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Q. The oxygen liberated during photosynthesis comes from

  • (A) Carbon dioxide
  • (B) Chlorophyll
  • (C) Water
  • (D) Glucose
  • Correct Answer - Option(C)
  • Views: 18
  • Filed under category Biology
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Explanation by: Admin

During photosynthesis, plants use sunlight to convert water (H₂O) and carbon dioxide (CO₂) into glucose (C₆H₁₂O₆) and oxygen (O₂).

The oxygen (O₂) released as a byproduct comes from water molecules, not from carbon dioxide. This process occurs in the light-dependent reactions of photosynthesis, specifically during photolysis, where water molecules are split by sunlight.

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