DUMET Medical DUMET Medical Solved Paper-2008

  • question_answer
    Which is not correct according to Chargaffs rule?

    A)  \[A+T=C+G\]

    B)  \[A+G=C+T\]

    C)  \[\frac{A+G}{C+T}=1\]       

    D)  None of these

    Correct Answer: A

    Solution :

    According to Chargaffs rule, the total amount of adenine released is equal to the total amount of thymine and similarly the total amount of cystosine is equal to the total  amount of guanine, ie, A = T and C = G. It also  states that in natural DNAs the base ratio A/T is close to unity and C/G is also close to unity (A + C = T + G). Thus, in the given option except A  + T = C + G, all are correct,


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