Cell: Structure and Functions
Cell: The Unit of Life
A RBC and a plant cell (with thick cell wall) are placed in distilled water. The solute concentration is the same in both the cells. What changes would be observed in them?
- Both plant cell and RBC would not undergo any change.
- The RBC would increase in size and burst while the plant cell would remain about the same size.
- The plant cell would increase in size and must burst while the RBC would remain about the same size.
- Both plant cell and RBC would decrease in size and collapse.
Correct Answer: Option(b)
Solution: Both the cells will gain water due to osmosis because the surrounding medium is hypotonic as compared to cell sap. The plant cell is however, surrounded by a cellulosic cell wall which is absent in animal cell. Hence, erythrocyte (animal cell) will burst due to expansion of protoplasm and the expanding protoplasm will exert a pressure on plant cell wall from inside (turgor pressure). The plant cell wall will exert an equal pressure in opposite direction on the protoplasm (wall pressure).