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NEET Sample Paper NEET Sample Test Paper-86

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

    A) Electrostatic attractions

    B) van der Waals forces

    C) Dipole - Dipole interactions

    D) Hydrogen bonding

    Correct Answer: D

    Solution :

    [d] The two polynucleotide chains of DNA molecules are twisted around a common axis but run in opposite directions to form a right handed helix. The two chains are joined together by specific hydrogen bonds.


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