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Where is a plasmid commonly found?

Answer and explanation

Correct answer: In bacterial cells

The governing concept is the nature and location of plasmids. A plasmid is a small, usually circular, double-stranded DNA molecule that exists separately from the main bacterial chromosome. It commonly occurs in bacteria and can replicate independently when the host provides suitable conditions. Some plasmid-like elements occur in other organisms, but the standard school-level answer is bacterial cells. Thus option A is correct. Mature human red blood cells lack a nucleus and do not normally contain plasmids; a viral coat is a protein structure, not the usual location of plasmid DNA; and the outside of a plant root is not a cellular location for plasmids. Plasmids are also important cloning vectors.

Related tags

PlasmidBacteriaCloning VectorCloning VectorsPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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