According to IUB system, isomerases belong to which class?

Options

A. I
B. III
C. V
D. IV

Answer

To determine which class isomerases belong to according to the IUB (International Union of Biochemistry) system, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the IUB Classification**: The IUB system classifies enzymes into six main classes based on the type of reaction they catalyze.

2. **Identify the Classes**: The six classes of enzymes are:
- Class 1: Oxidoreductases
- Class 2: Transferases
- Class 3: Hydrolases
- Class 4: Lyases
- Class 5: Isomerases
- Class 6: Ligases

3. **Focus on Isomerases**: Isomerases are enzymes that catalyze the rearrangement of molecules, converting them from one isomer to another.

4. **Locate Isomerases in the Classification**: According to the IUB classification, isomerases are specifically categorized under Class 5.

5. **Conclusion**: Therefore, isomerases belong to Class 5 in the IUB system.

### Final Answer:
Isomerases belong to Class 5 according to the IUB system.

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