The requirement of assimilatory power to fix 6 molecules of CO₂ is

Options

(a) 6 ATP, 6 NADPH
(b) 12 ATP, 18 NADPH
(c) 18 ATP, 18 NADPH
(d) 18 ATP, 12 NADPH

Correct Answer:

18 ATP, 12 NADPH

Explanation:

The net reaction of Calvin cycle or C₃ cycle is
6RuBp + 6CO₂ + 18ATP +12NADPH → 6RuBP + C₆H₁₂O₆ + 18ADP + 12NADP⁺ + 18Pi
This indicates that 12NADPH and 18ATP are required for the production of one molecule of glucose during Calvin cycle.