The first enzyme in C₄ carbon fixation is

Question

Quizplus · Accepted Answer

The correct answer is phosphoenolpyruvate (PEP) carboxylase. This is the first enzyme in the C4 carbon fixation pathway, which takes place in mesophyll cells. Rubisco is the enzyme responsible for the carbon fixation step in the Calvin cycle, which takes place in chloroplasts of C3 plants. PEP and pyruvate carboxylase are involved in other metabolic pathways, but not in the initial step of C4 carbon fixation. The enzyme for C4 carbon fixation is located in mesophyll cells, not bundle sheath cells.

The First Enzyme in C4 Carbon Fixation Is

The First Enzyme in C₄ Carbon Fixation Is