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CMC Medical CMC-Medical Ludhiana Solved Paper-2012

  • question_answer
    There are special proteins that helps to open up DNA double helix in the front of replication fork. These proteins are

    A)  DNA ligase        

    B)  DNA gyrase

    C)  DNA polymerase            

    D)  None of these

    Correct Answer: B

    Solution :

                    DNA gyrases is the type of class II topoisomerase, which helps to open a DNA double helix in front of replicaton fork. It causes negative supercoiling of DNA. DNA polymerase is involved in synthesis of new DNA strand. DNA ligases joins the nicks present in between Okazaki fragments.


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