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Cellular Respiration

For fixing on...

Question

For fixing one molecule of $C O_{2}$ in Calvin cycle, how many $A T P$ and $N A D P H$ are required?

2 A T P + 3 N A D P H

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3 A T P + 2 N A D P H

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3 A T P + 3 N A D P H

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3 A T P + 1 N A D P H

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Solution

The correct option is B $3 A T P + 2 N A D P H$
In Calvin cycle, $3 A T P$ and $2 N A D P H$ are required to fix a single molecule of $C O_{2}$ . Glucose is a $6$ carbon molecule, hence, $6$ molecules of carbon dioxide are used for its production. Energy expenditure to fix one molecule of $C O_{2} = 3 A T P + 2 N A D P H$

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