Which of the following is a plasmid?

pBR322

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Bam HI

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Sal I

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Eco RI

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Solution

The correct option is A pBR322
A plasmid is an extrachromosomal genetic element of DNA or RNA, that is capable of replicating independently of the host chromosome. Among the 4 choices, only pBR322 is a plasmid. The remaining three options are restriction enzymes. The restriction enzymes help in cutting DNA, including plasmids, at specific sequences, in the form of sticky or blunt ends.

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