Question

Peroxisomes, in plant cells, are involved in

• A. Photooxidation
• B. Photorespiration
• C. Photophosphorylation
• D. Photolysis of water

Answer 1

The correct option is B Photorespiration

Peroxisomes are microbodies which have enzymes for peroxide metabolism. They include :

(a) Peroxide producing oxidative enzymes like peroxidase, urate oxidase or uricase, amino acid oxidase and (b) Peroxide destroying enzymes like catalase.

Peroxisomes occur widely in animals cells, protists, fungi, higher plants but quite common in photosynthetic cells. In mesophyll cells, peroxisomes interact with chloroplasts, and mitochondria to take part in photorespiration.