Question

Compare the statement A and B.
Statement A : To counteract the increase in turgor pressure in plant cells, the cell wall produces an equal and opposite pressure, ie, wall pressure.
Statement B : When plant cells undergo endosmosis, they swell but do not burst.
Select the correct description.

• A. Statement A is wrong and B is correct
• B. Both the statement A and B are correct and A is not the reason for B
• C. Both the statement A and B are correct and A is the reason for B
• D. Statement A is correct and B is wrong

Answer 1

The correct option is C Both the statement A and B are correct and A is the reason for B

In a hypoosmotic solution, a plant cell will take up water and become turgid. As long as the plasma membrane is intact, the turgor pressure of a cell is equal and opposite to the wall pressure. This is the main source of structural support in herbaceous plants. Plant cells are enclosed by a rigid cell wall. When the plant cell is placed in a hypotonic solution, it takes up water by osmosis and starts to swell, but the cell wall prevents it from bursting. The plant cell is said to have become turgid i.e., swollen and hard. The pressure inside the cell rises until this internal pressure is equal to the pressure outside. This liquid or hydrostatic pressure called as the turgor pressure prevents further net intake of water.