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ICSE Class 10 Biology Question 21 of 21

Multiple-Choice Questions — Question 21

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Question 21

A cell of a leaf of an aquatic plant is kept in a 5% salt solution for some time. The phenomenon which will take place is/are:

  1. turgidity
  2. plasmolysis
  3. turgidity and flaccidity
  4. plasmolysis and flaccidity
Answer

plasmolysis and flaccidity

Reason — When a cell of an aquatic plant is placed in a 5% salt solution (which is hypertonic to the cell), water will move out of the cell due to osmosis. This causes the cell membrane to shrink away from the cell wall, leading to plasmolysis. As a result, the cell will lose its firmness, becoming flaccid. Therefore, both plasmolysis and flaccidity will occur.