In the de novo biosynthesis of uridine monophosphate (UMP) , in mammals, each of the following occurs, EXCEPT:
A) C02 is incorporated in the formation of the pyrimidine ring.
B) PRPP is incorporated after the pyrimidine ring is formed.
C) A 1-C-THF metabolite is utilized.
D) C02 is produced (decarboxylation) .
E) UTP is a feedback inhibitor of carbamoyl phosphate synthetase.
Correct Answer:
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