The Largest Proportion of CO₂ Carried by the Blood Is

Multiple Choice

The largest proportion of CO₂ carried by the blood is in the form of

A) bicarbonate ions (HCO₃^-) carried in the plasma.
B) molecular CO₂ dissolved in the plasma.
C) bicarbonate ions (HCO₃^-) carried within the red blood cells.
D) molecular CO₂ chemically bound to hemoglobin.
E) molecular CO₂ chemically bound to myoglobin.