AP BIOLOGY

Detailed explanation-1: -Hint: During cellular respiration, NAD+ gets reduced to form this molecule. A compound in which H is added or when electrons are added to it then it is said to undergo a reduction reaction. Complete answer: NADH is not a product of light reaction of photosynthesis.

Detailed explanation-2: -In this reaction, the energy from ATP and NADPH are used to fix carbon dioxide (CO2). So NADH is not a product of the light reaction of photosynthesis.

Detailed explanation-3: -Light-dependent reactions, which occur in the thylakoid membranes of a chloroplast, is the first stage of photosynthesis. In this stage, ATP and NADPH are produced and these compounds are used by the Calvin cycle for producing glucose. Therefore, sugar is not produced by light-dependent reactions.

Detailed explanation-4: -Glucose is synthesised by utilising the assimilatory powers produced during light reaction. The synthesis of glucose occurs in stroma and this does not require light. Hence, the reaction for synthesis of glucose is a light-independent reaction.

Detailed explanation-5: -The ATP and NADPH from the light-dependent reactions are used to make sugars in the next stage of photosynthesis, the Calvin cycle.