NEET Biology question

The toxic effect of carbon monoxide is due to its greater affinity for haemoglobin as compared to oxygen, approximately by **[AIPMT 1995]**

(A)200 timesCorrect
(B)1000 times
(C)2 times
(D)20 times

Answer: (A)

Solution

Carbon monoxide binds to haemoglobin roughly 200 times more strongly than oxygen does, forming stable carboxyhaemoglobin that blocks oxygen transport, which is why even low concentrations

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Question ID VK-130195