Question

It is known that exposure to carbon monoxide is harmful to animals because

• A. It destroys haemoglobin.
• B. It reduces CO2 transport.
• C. It increases O2 transport.
• D. It increases CO2 transport.

Answer 1

Answer: (A)

Explanation of the correct option:

1. It destroys haemoglobin.
2. Carbon monoxide combines more readily with haemoglobin than oxygen does, and forms the stable compound carboxyhaemoglobin.
3. Thus, fewer molecules of free haemoglobin become actually available for oxygen transport, which becomes harmful to the animal.

Explanation of the incorrect option:

Option A,C and D didnot satisfy the appropriate explanation of the given question.

Final answer: It is known that exposure to carbon monoxide is harmful to animals because it increases CO2 transport.