Question

In C4 pathway, the CO2 fixation in mesophyll cells is carried out by the enzyme .........

• A. PEP carboxylase
• B. Rubisco
• C. Pyruvate dehydrogenase
• D. Pyruvate decarboxylase

Answer 1

Answer: (A)

PEP carboxylase

Answer 2

In $C_{4}$ pathway, the primary $CO_{2}$ acceptor is a $3$-carbon molecule phosphoenol pyruvate $(PEP)$ and is present in the mesophyll cells. The enzyme responsible for this fixation is $PEP$ carboxylase or $PEP$ case