AP BIOLOGY

Detailed explanation-1: -The most prominent role of peroxisomes in photosynthetic plant tissues is their participation in photorespiration, a process also known as the oxidative C2 cycle or the oxidative photosynthetic carbon cycle.

Detailed explanation-2: -Photorespiration occurs in both peroxisomes and mitochondria. Photorespiration is a process in which the enzyme RuBisCo oxygenates RuBP and wastes some energy. It is often termed photosynthesis or oxidative photosynthetic carbon cycle. It occurs in both mitochondria and peroxisomes.

Detailed explanation-3: -Photorespiration, or C2 photosynthesis, is generally considered a futile cycle that potentially decreases photosynthetic carbon fixation by more than 25%. Nonetheless, many essential processes, such as nitrogen assimilation, C1 metabolism, and sulfur assimilation, depend on photorespiration.

Detailed explanation-4: -Second, peroxisomes in leaves are involved in photorespiration, which serves to metabolize a side product formed during photosynthesis (Figure 10.28). CO2 is converted to carbohydrates during photosynthesis via a series of reactions called the Calvin cycle (see Figure 2.39).