Assertion :Restriction endonucleases recognize short palindromic sequence and cut at specific sites. Reason: When a restriction endonuclease acts on a palindrome, it cleaves both the strands of DNA molecule.

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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Both Assertion and Reason are incorrect

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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 palindromic sequence in DNA is one in which the 5' to 3' base pair sequence is identical on both strands. Restriction enzymes recognize and cut within specific palindromic sequences, known as restriction sites, in the DNA and produce DNA strands with the sticky ends. It cuts both the strands of DNA at the palindrome site. This is usually a 4- or 6 base pair sequence. Hence the assertion and reason are both correct but the reason does not explain the given assertion.
So the correct answer is option B.

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Similar questions

Q. Assertion :Restriction endonuclease recognize short palindromic sequence and cut at specific sites. Reason: When a restriction endonuclease acts on palindrome, it cleaves both the strands of DNA molecule.

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ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

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Reason (R) Reactant molecules undergo chemical change irrespective of their orientation during collision.

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Q. Assertion
If BOD level of water in reservoir is less than 5 ppm it is not polluted.

Reason
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