Question:
In sugarcane plant \(^{14}CO_2\) is fixed in malic acid, in which the enzyme that fixes \(CO_2\) is:
In sugarcane plant \(^{14}CO_2\) is fixed in malic acid, in which the enzyme that fixes \(CO_2\) is:
Updated On: Apr 28, 2026
- Ribulose biphosphate carboxylase
- Phosphoenol pyruvic acid carboxylase
- Ribulose phosphate kinase
- Fructose phosphatase
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The Correct Option is B
Solution and Explanation
In the sugarcane plant, Phosphoenol pyruvic acid carboxylase (PEP carboxylase) is the enzyme responsible for fixing \(CO_2\) to form malic acid during a process called Crassulacean Acid Metabolism (CAM). This enzyme is crucial for \(CO_2\) fixation in plants that use the CAM photosynthesis pathway, which includes many succulent plants like sugarcane.
So, the correct option is (B): Phosphoenol pyruvic acid carboxylase
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Concepts Used:
Aerobic respiration
It is the release of a relatively large amount of energy in cells by the breakdown of food substances in the presence of oxygen:
Glucose + Oxygen → Carbon Dioxide + Water.