NEET 2010 Biology question

What is true about RBCs in humans

(1)They transport 99.5 per cent of O
(2)They transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in dissolved state in blood plasma
(3)They do not carry CO at all
(4)They carry about 20-25 per cent of COCorrect

Answer: (4)

Solution

About 97 per cent of the oxygen is transported by RBCs (as oxyhaemoglobin) and only about 3 per cent is dissolved in plasma, so (1) (99.5 per cent) and (2) (80 per cent) are wrong. About 20-25 per cent of

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Question ID VK-090641