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Question
Differentiate between the following:
Plasmolysis and deplasmolysis
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Solution
| Plasmolysis | Deplasmolysis | ||
| 1 | It refers to the shrinkage of the cytoplasm and withdrawal of the plasma membrane from the cell wall caused due to the withdrawal of water when placed in a hypertonic solution. | 1 | Deplasmolysis is the recovery of a plasmolysed cell when it is placed in water, wherein the cell's protoplasm again swells up due to the re-entry of water. |
| 2 | In Plasmolysis, the cell becomes flaccid. | 2 | In deplasmolysis, the cell becomes turgid. |
RELATED QUESTIONS
A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker the potato cube increased in size, in the second beaker the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment:
(i) Give the technical terms of the solutions used in beakers, 1, 2 and 3.
(ii) In beaker 3, the size of the potato cube remains the same. Explain the reason in brief.
(iii) Write the specific feature of the cell sap of root hairs which helps in absorption of water.
(iv) What is osmosis?
(v) How does a cell wall and a cell membrane differ in their permeability?
Leaves of the sensitive plant wilt and droop down on a slight touch. What mechanism brings about this change?
Define the following:
Osmosis
Give Reasons for the following.
Freshwater fish cannot survive in seawater.
Give a diagrammatic representation of plasmolysis in a cell.
Give Technical Term for the following.
Solutions which have the same osmotic pressure.
Name the following:
The pressure through which water can rise upto some feet.
Fill in the Blank
When there is no movement of water in the cell from the outside medium, the medium is considered to be ______ to cell sap.
Fill in the Blank
A plasmolysed cell has __________ protoplast.
Multiple Choice Question:
When a plant wilts, the sequence of events will be as follows:
