Which of the Following Is the First Step in the Mechanism

question 5

Multiple Choice

Which of the following is the first step in the mechanism of the reaction shown below?

• A)Carboxylate ion attacks the thiol.
• B)Carboxylate ion attacks the α-phosphorus of ATP.
• C)Carboxylate ion attacks the γ-phosphorus of ATP.
• D)Thiol molecule attacks the β-phosphorus of ATP.
• E)Thiol molecule attacks the acyl group.

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