In human body, the largest amount of the carbon dioxide produced by body cells is carried to the lungs as__:

Answer: [D] Bicarbonate ion dissolved in the plasma

Although a small amount of CO2 is carried by the red blood cells, most is carried as the bicarbonate ion in plasma. Carbon dioxide can travel in the bloodstream in many forms. It can mix with water and form carbonic acid. It can also attach to hemoglobin in red blood cells.

This question is a part of GKToday's Integrated IAS General Studies Module