The extra-chromosomal DNA found in the bacterium E.coli is called _________.

Mesosome

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Nucleoid

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Incipient nucleus

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Plasmid

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Solution

The correct option is D Plasmid
The plasmid is the extrachromosomal DNA found in the bacterium of E.coli. It is the small extra-chromosomal DNA that is mostly circular in shape with double standard DNA strands. It separates from chromosomal DNA and replicates independently inside the cell. It is used as a tool in the process of genetic engineering.
So, the correct answer is option D.

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