What are plasmids? Describe their role in bacteria.

Explanation

### Step-by-Step Solution:

1. **Definition of Plasmids**:
- Plasmids are small, circular, double-stranded DNA molecules that exist independently of chromosomal DNA within a bacterial cell. They can also be linear in some cases.

2. **Location in Bacteria**:
- Plasmids are typically found in the cytoplasm of bacterial cells, separate from the main bacterial chromosome, which is located in the nucleoid region.

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