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

Explanation

### Step-by-Step Text Solution:

1. **Definition of Mesosome**:
- A mesosome is a convoluted membranous structure found in prokaryotic cells. It is formed by the invagination (folding inward) of the plasma membrane.

2. **Functions of Mesosome**:
- **Synthesis of Cell Wall**: Mesosomes play a crucial role in the synthesis of the cell wall, which is essential for maintaining the shape and integrity of the bacterial cell.
- **Replication of DNA**: Mesosomes are involved in the replication of DNA, which is vital for cell division and reproduction in prokaryotic organisms.
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