Question

Where do the below reaction takes place
and what is the enzyme required
H2CO3 + HCO3 + H+
(A) At tissues, carboxypeptidase
(B) At alveoli, carboxypeptidase
(C) At tissues, carbonic anhydrase
(D) At alveoli, carbonic anhydrase​

Answer 1

Answer:

(C) In tissues, carbonic anhydrase​

Explanation:

The carbonic anhydrase is a metalloenzyme, also known by the name carbonate dehydratases. This enzyme is involved in the interconversion reactions between CO₂, H₂O, carbonic acid, and bicarbonate. This enzyme converts carbon dioxide and water into carbonic acid (H₂CO₃), which is further hydrolyzed to H⁺ ions and HCO₃⁻ (bicarbonate) in our tissues. However, the reversible occurs at the alveoli surface of the lungs.

1). At the alveoli surface of the lungs, the reaction is -

H⁺ + HCO₃⁻ → H₂CO₃ → CO₂ + H₂O

2). In the tissues, the reaction is -

CO₂ + H₂O → H₂CO₃ → H⁺ + HCO₃⁻

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