RBCs contain a very high concentration of the enzyme, carbonic anhydrase and minute quantities of the same is present in the plasma too. This enzyme facilitates the following reaction in both directions.
Adjacent to a frequently-asked paragraph in the same chapter.
Assertion (A): 70% of CO₂ is carried as bicarbonate in plasma. Reason (R): Carbonic anhydrase is only present in plasma.
Correct answer: C — A is true but R is false
Carbonic anhydrase is mainly present in RBCs, not plasma.
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