Question

Identify the enzyme that catalyses the reaction of CO\(_2\) with water in the human body.

• A. Ferroxidase
• B. Catalase
• C. Nitrogenase
• D. Carbonic anhydrase

Hint:

Carbonic anhydrase is essential for regulating CO\(_2\) levels and pH in the body, particularly in the lungs and kidneys.

Answer 1

The Correct Option is D

Step 1: Understanding the reaction.
Carbonic anhydrase is the enzyme responsible for catalyzing the reversible hydration of carbon dioxide to form carbonic acid (H\(_2\)CO\(_3\)) in the human body. This reaction is important in processes like respiration and maintaining pH balance.

Step 2: Analyzing the options.
(A) Ferroxidase: This enzyme catalyzes the oxidation of iron, not the reaction of CO\(_2\) with water.
(B) Catalase: Catalase catalyzes the breakdown of hydrogen peroxide, not CO\(_2\).
(C) Nitrogenase: Nitrogenase is involved in nitrogen fixation, not the hydration of CO\(_2\).
(D) Carbonic anhydrase: This is the correct enzyme, as it catalyzes the reaction between CO\(_2\) and water.

Step 3: Conclusion.
The correct answer is (D) Carbonic anhydrase.