Question

Hemoglobin in humans has the highest affinity for which of the following gases?

• A. Methane
• B. Carbon Monoxide
• C. Nitrous oxide
• D. Carbon dioxide

Answer 1

Answer:

B. Carbon Monoxide

Hemoglobin in humans has a very high affinity for carbon monoxide, forming carboxyhemoglobin which is a very bright red in color. Carbon monoxide is thus problematic for humans because it has affinity higher than that of oxygen.