NEET 2006 Biology question

The majority of carbon dioxide produced by our body cells is transported to the lungs-

(1)Dissolved in the blood
(2)As bicarbonatesCorrect
(3)As carbonates
(4)Attached to hemoglobin

Answer: (2)

Solution

Carbon dioxide is carried in the blood in three ways: about 70% as bicarbonate ions (formed in RBCs by carbonic anhydrase from CO2 + H2O to H2CO3 to H+ + HCO3-), about 20-25% as

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Question ID VK-089726