In sugarcane plant ${ }^{14} \mathrm{CO}_2$ is fixed in malic acid, in which the enzyme that fixes…

In sugarcane plant ${ }^{14} \mathrm{CO}_2$ is fixed in malic acid, in which the enzyme that fixes $\mathrm{CO}_2$ is:
  1. ribulose biphosphate carboxylase
  2. phosphoenol pyruvic acid carboxylase
  3. ribulose phosphate kinase
  4. fructose phosphatase

Solution

In $\mathrm{C}_4$ plant, in chloroplasts of mesophyll cells PEP carboxylase is the key enzyme used in carbon fixation. Due to this enzyme PEP $+\mathrm{CO}_2$ converted into oxaloacetic acid. Caution Sugarcane is a $C_2$ plant.

Asked in: NEET 2003

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