Choose the right sequential phenomena during the passage of…

Biology Breathing and Exchange of Gases Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 20, 2026

Choose the right sequential phenomena during the passage of CO 2 from blood to tissues:

(P) Absorption of CO 2 by blood.

(Q) Reaction of CO 2 with water forming H 2 CO 3 inside RBCs and then HCO 3 - and H+ ions.

(R) Reaction of CO 2 with water forming H 2 CO 3 inside plasma followed by conversion into H+ and HCO 3 - ions.

(S) Combination of H+ with haeme part of HbO 2 to release O 2 .

(T) Combination of HCO 3 with haeme part of HbO 2 to form reduced haemoglobin and release of O 2 .

P, R, S

P, Q, T

P, Q, S

P, R, T

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