Question

Primary carboxylating enzyme in $C_4$ plant is found in __________________.

• A. Chloroplast of mesophyll cells
• B. Cytoplasm of mesophyll cell
• C. chloroplast of bundle sheath cells
• D. Cytoplasm of bundle sheath cells

Answer 1

The correct option is A Chloroplast of mesophyll cells

Primary carboxylating enzyme in $C_4$ plant is found in Chloroplast of mesophyll cell. In $C_4$ plants, initial fixation of carbon dioxide occurs in mesophyll cells. PEP is the primary acceptor of carbon dioxide which combines with carbon dioxide in the presence of PEPcase to form oxaloacetate.