Biology · Respiration and Toxicology

Carbon monoxide poisoning is a common type of fatal air poisoning. What makes carbon monoxide (CO) such a dangerous gas?

Verified Solution4 OptionsUpdated: October 2026👁️1 View

1CO instantly converts into carbon dioxide in the presence of water in the blood
2CO dissolves completely in blood plasma and spreads cellular toxicity
3CO has a much higher affinity than oxygen to bind with haemoglobin✓
4CO dissolves in cytoplasm and functions as an inhibitor of the crucial enzymes for metabolism

Correct answer

CO has a much higher affinity than oxygen to bind with haemoglobin

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