Plasmolysis in a plant cell is defined as

• (a) Breakdown of the plasma membrane in hypotonic medium
• (b) Shrinkage of protoplasm in hypertonic medium
• (c) Shrinkage of nucleoplasm
• (d) None of the above

Plasmolysis is a specific process that occurs in plant cells when they are placed in a hypertonic solution. This means that the concentration of solutes outside the cell is higher than inside. As a result, water moves out of the cell, leading to the shrinkage of the protoplasm away from the cell wall.

Correct Answer

The correct option is (b) Shrinkage of protoplasm in hypertonic medium.

Additional Information

• In a hypertonic environment, water exits the cell to balance solute concentrations.
• This process can affect the cell's turgor pressure, which is crucial for maintaining its structure.
• Plasmolysis can lead to wilting in plants if the condition persists.