The assimilatory power generated during the light reaction is retained within the chloroplast to drive the biosynthetic phase. Which of the following strictly requires the utilization of both ATP and NADPH produced during the light reaction?

Step-by-step solution

The products of the light reaction retained in the chloroplast are ATP and NADPH. In the Calvin cycle, the carboxylation step is the fixation of CO₂ into a stable organic intermediate and does not require any assimilatory power. The reduction step involves the utilization of 2 molecules of ATP for phosphorylation and 2 molecules of NADPH for reduction per CO₂ molecule fixed. The regeneration of RuBP requires only 1 molecule of ATP for phosphorylation to form RuBP, and does not require NADPH. Synthesis of sucrose oc