Question:
Which one of the following gases converts haemoglobin into carboxy haemoglobin ?
Which one of the following gases converts haemoglobin into carboxy haemoglobin ?
Updated On: Mar 29, 2025
- CO
- O2
- NO
- CO2
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The Correct Option is A
Solution and Explanation
The gas that converts haemoglobin into carboxyhaemoglobin is carbon monoxide (CO).
Explanation:
- (A) CO (Carbon monoxide): Correct. Carbon monoxide binds strongly and irreversibly with haemoglobin, forming carboxyhaemoglobin, reducing oxygen-carrying capacity.
- (B) O₂ (Oxygen): Incorrect. Oxygen binds with haemoglobin to form oxyhaemoglobin, not carboxyhaemoglobin.
- (C) NO (Nitric oxide): Incorrect. Nitric oxide can bind to haemoglobin, forming nitrosyl haemoglobin, but it doesn't form carboxyhaemoglobin.
- (D) CO₂ (Carbon dioxide): Incorrect. Carbon dioxide binds reversibly with haemoglobin to form carbaminohaemoglobin, not carboxyhaemoglobin.
Conclusion:
The correct answer is Option (A): CO (Carbon monoxide).
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