Question

Photorespiration occurs in

• A. Ribosomes
• B. Mitochondria
• C. Peroxisome
• D. Both B and C

Answer 1

The correct option is D

Both B and C

The correct option is D

Explanation of the correct option:

1. Photorespiration occurs in both peroxisomes and mitochondria.
2. Photorespiration is a process in which the enzyme RuBisCo oxygenates RuBP and wastes some energy.
3. It is often termed ${\mathrm{C}}_2$ photosynthesis or oxidative photosynthetic carbon cycle.
4. It occurs in both mitochondria and peroxisomes.
5. It involves a network of reactions between chloroplast, leaf peroxisomes, and mitochondria.

Explanation of the incorrect option:

Option A:

1. Photorespiration does not occur in ribosomes.
2. They are not involved in this process because it is not a part of ${\mathrm{C}}_2$ photosynthesis cycle.

Final answer: Photorespiration occurs in mitochondria and peroxisomes.