Class 11 · Breathing and Exchange of Gases

Carbonic Anhydrase Role in CO₂ Transport — NEET Biology

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📖 NCERT Source

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.

🖼️Related NCERT figure: Chemical reaction diagram showing CO₂ + H₂O converting to H₂CO₃ then to HCO₃⁻ + H⁺, with carbonic anhydrase enzyme catalyzing both forward and reverse reactions
NCERT Biology · Class 11 · Chapter 14 · Paragraph 32
Why This May Be Tested in NEET 2027

Adjacent to a frequently-asked paragraph in the same chapter.

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QuestionPredicted for NEET 2027

Assertion (A): 70% of CO₂ is carried as bicarbonate in plasma. Reason (R): Carbonic anhydrase is only present in plasma.

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