First slide

Where are the ATP and NADPH Used?

Question

The net requirement of assimilatory powers for the formation of 1 hexose molecules in $C_{3}$ plant is:

Easy

A

72 ATP and 48 NADPH+H⁺
B

90 ATP and 60 NADPH+H⁺
C

108 ATP and 72 NADPH+H⁺
D

18 ATP and 12 NADPH+H⁺

Solution

Six turns of Calvin cycle are required to produce one molecule of glucose. Twelve ATP and twelve NADPH+H⁺ molecules are required during reduction phase where twelve 3-PGA molecules are reduced to twelve PGAL molecules and 6 ATPs are required during regeneration phase where six RuBP molecules are regenerated from ten molecules of PGAL.

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