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The extra chromosomal, self-replicating, double stranded, closed, circular DNA molecules are called ____________

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The extra chromosomal, self-replicating, double stranded, closed, circular DNA molecules are called ____________

(a) Viruses

(b) Phages

(c) Chloroplasts

(d) Plasmids
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Right choice is (d) Plasmids

Explanation: Plasmids are the extra chromosomal elements, which are self-replicating.
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