Question

How many molecules of ATP and NADPH are required in formation of two molecules of glucose? How many Calvin cycles are required?

• A. 24 ATP, 36 NADPH, 12 Calvin cycles
• B. 18 ATP, 12 NADPH, 6 Calvin cycles
• C. 36 ATP, 24 NADPH, 6 Calvin cycles
• D. 36 ATP, 24 NADPH, 12 Calvin cycles

Answer 1

Answer: (D)

36 ATP, 24 NADPH, 12 Calvin cycles

For the synthesis of one glucose molecule, 6 Calvin cycles are necessary and a total of 18 ATP, 12 NADPH are consumed in 6 Calvin cycles. So, for the synthesis of 2 glucose molecules 36 ATP, 24 NADPH and 12 turns of Calvin cycle are needed.