Which of the Following Statements About the Binding of Oxygen

Multiple Choice

Which of the following statements about the binding of oxygen by hemoglobin is false?

A) The percentage of completely O₂-saturated hemoglobin increases as P_O2 increases.
B) The oxygen-binding curve is S-shaped.
C) There is a narrow range of the O₂-binding curve where O₂ dissociation-association is rapid.
D) A very low P_O2 is required for all four hemoglobin subunits to bind to O₂.
E) If one subunit of a completely oxygen-saturated hemoglobin loses its O₂, the affinity of the remaining subunits for their O₂ increases.