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    How many restriction enzymes have been discovered till now?
    Question

    How many restriction enzymes have been discovered till now?

    A.

    More than 1000

    B.

    More than 900

    C.

    More than 800

    D.

    More 700

    Correct option is B

    till now more than 900 restriction enzymes have been isolated from over 230 strains of bacteria each of which recognise different recognition sequences

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