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Question
Define the following term:
Tonicity
Solution
The relative concentration of the solutions that determines the direction and extent of diffusion is called tonicity.
RELATED QUESTIONS
Differentiate between Diffusion and Osmosis (Definition)
Define the following:
Osmosis
Name the following:
Two solutions having same concentrations.
Explain why:
The leaves of wilted lettuce, if kept in cold water, become crisp.
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.
The pressure which is responsible for the movement of water molecules across the cortical cells of the root.
Fill in the Blank
A plasmolysed cell has __________ protoplast.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Osmosis is defined as the movement of water from a concentrated sugar solution to a dilute sugar solution.
Multiple Choice Question:
In the process of osmosis in a cell:
