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    Question

    What structural model of DNA was proposed by Watson and

    Crick in 1953?
    A Single helix Correct Answer Incorrect Answer
    B Triple helix Correct Answer Incorrect Answer
    C Quadruple helix Correct Answer Incorrect Answer
    D Double helix Correct Answer Incorrect Answer
    E None of these Correct Answer Incorrect Answer

    Solution

    Watson and Crick proposed the "double helix" structure of DNA, which consists of two intertwined strands forming a spiral staircase-like structure.

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