UPSC General Studies Sample Paper General Studies Sample Paper-6

  • question_answer
    With reference to 'stem cells', which of the following statements are correct?
    1. Stem cells are unspecialised.
    2. Stem cells are capable of dividing and renewing.
    3. Stem cells can give rise to specialised cells.
    Select the correct answer using the codes given below.

    A)  1 and 3

    B)                     1 and 2            

    C)  2 and 3           

    D)  All of these

    Correct Answer: D

    Solution :

    [d] One of the fundamental properties of a stem cell is that it does not have any tissue specific structure that allow it to perform specialised functions. However, unspecialised stem cells can give rise to specialised cells, including heart muscle cells, blood cells or nerve cells. Unlike muscle cells, blood cells or nerve cells, which do not normally replicate themselves stem cells may replicate many times. This process is called proliferation. When unspecialised stem cells give rise to specialised cell, the process is called differentiation.

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