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Manipal Medical Manipal Medical Solved Paper-2015

  • question_answer
    \[N{{a}^{+}},{{K}^{+}}\]pump is found in membranes of   many cells, like nerve cells. It work against    eleccrochemical gradient and involve an     integral protein ATP. For each molecule of ATP used

    A) 3 ions of \[N{{a}^{+}}\]pumped out and \[2{{K}^{+}}\]are taken in

    B) 3 ions of \[N{{a}^{+}}\]are taken in and \[2{{K}^{+}}\] are pumped out

    C) 2 ion of \[N{{a}^{+}}\]are thrown out and \[3{{K}^{+}}\]are     absorbed                                     

    D) 3 ion of \[{{K}^{+}}\]are absorbed and 3\[N{{a}^{+}}\]are pumped out

    Correct Answer: A

    Solution :

    Energy from ATP cause confirmational change in the solute carrier complex. From energy of one ATP, 3 \[N{{a}^{+}}\]pumnped outside and \[2{{K}^{+}}\]are taken in. This process is done against the electrochemical gradient. It is also known as sodium-potassium exchange pump of the cell.


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