PHOTOSYNTHESIS
LIGHT DEPENDENT REACTIONS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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What is the primary function of the light reactions of photosynthesis?
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To produce glucose
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To produce NADPH and ATP
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To use ATP
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To produce RuBP
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Explanation:
Detailed explanation-1: -The primary function of the light-dependent reactions is to convert light energy into chemical energy. This chemical energy (ATP and NADPH) will be used by the Calvin cycle (light independent reaction) to fuel the assembly of sugar molecules.
Detailed explanation-2: -The ATP and NADPH from the light-dependent reactions are used to make sugars in the next stage of photosynthesis, the Calvin cycle. In another form of the light reactions, called cyclic photophosphorylation, electrons follow a different, circular path and only ATP (no NADPH) is produced.
Detailed explanation-3: -ATP and NADPH are produced on the stroma side of the thylakoid membrane, where they can be used by the Calvin cycle.
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