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Question

A cell will swell up if________________

A
The concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium.
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B
The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell.
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C
The concentration of water molecules is same in the cell and in the surrounding medium.
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D
Concentration of water molecules does not matter.
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Solution

The correct option is C The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell.
The cell swells up when endosmosis occurs. Endosmosis is a process in which the water molecules move from outside to the inside of the cell through the cell membrane. This occurs when the solution is hypotonic, i.e., the cell has a lower solute concentration than the surrounding medium.

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