Photorespiration A) takes place only in C₄ plants. B) includes reactions carried out in peroxisomes. C) increases the yield of photosynthesis. D) is catalyzed by PEP carboxylase. E) is independent of light intensity.

Question

Quizplus · Accepted Answer

Photorespiration occurs in all plants, but it is more prominent in C3 plants. It is a process that occurs when the concentration of CO2 is low and O2 is high, resulting in the oxygenation of RuBP by Rubisco instead of carboxylation. This leads to the production of a toxic compound, which is then broken down in peroxisomes through photorespiration. Photorespiration results in the loss of up to 50% of the CO2 fixed in photosynthesis and reduces the yield of photosynthesis. Therefore, option B is the correct answer.