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MGIMS WARDHA MGIMS WARDHA Solved Paper-2014

  • question_answer
    What do you mean to the mutation in which replacement of a nucleotide occur by another similar type?

    A)  Inversion                 

    B)  Transition substitution

    C)  Transversion substitution

    D)  Insertion frame-shift

    Correct Answer: B

    Solution :

                    In transition substitution, one nitrogenous base is replaced by another of similar type, e. g.,\[A\rightleftharpoons G,\]\[C\rightleftharpoons T\]. It is induced by tautomerisation (due to rearrangement of H-atoms). The     \[-N{{H}_{2}}\] into\[-NH\]or\[-CO\]into\[-COH\].


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