NEET 2001 Biology question

What is true for plasmid : -

(1)Plasmids are widely used in gene transferCorrect
(2)These are found in virus
(3)Plasmid contain gene for vital activities
(4)These are main part of chromosome

Answer: (1)

Solution

Plasmids are small, circular, extrachromosomal, self-replicating DNA molecules of bacteria. Because they can be cut with restriction enzymes and joined to foreign DNA, they are the most widely used vectors for gene transfer in recombinant DNA technology, so (1) is correct.

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Question ID VK-088838