Enzymes that catalyse the removal of groups from the substrates by a mechanism other then hydrolysis are called

Options

A. Transferase
B. Lyases
C. Isomerases
D. Ligases

Answer

To solve the question "Enzymes that catalyse the removal of groups from the substrates by a mechanism other than hydrolysis are called," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**:
The question is asking for the specific type of enzyme that removes groups from substrates without using hydrolysis.

2. **Analyze the Options**:
We need to evaluate each option provided to determine which one fits the description.

3. **Evaluate Option 1: Transferease**:
- Transfereases are enzymes that transfer specific functional groups from one molecule to another.
- Since they do not specifically catalyze the removal of groups, this option is incorrect.

4. **Evaluate Option 2: Lyase**:
- Lyases are enzymes that catalyze the removal of groups from substrates without hydrolysis.
- They often form double bonds or new rings in the process.
- This option fits the description perfectly, making it a strong candidate for the correct answer.

5. **Evaluate Option 3: Isomerase**:
- Isomerases are enzymes that convert a molecule from one isomer to another.
- They do not remove groups, so this option is also incorrect.

6. **Evaluate Option 4: Ligase**:
- Ligases are enzymes that join two large molecules by forming a new chemical bond.
- They do not catalyze the removal of groups, making this option incorrect as well.

7. **Conclusion**:
After evaluating all the options, the correct answer is **Lyase**, as it is the enzyme that catalyzes the removal of groups from substrates by a mechanism other than hydrolysis.

### Final Answer:
**Lyase**