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Question
Give reason for the following:
A plant cell, when kept in a hypertonic salt solution for about 30 minutes, turns flaccid.
Solution
In a hypertonic solution, the solution outside the cell has a higher solute concentration than the fluids inside the cell. Therefore, water flows out of the plant cell due to exosmosis. The cytoplasm shrinks, the plasma membrane withdraws away from the cell wall and the cell becomes flaccid. Hence, a plant cell, when kept in a hypertonic salt solution for about 30 minutes, turns flaccid.
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RELATED QUESTIONS
The diagram given below represents a plant cell after being placed in a strong sugar solution. Study the diagram and answer the questions that follow:
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- Name the structure that acts as a selectively permeable membrane.
- Label the parts numbered 1 to 4 in the diagram.
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The state of a cell in which the cell wall is rigid and stretched by the increase in volume due to the absorption of water is called.
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If you sprinkle some common salt on grass growing on a lawn, it is killed at that spot.
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1. Cell wall
2. Plasma membrane.
3. Protoplasm
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5. Nucleus
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(i) What is the state of the cell shown in the diagram?
(ii) Name the structure which acts as a selectively permeable membrane.
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The pressure exerted by cell contents on a plant cell wall.
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Fill in the Blank
Wilting and drooping of leaves is due to loss of ________.
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