Question

which is not a factor favoring photorespiration in place of photosynthesis

Answer 1

hotorespiration(also known as theoxidative photosynthetic carbon cycle, orC2photosynthesis) refers to a process inplant metabolismwhere theenzymeRuBisCOoxygenatesRuBP, wasting some of the energy produced by photosynthesis. The desired reaction is the addition ofcarbon dioxideto RuBP(carboxylation), a key step in theCalvin–Benson cycle, however approximately 25% of reactions by RuBisCO instead add oxygen to RuBP (oxygenation), creating a product that cannot be used within the Calvin–Benson cycle. This process reduces the efficiency of photosynthesis, potentially reducing photosynthetic output by 25% inC3plants.[1]Photorespiration involves a complex network of enzyme reactions that exchange metabolites betweenchloroplasts, leafperoxisomesandmitochondria.