Breathing and Exchange of Gases Question 14
14. Carbonic anhydrase occurs in
[1991]
(a) Lymphocytes
(b) Blood plasma
(c) $RBC$
(d) Leucocytes
Show Answer
Answer : c
Hints & Solution
(c) Carbonic anhydrase is a zinc-containing enzyme present in RBCs. In presence of this enzyme, carbon dioxide reacts with water to form carbonic acid. Carbonic anhydrase is abundantly distributed in renal tissue and functions, as in other epithelia, to catalyze the hydration-dehydration reaction of $CO 2$. The proximal tubule is responsible for at least $80 %$ of whole kidney bicarbonate transport and is mediated by proton secretion.
