How many ATP molecules are necessary to make carbamoyl phosphate by carbamoyl phosphate synthetase (CPS)?
A) 1
B) 4
C) 2
D) 3
E) None of the above.

Question

Quizplus · Accepted Answer

Two ATP molecules are necessary to make carbamoyl phosphate by carbamoyl phosphate synthetase (CPS). One ATP molecule is used to phosphorylate bicarbonate to form carboxyphosphate, and then another ATP molecule is used to phosphorylate the amino group of glutamine to form carbamoyl phosphate.

How Many ATP Molecules Are Necessary to Make Carbamoyl Phosphate