Assertion: Photorespiration is a wasteful process where there is no synthesis of ATP energy. Reason : RuBisCO is present in mesophyll cells of C ₄ plants hence they show more productivity.

Step-by-step solution

Photorespiration does not produce energy or reducing power. Rather it consumes energy. In C ₄ plants, photorespiration, does not occur. Here, RuBisCO is located only in bundle sheath cells where photosynthetic release of oxygen does not occur. Bundle sheath cells have a high intracellular concentration of CO ₂ due to flow of C ₄ acids and their decarboxylation to release CO ₂ . Therefore, RuBisCO functions purely as carboxylase in C ₄ plants. They show high productivity and hence higher yield.