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Question
What is the difference between ‘flaccid’ and ‘turgid’? Give one example of flaccid condition in plants.
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Solution
The cell is said to be turgid when the plant cell wall becomes rigid and stretched by an increase in the volume of vacuoles due to the absorption of water when placed in hypotonic solution. On the other hand, the cell is said to be flaccid when the cell contents get shrunken when the cell is placed in hypertonic solution and the cell is no more tight. Flaccidity is the reverse of turgidity. Example: Weeds can be killed in a playground by sprinkling excessive salts around their base.
Or
A plant cell when immersed in hypertonic solution like salt solution for about 30 minutes will become flaccid or limp.
RELATED QUESTIONS
A plant cell may burst when :
Fig. represents aprocess in plants. The set up was placed in bright sunlight. Answer the following questions:
-
- Name the physiological process depicted in the figure.
- Why was oil added to the water?
- 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.
- What happens to the level of water when this setup is placed in:
- Humid conditions?
- Windy conditions?
- Mention any three adaptations found in plants to overcome the process mentioned in (a).
- Explain the term ‘Guttation’.
Give the equivalent term for the following:
The condition in which the cell contents are shrunken.
Give the equivalent terms for the following:
Loss of water through a cut stem.
Give reasons for the following:
If you sprinkle some common salt on grass growing on a lawn, it is killed at that spot.
Give reason for the following:
A plant cell, when kept in a hypertonic salt solution for about 30 minutes, turns flaccid.
Differentiate between the following
Turgor pressure and Root pressure
The below diagram represents a plant cell after being placed in a strong sugar solution. Guidelines 1 to 5 indicate the following:
1. Cell wall
2. Plasma membrane.
3. Protoplasm
4. Large vacuole
5. Nucleus
Study the diagram and answer the questions that follow :
(i) What is the state of the cell shown in the diagram?
(ii) Name the structure which acts as a selectively permeable membrane.
(iii) If the cell had been placed in distilled water instead of a strong sugar solution which features: would not have been present?
(iv) If the cell in the diagram possessed chloroplasts where would these be present?
(v) Name any one feature of this plant cell which is not present in animal cells.
Multiple Choice Question:
When cell is fully turgid, which of the following will be zero?
When the cells of a plant are fully distended, the condition is called ______.
