First slide

Where are the ATP and NADPH Used?

Question

How many turns of Calvin cycle and how many ATP molecules will be required for synthesis of one molecule of sucrose?

Moderate

A

6 Calvin cycle and 18 ATP
B

12 Calvin cycle and 36 ATP
C

2 Calvin cycle and 3 ATP
D

12 Calvin cycle and 18 ATP

Solution

For the synthesis of 1 molecule of glucose the has to be 6 rounds of Calvin cycle and utilization of 18 ATP. Therefore, for synthesis of one molecule of sucrose (glucose+fructose) the calvin cycle has to occur (6x2= 12 times) and the number of ATP utilised would be (18 x 2= 36 ATP).

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