Iron Classification in Hemoglobin
Iron binds tightly to the heme group in the protein hemoglobin. What type of helper molecule is iron considered to be in this context?
A
A cofactor and a coenzyme
B
A cofactor only
C
A prosthetic group and a cofactor
D
A coenzyme only
E
A coenzyme, a cofactor, and a prosthetic group
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