During the light-independent reactions of photosynthesis, carbon dioxide fixation is catalyzed by which key enzyme located in the stroma of chloroplasts?

💡 Solution & Explanation

Ribulose-1,5-bisphosphate carboxylase-oxygenase, commonly known as RuBisCO, is the primary enzyme catalyzing the fixation of carbon dioxide into organic molecules during the Calvin cycle in plant chloroplasts. Hexokinase phosphorylates glucose during glycolysis, ATP synthase generates ATP using proton gradients, and pyruvate dehydrogenase links glycolysis to the Krebs cycle. RuBisCO is widely considered the most abundant protein on Earth due to its presence in all photosynthetic plants.