For the synthesis of sugar by reducing CO₂, NADPH₂ provides:
Correct answer: D. Both B and C
- A. Enzymes
- B. Co-enzymes
- C. Energized electrons
- D. Both B and C
Explanation
NADPH is vital in the Calvin cycle, where it acts both as a coenzyme and a provider of energized electrons. These electrons are used to reduce carbon dioxide into glucose. Option D, 'Both B and C,' captures the dual function of NADPH, making it the correct answer. Option A is incorrect because enzymes are not supplied by NADPH. Option B mentions the coenzyme role but misses the primary function of donating electrons. Option C correctly identifies the provision of energized electrons but does not acknowledge the coenzyme aspect, which is why Option D is the most comprehensive choice.
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Cellular respiration explains how cells release energy from glucose through glycolysis, the link reaction, Krebs cycle and electron transport chain. It includes ATP production, substrate-level and oxidative phosphorylation, aerobic versus anaerobic respiration, and the roles of mitochondria, oxygen and fermentation in energy transfer.
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