The catabolism of hemoglobin
A
Involves oxidative cleavage of the porphyrin ring
B
Results in the liberation of carbon monoxide
C
Occurs in red blood cells
D
Results in the formation of protoporphyrinogen
E
Is the sole source of bilirubin
Correct Answer: Involves oxidative cleavage of the porphyrin ring, Results in the liberation of carbon monoxide