In Figure 3

Multiple Choice

In Figure 3.2, the solid line depicts normal hemoglobin. How does the normal curve change when the 2,3-bisphosphoglycerate (2,3-BPG) concentration is reduced?

A) The oxygen half-saturation pressure value P50 of the new hemoglobin saturation curve is reduced.
B) The maximal saturation of hemoglobin with oxygen is reduced to less than a value of 1.0.
C) The oxygen partial pressure (pO₂) at which hemoglobin attains a Y-axis value of 0.25 is increased.
D) The new curve has a Y-axis value of 0.25 at a pO₂ of 26 mm Hg.
E) The new curve has a reduced slope at the P50 value of 26 mm Hg.