Question

The enzyme that is not found is $C_3$ plants is

• A. ATP synthase
• B. RUBP carboxylase
• C. NADP reductase
• D. PEP carboxylase

Answer 1

Answer: (D)

PhosphoEnolPyruvate (PEP) carboxylase is present in the mesophyll cells of the $C_4$ plants and catalyse the conversion PEP to OxaloAecetate. (OAA), the first $4C$ stable compound formed in $C_4$ plants formed by the acceptance of atmospheric $C{O}_2$ by PEP in presence of PEP carboxylase. So, the correct answer is 'PEP Carboxylase'