What molecule is reduced by NADP+ reductase during photosynthesis?

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Multiple Choice

What molecule is reduced by NADP+ reductase during photosynthesis?

Explanation:
In the light reactions of photosynthesis, NADP+ reductase hands electrons from photosystem I to NADP+, converting the oxidized carrier NADP+ into the reduced form NADPH. This NADPH is the high-energy electron donor that fuels the Calvin cycle’s carbon fixation steps, helping convert CO2 into sugars. ATP, not NADP+ reductase, provides the chemical energy, and NADH is associated with respiration, not the chloroplast light reactions. So the molecule being reduced by NADP+ reductase is NADP+, forming NADPH that later powers biosynthetic processes.

In the light reactions of photosynthesis, NADP+ reductase hands electrons from photosystem I to NADP+, converting the oxidized carrier NADP+ into the reduced form NADPH. This NADPH is the high-energy electron donor that fuels the Calvin cycle’s carbon fixation steps, helping convert CO2 into sugars. ATP, not NADP+ reductase, provides the chemical energy, and NADH is associated with respiration, not the chloroplast light reactions. So the molecule being reduced by NADP+ reductase is NADP+, forming NADPH that later powers biosynthetic processes.

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