Question

During photorespiration oxygen consuming reaction(s) occur in

• A. Stroma of chloroplasts $\&$ peroxisomes
• B. Stroma of Chloroplasts
• C. Grana of chloroplast and peroxisomes
• D. Stroma of chloroplasts and mitochondria

Answer 1

Answer: (A)

Stroma of chloroplasts $\&$ peroxisomes

The original oxygenation reaction by RUBISCO occurs in the chloroplast. In the peroxisome, glycolate from the chloroplast is converted to glyoxylate. This reaction consumes O2 and generates hydrogen peroxide. The O2 is released again, however, as the hydrogen peroxide is converted to water by the enzyme catalase.

So, the correct option is Stroma of chloroplasts & peroxisomes.