During the dark reaction of photosynthesis, how many molecules of ATP and NADPH are utilized in the Calvin cycle for the fixation of 3 molecules of CO₂ ?

Step-by-step solution

In the Calvin cycle, the fixation of one molecule of CO₂ requires 3 molecules of ATP and 2 molecules of NADPH. For the fixation of 3 molecules of CO₂ , the total requirement is calculated as follows: Number of ATP molecules = 3 3 = 9 ATP Number of NADPH molecules = 3 2 = 6 NADPH Thus, 9 ATP and 6 NADPH molecules are utilized. Answer: 9 ATP and 6 NADPH