Question

Synthesis of one glucose molecule requires reduced NADP molecules

• A. 6
• B. 12
• C. 18
• D. 24

Answer 1

The correct option is B 12

Synthesis of one glucose molecules requires 12 NADP molecules to reduce because the Calvin cycle a pathway of reduction of CO${}_2$for the continuous and uninterrupted functioning requires a regular supply of ATP, NADH and also sufficient amount of RuBP. The regeneration step requires one ATP molecule for phosphorylation. Hence for every CO${}_2$ molecule that enters the into Calvin cycle, 2 molecules of NADH and also 3 molecules of ATP are required. Thus in order to produce one molecule of glucose through the Calvin pathway 12NADPH and 18 ATP is required ( for one glucose, 6 CO${}_2$ is required).

So the correct option is B