Calvin's Cycle & Renewable Energy Applications — NEET Biology

Correct answer: C — A-ii, B-i, C-iv, D-iii

Let's match each factor from Column I with its primary impact from Column II: A. Light: Light is the energy input for photochemical reactions, driving the light-dependent stage of photosynthesis. So, A matches with ii (Acts as the direct energy source for photochemical reactions and electron transport). B. Temperature: The dark reactions of photosynthesis are enzymatic and thus highly sensitive and controlled by temperature. So, B matches with i (Primarily affects the rate of dark reactions due to enzymatic control). C. CO₂ concentration: CO₂ is the essential carbon substrate that combines with RuBP in the Calvin cycle (carboxylation). So, C matches with iv (Serves as the crucial carbon substrate for the carboxylation step of the Calvin cycle). D. Water stress: Water stress causes stomata to close, which reduces the intake of CO₂, making CO₂ availability a limiting factor. It also affects leaf turgidity and metabolic activity. So, D matches with iii (Leads to stomatal closure, indirectly reducing the availability of a key reactant). Therefore, the correct combination is A-ii, B-i, C-iv, D-iii, which corresponds to option D This question assesses the understanding of how different external factors specifically influence various stages or aspects of the photosynthetic process.