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Question

Assertion :Recognition site should be preferably single and responsive to commonly used restriction enzymes. Reason: In pBR322 alien DNA is ligated generally in the area of BamHI site of tetracycline resistance gene.

A
Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
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B
Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
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C
Assertion is correct but Reason is incorrect
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D
Both Assertion and Reason are incorrect
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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Recognition site should be preferably single and responsive to commonly used restriction enzymes so it can be easily fragmented out. It should be single because we only want a cut at the required gene.
In pBR322 alien DNA is ligated in the area of Bam - HI site of tetracycline resistance gene. Hence there is only one recognition site where the cut is made.
So the correct answer is ' Both Assertion and Reason are correct and Reason is the correct explaination for the Assertion'.

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