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CET Karnataka Medical CET - Karnataka Medical Solved Paper-2013

  • question_answer
    The sequence of nitrogenous bases in one strand of DNA are \[3TAC\text{ }GCG\text{ }ACG\text{ }5.\]The complementary DNA strand should have

    A)  \[5\,AUG\,\,CGC\,\,\,TGC\,3\]

    B) \[3ATG\,\,CGC\,\,TGC\,5~\]                            .

    C)  5UAC GCG ACG 3

    D)  \[5ATG\text{ }CGC\text{ }TGC\text{ }3\]

    Correct Answer: D

    Solution :

    : Two strands of DNA molecules are held together by hydrogen bonds between their bases. Adenine [A], a purine of one chain lies exactly opposite thymine [T], a pyrimidine of the other chain. Similarly, Cytosine (C, a pyrimidine) lies opposite guanine [G] a purine. Thus the complementary strand would be 5 - ATG CGC TGC-3.


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