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Question

______ are self replicating, extra chromosomal segments of double stranded circular and naked DNA, present in a bacterial cell.

A
Plasmids
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B
Nucleoid
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C
Mesosomes
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D
Bacteriophages
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Solution

The correct option is B Plasmids
Plasmids are self-replicating extra chromosomal DNA molecules found in Gram-negative and Gram-positive bacteria as well as in some yeast and other fungi. Although most of them are covalently closed circular double-stranded DNA molecules, recently linear plasmids have been isolated from different bacteria.

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