Each of the following statements is correct EXCEPT which one?
A) Heme is the prosthetic group of myoglobin and certain cytochromes.
B) The ring structure of heme is composed of four pyrrole rings linked by one-carbon bridges.
C) In hemoglobin, one of the coordinate covalent linkages of each iron atom is to a histidine nitrogen.
D) The phenomenon of cooperativity is observed in the binding of oxygen to myoglobin.
E) The binding of BPG to beta chains of Hb decreases the affinity of alpha chains for oxygen.

Question

Quizplus · Accepted Answer

The phenomenon of cooperativity, where the binding of one oxygen molecule increases the affinity for additional oxygen molecules, is observed in hemoglobin, not myoglobin. Myoglobin has a single binding site for oxygen and does not exhibit cooperativity.

Each of the Following Statements Is Correct EXCEPT Which One