Enzyme catalysing removal of groups and formation of double bond are

Options

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

Answer

To solve the question regarding which enzyme catalyzes the removal of groups and the formation of double bonds, we can analyze the options provided one by one.

### Step-by-Step Solution:

1. **Understanding Enzymes**: Enzymes are biological catalysts that speed up chemical reactions in living organisms. They are classified into different categories based on their functions.

2. **Analyzing the Options**:
- **Transferase**: These enzymes are responsible for transferring functional groups from one molecule to another. They do not catalyze the removal of groups or the formation of double bonds. Therefore, this option is incorrect.

- **Ligases**: Ligases are enzymes that join two molecules together, typically forming a new bond. They are not involved in the removal of groups or the formation of double bonds. Thus, this option is also incorrect.

- **Lyases**: Lyases are enzymes that catalyze the removal of groups from molecules, which often leads to the formation of double bonds. For example, they can remove a water molecule from a substrate, resulting in a double bond. This makes lyases the correct option for the question.

- **Oxidoreductases**: These enzymes are involved in oxidation-reduction reactions, where electrons are transferred between molecules. They do not specifically catalyze the removal of groups or the formation of double bonds, making this option incorrect as well.

3. **Conclusion**: Based on the analysis of each enzyme type, the correct answer to the question is **lyases**, as they catalyze the removal of groups and the formation of double bonds.

### Final Answer:
The enzyme catalyzing the removal of groups and formation of double bonds is **lyases**.

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