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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): Plasmids and bacteriophages are widely used as cloning vectors in recombinant DNA technology. Reason (R): They replicate within bacterial cells under the direct control of chromosomal DNA. In the light of the above statements, choose the most appropriate answer from the options given below:

Options

  1. ABoth Assertion (A) and Reason (R) are correct and Reason (R) is the correct explanation of Assertion (A)
  2. BBoth Assertion (A) and Reason (R) are correct but Reason (R) is not the correct explanation of Assertion (A)
  3. CAssertion (A) is correct but Reason (R) is not correct
  4. DAssertion (A) is not correct but Reason (R) is correct

Correct answer

C. Assertion (A) is correct but Reason (R) is not correct

Step-by-step solution

Plasmids and bacteriophages are widely used as cloning vectors because they have the ability to replicate within bacterial cells independent of the control of chromosomal DNA. They possess their own origin of replication (ori) which allows them to act as autonomous replicons. Therefore, the Assertion is correct, but the Reason is incorrect because it falsely states their replication is under chromosomal control. Answer: Assertion (A) is correct but Reason (R) is not correct

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