Immobilised Yeast is

Options

A. Preserved for future use
B. Little active in fermentation
C. 20 times more efficient
D. Food Yeast

Answer

### Step-by-Step Solution:

1. **Understanding Immobilised Yeast**:
- Immobilised yeast refers to yeast cells that are physically confined within a certain medium, allowing them to retain their biological activity while being used in various applications, particularly fermentation.

2. **Definition and Method**:
- Immobilisation typically involves trapping yeast cells in a gel-like substance, such as calcium alginate. This method allows the yeast to be reused multiple times in fermentation processes.

3. **Benefits of Immobilised Yeast**:
- One of the significant advantages of using immobilised yeast is that it can be preserved for future use. This means that once the yeast is immobilised, it can be stored and used later without losing its effectiveness.

4. **Efficiency of Immobilised Yeast**:
- Immobilised yeast is known to be significantly more efficient than free yeast cells. It has been reported that immobilised yeast can be up to 20 times more efficient in fermentation processes compared to normal, free yeast.

5. **Conclusion**:
- Based on the understanding of immobilised yeast and its benefits, the correct answer to the question "Immobilised Yeast is" is that it is "20 times more efficient" than normal yeast.

### Final Answer:
- **Immobilised Yeast is 20 times more efficient than normal yeast.**

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