Q.

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

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a

12 Calvin cycle and 18 ATP

b

6 Calvin cycle and 18 ATP

c

2 Calvin cycle and 3 ATP

d

12 Calvin cycle and 36 ATP

answer is B.

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Detailed 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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