What is a mesosome in a prokaryotic cell? Mention the functions that it performs.

Explanation

### Step-by-Step Solution:

1. **Definition of Mesosome**:
- A mesosome is an infolding of the plasma membrane found in prokaryotic cells. It is a structure that increases the surface area of the cell membrane.

2. **Increased Surface Area**:
- The infoldings of the plasma membrane create a larger surface area. This is significant because it allows for more space for various cellular processes to occur.

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