Question

Why do bacteria have plasmid?

Answer 1

Gaining EXTRAnuclear DNA allows the transfer of antibiotic resistance between bacterial species. That is: it's an evolutionary advantage for the germs allowing them to live longer, (makes patients more ill though).

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Answer 2

Why do bacteria have plasmid?

➔ A plasmid is a small DNA molecule within a cell that is physically separated from a chromosomal DNA and can replicate independently.