In bacteria, plasmid is:-

Options

A. Extra chromosomal material
B. Main DNA
C. Non functional DNA
D. Repetitive gene

Answer

**Step-by-Step Solution:**

1. **Understanding Plasmids**: Begin by defining what a plasmid is. Plasmids are small, circular, double-stranded DNA molecules that are distinct from a cell's chromosomal DNA.

2. **Characteristics of Plasmids**: Recognize that plasmids are self-replicating, meaning they can replicate independently of the chromosomal DNA within the bacterial cell.

3. **Function of Plasmids**: Note that plasmids often carry genes that can provide advantages to the bacteria, such as antibiotic resistance, but they typically contain only a few genes.

4. **Location of Plasmids**: Understand that plasmids exist as extra-chromosomal material, meaning they are not part of the main chromosomal DNA found in the nucleus (which bacteria do not have, as they are prokaryotic organisms).

5. **Comparison with Other DNA**: Differentiate plasmids from the main bacterial DNA. While the main DNA is essential for the basic functions and reproduction of the bacteria, plasmids provide additional traits that may be beneficial under certain conditions.

6. **Conclusion**: Based on the characteristics and functions of plasmids, conclude that in bacteria, plasmids are classified as extra-chromosomal material.

**Final Answer**: In bacteria, plasmid is extra chromosomal material.

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