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Manipal Medical Manipal Medical Solved Paper-2001

  • question_answer
    E. coli with complete radioactive medium DNA was allowed to replicate in no radioactive medium for two generation. Percentage of bacteria with radioactive strand will be:

    A)  100%          

    B)  50%

    C)  25%           

    D)  20%

    Correct Answer: B

    Solution :

     E. coli with completely radioactive DNA was allowed to replicate in nonradioactive medium for 2 generations percentage of bacteria with radioactive DNA is 50% because in the first generation 100% bacteria will have one strand radioactive but in the next generation only 50% bacteria will have one radioactive strand.


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