Question

The type of carboxypeptidase metalloenzyme and the metal ion present in it, respectively, are

• A. hydrolase and Zn(II)
• B. isomerase and Zn(II)
• C. hydrolase and Cu(II)
• D. isomerase and Cu(II)

Hint:

Carboxypeptidases are metalloenzymes that require Zn(II) for their activity in breaking peptide bonds.

Answer 1

The Correct Option is A

Step 1: Understanding carboxypeptidase.
Carboxypeptidases are enzymes that catalyze the hydrolysis of the peptide bond at the carboxyl end of a protein. They are classified as hydrolases.
Step 2: Role of metal ions in carboxypeptidase.
Carboxypeptidase requires a metal ion for its catalytic activity. The most common metal ion found in carboxypeptidase enzymes is Zn(II), which plays a crucial role in activating the water molecule needed for hydrolysis.
Step 3: Conclusion.
The correct classification for carboxypeptidase is hydrolase, with the metal ion Zn(II) present.
Final Answer: \[ \boxed{\text{Hydrolase and Zn(II)}} \]