RAJASTHAN PMT Rajasthan - PMT Solved Paper-2008

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

    A)  van der Waals forces

    B)         dipole-dipole interaction

    C)         hydrogen bonding

    D)         electrostatic attractions

    Correct Answer: C

    Solution :

    Hydrogen bonding is involved molecular force in the DNA molecule. Watson and Crick observed the purine-pyrimidine type of hydrogen bonding (instead of purine-purine and pyridine-pyridine)


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