Manipal Medical Manipal Medical Solved Paper-2013

  • question_answer
    How many mitotic divisions must occur in a cell of root tip to form 256 cells.

    A)  256                 

    B)  8

    C)  128                 

    D)  64

    Correct Answer: C

    Solution :

     \[1\xrightarrow[{}]{{}}2\xrightarrow[{}]{2}4\xrightarrow[{}]{3}8\xrightarrow[{}]{4}16\xrightarrow[{}]{5}5\]      \[\downarrow 5\]      \[32\xrightarrow[{}]{6}64\xrightarrow[{}]{7}\underset{\begin{smallmatrix}  \downarrow 2 \\  256 \end{smallmatrix}}{\mathop{128}}\,\] It can be done with a simple formula \[{{(2)}^{n}},\]where n is the number of mitotic, division \[{{(2)}^{n}}=256\] \[{{(2)}^{8}}=256(2\times 2\times 2\times 2\times 2\times 2\times 2\times 2=256)\] So, 8 mitotic division.


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