Assertion :Plasmids are tools of genetic engineering. Reason: Virulence plasmids provide pathogenicity to bacteria.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Assertion is incorrect but Reason is correct.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
A plasmid is an extracellular chromosomal DNA possess three basic features: multiple cloning sites, an origin of replication and a selectable marker which makes it an ideal vector for genetic engineering. Virulence plasmids turn the bacterium into a pathogen by the translation of vir gene.
Therefore, the correct answer is option B.

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