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प्रश्न
Multiple Choice Question:
In the process of osmosis in a cell:
पर्याय
Both protoplasm and cell wall act as a membrane
Only cell wall acts as a membrane
Only outermost layer of protoplast acts as a membrane
The entire protoplast acts as a membrane
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उत्तर
The entire protoplast acts as a membrane
संबंधित प्रश्न
Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypertonic salt solution
Distinguish between the following:
Plasmolysis and deplasmolysis
Name the following:
Movement of molecules from a region of high concentration to a region of low concentration.
Give Reasons for the following.
We gargle with saline water in case of throat infection.
The diagram given below is of an experiment just at the start. Study the diagram carefully and answer the following questions :
(i) What does the experiment demonstrate?
(ii) Define, the process demonstrated in the experiment.
(iii) What changes are observed after a few hours?
(iv) Give two examples of a semi-permeable membrane.
(v) Which limb of the U-tube contains a more concentrated sucrose solution, A or B?
(vi) Why is the membrane separating the two solutions labeled as semi-permeable membrane?
In an experiment, two sets of apparatus were set up as shown below:
In A there is a concentrated sugar solution inside the thistle funnel and red ink in the water outside the funnel. In B there is a concentrated glucose solution with red ink inside the thistle funnel and water outside the thistle funnel.
In both A and B the level of liquid inside the funnels rises up the tubes. In A the sugar solution turns red and in B, the water turns red.
Study the given observations and answer these questions:
- Name the process by which red ink moves in A and B.
- Which type of pressure forces the water molecules to move towards thistle funnels and cause a rise in the water level?
- Where does this process occur in plants and animals?
- What material could be used as a semi-permeable membrane?
Give Technical Term for the following.
A solution whose concentration is equal to the cell sap.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Cells that have lost their water content are said to be deplasmolysed.
Explain the Term: Endosmosis
The given statement is incorrect. Rewrite the correct statement:
Fresh water fish when placed in hypertonic salt solution absorb water and burst.
