M12233The enzyme which catalyzes the committed step in the biosynthesis of pyrimidine nucleotides in humans is
A) mitochondrial carbamoyl phosphate synthetase I.
B) dihydroorotatase.
C) aspartate transcarbamoylase.
D) orotidylate decarboxylase.
E) cytoplasmic carbamoyl phosphate synthetase II.
Correct Answer:
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