Question

In sugarcane plant ${}^{14}C{O}_2$ is fixed in malic acid. in which the enzyme that fixes $C{O}_2$ is:

• A. Ribulose biphosphate carboxylase
• B. Phosphoenol pyruvic acid carboxylase
• C. Ribulose phosphate kinase
• D. Fructose phosphatase

Answer 1

The correct option is B Phosphoenol pyruvic acid carboxylase

In C4 plants like sugarcane, $C{O}_2$ is fixed on to phosphoenol pyruvic acid to form oxaloacetic acid. This reaction is catalyzed by the enzyme phosphoenol pyruvic acid carboxylase. The oxaloacetic acid is reduced to malic acid.