Which of the Following Sequence of Events Best Explains the Mechanism

question 42

Multiple Choice

Which of the following sequence of events best explains the mechanism of carbamoyl phosphate synthetase?

• A) CO₂ and ATP form a carbonic-phosphoric anhydride (CPA), then NH₃ performs a nucleophilic attack on the CPA to form carbamate
• B) Activated CO₂ is transferred to biotin, then reacts with NH₃ to produce carbamate
• C) NH₃ reacts with ATP, which then reacts with CO₂ to produce carbamate
• D) NH₃ reacts with CO₂ to produce carbamate followed by reaction with ATP
• E) None of the above

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