The Dissociated Subunits of Hemoglobin Have a Much Higher Affinity

Multiple Choice

The dissociated subunits of hemoglobin have a much higher affinity for oxygen than the intact molecule. Which of the following is the most likely explanation?

A) BPG can interact much more readily with the dissociated subunits.
B) The iron atom moves out of the plane of the heme.
C) The heme dissociates from the globin.
D) The Bohr effect operates more effectively.
E) The allosteric effects reducing oxygen affinity require the intact tetramer.