What enzyme is the first enzyme in the C₄ pathway that carries CO₂ into the bundle sheath cells? A)Rubisco B)phosphenolpyruvate carboxylase C)pyruvate carboxylase D)phosphoenolpyruvate decarboxylase E)ATP synthase

Question

Quizplus · Accepted Answer

Phosphoenolpyruvate carboxylase is the first enzyme in the C4 photosynthesis pathway that catalyzes the carboxylation of phosphoenolpyruvate (PEP) to form oxaloacetate (OAA). OAA is then reduced to malate, which is transported into bundle sheath cells where it is decarboxylated to release CO2, which enters the Calvin cycle. Therefore, option B is the correct answer.

What Enzyme Is the First Enzyme in the C4 Pathway

What Enzyme Is the First Enzyme in the C₄ Pathway