Enzyme immobilisation is

Options

A. Conversion of an active enzyme into inactive form
B. Providing enzyme with protective covering
C. Changing a soluble enzyme into insoluble state
D. Changing pH so that enzyme is not able to carry out its functions

Answer

### Step-by-Step Solution:

1. **Understanding Enzyme Immobilization**:
- Enzyme immobilization refers to the process where enzymes are confined or localized in a certain area, preventing them from moving freely. This can enhance their stability and reusability in various applications.

2. **Analyzing the Options**:
- **Option 1**: Conversion of an active enzyme into an inactive form.
- This option does not describe enzyme immobilization. Instead, it refers to the inactivation of enzymes, which is the opposite of what immobilization aims to achieve.

- **Option 2**: Providing an enzyme with protective covering.
- This option correctly describes enzyme immobilization. By providing a protective covering, the enzyme is shielded from harmful substances and conditions that could lead to its degradation or inactivation.

- **Option 3**: Changing a soluble enzyme into an insoluble form.
- While this may relate to some immobilization techniques, it does not fully encompass the concept of enzyme immobilization, which focuses more on protection and stability rather than just solubility.

- **Option 4**: Changing the pH so that it cannot carry out its function.
- This option is incorrect as it suggests altering conditions to inhibit enzyme activity, which is contrary to the goal of immobilization.

3. **Conclusion**:
- After analyzing all the options, the correct answer is **Option 2**: "Providing an enzyme with protective covering." This encapsulates the essence of enzyme immobilization by ensuring that the enzyme remains active and protected from adverse conditions.