Directions for: The questions consist of two statements each, printed as assertion and reason. While answering these questions you are required to choose any one of the following five responses A. If both the Assertion and the Reason are true and the Reason is a correct explanation of the Assertion. B. If both the Assertion and the Reason are true but the Reason is not a correct explanation of Assertion. C. If the Assertion is true but the Reason is false. D. If both the Assertion and the Reason are false. E. If Assertion is false but Reason is true.
Assertion: Plasmids are extra chromosomal DNA. Reason: Plasmids are found in bacteria and are useful in genetic engineering,A) A
B) B
C) C
D) D
E) E
Correct Answer: A
Solution :
Plasmids are self-replicating, circular, extra chromosomal, double stranded, DNA molecules commonly occur in the bacterial cells. Their size ranges from 1 x 106 to 200 x 106 Daltons. Due to self-replicating capacity and also due to antibiotic, heavy metal resistant power, plasmids are variously used in genetic engineering as vectors.
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