Name the Hemoglobin that is bonded to carbon monoxide and therefore cannot transport oxygen?

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Methemoglobin

Carbaminohemoglobin

Carboxyhemoglobin

Reduced hemoglobin

answer is A.

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Detailed Solution

Hemoglobin is a protein present in red blood cells that bind to oxygen to transport it throughout the body. However, hemoglobin can also bind to other molecules, such as carbon monoxide (CO), which is a toxic gas produced by the incomplete combustion of carbon-containing fuels.

When hemoglobin binds to carbon monoxide, it forms carboxyhemoglobin (COHb or HbCO), which is unable to transport oxygen effectively. This can lead to carbon monoxide poisoning, a potentially life-threatening condition.

Methemoglobin is a form of hemoglobin that is unable to bind to oxygen due to oxidation of the iron atom in its heme group, reduced hemoglobin has released oxygen and is ready to bind more oxygen and carbaminohemoglobin is a form of hemoglobin that has bound to carbon dioxide (CO₂) instead of oxygen. This helps to transport CO₂ from the body's tissues to the lungs for elimination.

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