Graduate Pharmacy Aptitude Test (GPAT) 2013 Solved Paper

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Question : 72 of 125

Marks: +1, -0

Living cells are negatively charged inside primarily because of............

ATP, organic acids, and other negative molecules that cannot escape
Removal of sodium ions, which are positively charged, by the Na+∕K pump
Extrusion of Ca‌2+ ion, which is much more concentrated outside a cell than inside
Cell membranes that are more permeable to potassium than sodium

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