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Question
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?
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Solution
(i) Osmosis.
(ii) Osmotic pressure.
(iii) In plants, in the root cells and in animals in the RBC’s.
(iv) Cellophane paper or goat bladder, etc.
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RELATED QUESTIONS
Osmosis and diffusion are the same except that osmosis there is:
Name the following:
The condition of a cell placed in a hypotonic solution.
Differentiate between the following:
Plasmolysis and deplasmolysis
(a) Mention whether the following statement is true (True) or false (False)
(b) Correct the false statement by altering the last word only.
A plant cell placed in hypotonic solution gets Plasmolysed.
Distinguish between the following:
Turgor pressure and osmotic pressure
Choose the correct answer:
Plasmolysis will occur when the cell is placed in a __________
Give Reasons for the following.
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Give Technical Term for the following.
A solution whose concentration is equal to the cell sap.
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Osmosis
The given statement is incorrect. Rewrite the correct statement:
Fresh water fish when placed in hypertonic salt solution absorb water and burst.
