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प्रश्न
The diagram given below represents a plant cell after being placed in a strong sugar solution. Study the diagram and answer the questions that follow:
- What is the state of the cell shown in the diagram?
- Name the structure that acts as a selectively permeable membrane.
- Label the parts numbered 1 to 4 in the diagram.
- How can the above cell be brought back to its original condition? Mention the scientific term for the recovery of the cell.
- State any two features of the above plant cell which is not present in animal cells.
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उत्तर
- Plasmolysed cell
- Cell membrane acts as a selectively permeable membrane.
- 1 – Cell wall, 2 – Space filled with strong sugar solution, 3 – Plasma membrane, 4 – Nucleus
- If the cell is placed in a hypotonic sugar solution, the cell will be brought to its original condition. This is called deplasmolysis.
- Features present in the plant cell which are not present in the animal cell:
- Presence of cell wall.
- Ability to shrink the protoplasm and plasmolyse.
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संबंधित प्रश्न
The diagram below represents a process in plants. The setup was placed in bright sunlight. Answer the following questions:
a) Name the physiological process depicted in the diagram.
Why was oil added to the water?
b) When placed in bright sunlight for four hours, what do you observe with regard to the initial and final weight of the plant? Give a suitable reason for your answer
c) What happens to the level of water when this setup is placed in:
- Humid conditions?
- Windy conditions?
d) Mention any three adaptations found in plants to overcome the process mentioned in (i).
e) Explain the term ‘Guttation’.
Differentiate between the following:
Turgidity and Flaccidity
What is the difference between ‘flaccid’ and ‘turgid’? Give one example of flaccid condition in plants.
Give reason for the following:
It is better to transplant seedlings in a flower-bed in the evening and not in the morning.
A leaf cell of a water plant was placed in a liquid other than pond water. After sometime, it assumed a shape as shown below:
- Give the term for the state of the cell it has acquired.
- Name the structure which acts as a selectively permeable membrane.
- Comment on the nature (tonicity) of the liquid surrounding the cell.
- Name any one feature of this plant cell which is not present in an animal cell.
- Redraw in the space provided, the diagram of the cell if it is soon placed in ordinary water for some time.
Distinguish between the following:
Flaccid condition and turgid condition
Give Technical Term for the following.
A cell in a fully extended condition.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Flaccidity is the reverse of turgidity.
When the cells of a plant are fully distended, the condition is called ______.
Addition of salt to pickles is a method of killing the bacteria by ______.
