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प्रश्न
Explain the term:
Plasmolysis
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उत्तर
- When a living cell is placed in a hypertonic solution, exo-osmosis occurs. This is called plasmolysis.
- During plasmolysis, the protoplast of the cell shrinks and recedes from the cell wall, causing the cell to become flaccid. Such a cell is called a plasmolysed cell.
- In a plasmolyzed cell, a gap is developed between the cell wall and the protoplast. This gap is filled by the outer solution.
संबंधित प्रश्न
(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.
The diagram given below represents an experimental set-up to demonstrate a certain process. Study the same and answer the questions that follow:
- Name the process.
- Define the above-named process.
- What would you observe in the experimental set-up after an hour or so?
- What control experiment can be set up for comparison?
- Keeping in mind the root hair, cell and its surroundings, name the parts that correspond to
- concentrated sugar solution
- parchment paper
- water in the beaker
- Name any other material that can be used instead of parchment paper in the above experiment.
- Mention two advantages of the process for the plants.
Show by a series of diagrams, the change which a plant cell will undergo when placed in
Hypotonic salt solution
Define the following:
Osmosis
Define the following:
Hypertonic solution
Distinguish between the following:
Hypotonic and Hypertonic solutions
Name the following:
Condition of cell in which the cell contents are shrunken.
Name the following:
Movement of molecules from a region of high concentration to a region of low concentration.
Explain why:
The leaves of wilted lettuce, if kept in cold water, become crisp.
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Plasmolysis is reverse of deplasmolysis.
Give Reasons for the following.
Drops of water on a leaf of plant like peepal does not enter the leaf by osmosis?
Differentiate between:
Osmosis and Diffusion
Give Technical Term for the following.
Solutions which have the same osmotic pressure.
Give Technical Term for the following.
The pressure which is responsible for the movement of water molecules across the cortical cells of the root.
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.
Fill in the Blanks
Osmosis in the diffusion of _______ molecules from the region of higher _____ potential to that of lower potential across a S.P.M.
Multiple Choice Question:
Plasma membrane controls:
Explain the Term:
Osmosis
