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.

B

The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell.

C

The concentration of water molecules is same in the cell and in the surrounding medium.

D

Concentration of water molecules does not matter.

Medium
Solution
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Correct option is B)

  • 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. In another words when the concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell.

So, the correct answer is option B.

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