What is reduced during sugar production in photosynthesis?
Correct answer: D. Carbon dioxide
- A. NADH
- B. DNA
- C. Oxygen
- D. Carbon dioxide
Explanation
Option D is correct because, in the Calvin cycle of photosynthesis, carbon dioxide is reduced to produce carbohydrates (sugars). This reduction is crucial for forming glucose and other sugars. The other options are incorrect as NADH is primarily involved in cellular respiration, DNA is not directly involved in this part of photosynthesis, and oxygen is a product of the light-dependent reactions, not involved in the reduction process of sugar production.
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