Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The synthesis of one molecule of glucose during the dark reaction of a C₃ plant requires 30 ATP and 12 NADPH. Reason (R): The regeneration of the CO₂ acceptor RuBP requires 1 ATP per turn of the Calvin cycle, while the reduction phase requires 2 ATP and 2 NADPH. In the light of the above statements

Step-by-step solution

Assertion (A) is incorrect because the synthesis of one molecule of glucose in a C₃ plant requires 6 turns of the Calvin cycle, consuming a total of 18 ATP and 12 NADPH. The requirement of 30 ATP and 12 NADPH is characteristic of C₄ plants. Reason (R) is correct as per the steps of the Calvin cycle: for every CO₂ molecule entering the cycle, the reduction phase utilizes 2 ATP (for phosphorylation) and 2 NADPH (for reduction), and the regeneration of the primary acceptor RuBP requires 1 ATP. Answer: Assertion is inc