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Example Questions
Example Question #1 : Protein Catabolism Regulation
Which enzyme catalyzes the rate-limiting step of the urea cycle?
Possible Answers:
Ornithine transcarbamylase
Carbamoyl phosphate dehydrogenase
Argininosuccinate lyase
Carbamoyl phosphate synthetase
Correct answer:
Carbamoyl phosphate synthetase
Explanation:
Carbamoyl phosphate synthetase is the rate-limiting step of the urea cycle. It is the first step of the urea cycle and occurs exclusive in the mitochondria of hepatic and renal cells.
Diane
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Syracuse University, Bachelor of Science, Biochemistry. Drexel University, Master of Science, Health Sciences, General.
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