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Question

Which of the following is a plasmid?

A
pBR322
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B
Bam HI
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C
Sal I
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D
Eco RI
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E
Hind III
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Solution

The correct option is A pBR322
The plasmid is an extrachromosomal genetic element of DNA or RNA that is capable of replicating independently of the host chromosome, e.g. E.coli plasmid pBR322. BamH I, Sal I and Hind III are restriction enzymes. A restriction enzyme or restriction endonuclease is an enzyme that cleaves DNA into fragments at or near specific recognition sites within the molecule known as restriction sites.

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