occurs in mesophyll cells of C3 plants, not in C4 plants.
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