Question

A plasmolysed cell can be deplasmolysed by placing it in

• A. Isotonic solution
  
• B. Saturated solution
  
• C. Pure water or hypotonic solution
  
• D. Hypertonic solution.

Answer 1

The correct option is C

Pure water or hypotonic solution

Plasmolysis is defined as the process of contraction or shrinkage of the protoplasm of a plant cell occurred due to loss of water in the plant cell. This condition is a result of the removal of water from cytoplasm due to exo-osmosis when placed in hypertonic solution.
When you place a plasmolysed cell in a hypotonic solution, (the solution in which solute concentration is less than the cell sap), the water travels into the cell due to the higher concentration of water outside the cell. Then the cell swells and becomes turgid. This is known as deplasmolysis.