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Question

Plasmid is a:


A

Part of plasma membrane

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B

Extra chromosomal DNA in bacterial cell

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C

Fungus

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D

Plastid

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Solution

The correct option is B

Extra chromosomal DNA in bacterial cell


Plasmids are small, double stranded, closed circular symbiotic DNA molecules that occur naturally in bacteria outside the bacterial chromosome. They have the capability to self-replicate in the cytoplasm of the bacterial cell and are used as carriers for transferring a fragment of foreign DNA into a suitable host.


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