Which of the following is not a hydrolase enzyme ?

Options

A. Protease
B. Lipase
C. Mutase
D. Carbohydrase

Answer

To determine which of the following is not a hydrolase enzyme, we need to analyze each option provided:

1. **Protease**: This enzyme catalyzes the hydrolysis of peptide bonds in proteins, breaking them down into smaller peptides or amino acids. Therefore, protease is a hydrolase enzyme.

2. **Lipase**: This enzyme catalyzes the hydrolysis of fats (lipids) into fatty acids and glycerol. Thus, lipase is also classified as a hydrolase enzyme.

3. **Mutase**: This enzyme belongs to the isomerase class. It catalyzes the rearrangement of functional groups within a molecule, specifically transferring a functional group from one position to another within the same molecule. Since it does not catalyze hydrolysis, mutase is not a hydrolase enzyme.

4. **Carbohydrase**: This enzyme catalyzes the hydrolysis of carbohydrates into simple sugars. Therefore, it is also a hydrolase enzyme.

Based on the analysis, the enzyme that is not a hydrolase is **mutase**.

### Final Answer:
**Mutase** is not a hydrolase enzyme.