2. Sample Papers
  3. NEET

NEET Sample Paper NEET Sample Test Paper-78

  • question_answer
    In DNA of E. coli has \[20\,%\] bases of guanine. What will be fraction of thymine?

    A)  30                               

    B)  3                      

    C)  15                               

    D)  5

    Correct Answer: A

    Solution :

    \[\operatorname{G}=20\,%\] As        \[C=G\] \[\operatorname{C}=20\,%\] \[\operatorname{C}+G=20+20=40%\] We know \[\operatorname{A}+T=G+C\]     (Chargaff?s rule) \[\therefore \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\operatorname{A}+T=100-40=60\] Also,    \[A=T\] \[\Rightarrow \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,T=\frac{60}{2}=30\]


You need to login to perform this action.
You will be redirected in 3 sec spinner