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Which of the following are required for the dark reaction of photosynthesis? 1. Light 2. Chlorophyll 3. Carbon dioxide 4…

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Which of the following are required for the dark reaction of photosynthesis?1. Light2. Chlorophyll3. Carbon dioxide4. ATP5. NADPH Choose the correct answer from the options given below: [NEET 2024]
a4 and 5 only
b1, 2 and 3 only
c2, 3 and 4 only
d3, 4 and 5 only
✓ Correct answer: d) 3, 4 and 5 only
ExplanationThe dark reaction (also called the Calvin cycle or light-independent reaction) does not require light directly.It uses the products of the light reaction to fix carbon dioxide into carbohydrates.Requirements of the dark reaction:3. Carbon dioxide (CO₂): Source of carbon for glucose formation.4. ATP: Provides energy for carbon fixation steps.5. NADPH: Provides reducing power (hydrogen and electrons) to reduce 3- phosphoglyceric acid to glyceraldehyde- 3-phosphate.

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