Photosynthesis vs Respiration · NCERT Biology

Which gas is released during photosynthesis but consumed during respiration?

  1. Carbon dioxide
  2. Nitrogen
  3. Oxygen (O₂)
  4. Hydrogen
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Correct answer: Oxygen (O₂)

Oxygen is released as a by-product of the light reactions of photosynthesis. It is consumed during aerobic respiration as the final electron acceptor.

Difficulty: Medium Question 2 of 20

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