DUMET Medical DUMET Medical Solved Paper-2004

  • question_answer
    The reason for double helical structure of DNA is operation of:

    A)  electrostatic attractions

    B)  van der Waals forces

    C)  dipole-dipole interactions

    D)  hydrogen bonding

    Correct Answer: D

    Solution :

    DNA molecule has double helical because of hydrogen bonding between the nitrogenous bases of two strands.


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