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NEET2006BotanyPhotosynthesis in Higher PlantsActual

During photorespiration, the oxygen consuming reaction (s) occur in:

Options

  1. Astroma of chloroplasts
  2. Bstroma of chloroplasts and mitochondria
  3. Cstroma of chloroplasts and peroxisomes
  4. Dgrana of chloroplasts and peroxisomes

Correct answer

C. stroma of chloroplasts and peroxisomes

Step-by-step solution

The first reaction of photorespiration occurs in the stroma of chloroplasts. In this reaction, RuBisCO in the presence of oxygen shows oxygenase activity. In peroxisomes, the glycolate transferred from chloroplasts takes up O ₂ and forms the glyoxylate, whereas H ₂ O ₂ is released as a byproduct.

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