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    Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction-enzyme?
    Question

    Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction-enzyme?

    A.

    5’ CACGTA 3’, 3’ CTCAGT 5’

    B.

    5’ CGTTCG 3’, 3’ ATGGTA 5’

    C.

    5’ GAATAG 3’, 3’ CTACTA 5’

    D.

    5’ GAATTC 3’, 3’ CTTAAG 5’

    Correct option is D


    The sequence GAATTC is a palindromic sequence recognized and cut by the restriction enzyme EcoRI. It reads the same forward and backward on complementary strands.

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