Q. Which gas is essential for cellular respiration?

  • (A) Carbon dioxide
  • (B) Oxygen
  • (C) Nitrogen
  • (D) Hydrogen
✅ Correct Answer: (B) Oxygen
Explanation: Oxygen is required for the breakdown of glucose in cells to produce energy in the form of ATP.

Published by Neha Sharma ⭐ 7.80K Points at 08-Apr-2026 01:42 pm in Biology

Explanation by: Neha Sharma
Oxygen is required for the breakdown of glucose in cells to produce energy in the form of ATP.

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