Question

For synthesis of a molecule of glucose, the requirement of ATP and NADPH is respectively

• A. 15 and 10
• B. 33 and 22
• C. 12 and 8
• D. 18 and 12.

Answer 1

Answer: (D)

18 and 12.

For every CO${}_2$ molecule entering the Calvin cycle, 3 molecules of ATP and 2 NADPH are required. To make one molecule of glucose six CO${}_2$ molecules required and the cycle turns six times.

So the number of total ATP=3X6=18.

The number of total NADPH=3X4=12.

So the correct option is '18 and 12'.