NEET Biology question

Plasmid vector in DNA recombinant technology means **[NEET 2014]**

(A)Virus that transfers a gene to bacteria
(B)Extra-chromosomal, autonomously replicating circular DNACorrect
(C)Sticky end of DNA
(D)Any fragment of DNA carrying a desirable gene

Answer: (B)

Solution

A plasmid is, by definition, a small, circular, double-stranded DNA molecule that exists separately from the bacterial chromosome ("extra-chromosomal") and can replicate independently of it ("autonomously replicating") — this is exactly what makes it useful as a cloning

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Question ID VK-125319