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Explain Turgor Pressure

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Question

Explain Turgor pressure

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Solution

Turgor pressure:
In a turgid plant cell, the pressure of the cell contents on the cell wall is called the turgor pressure.  

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2014-2015 (March) Science Paper 3

RELATED QUESTIONS

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: 

  1. What is the state of the cell shown in the diagram?
  2. Name the structure that acts as a selectively permeable membrane.
  3. Label the parts numbered 1 to 4 in the diagram.
  4. How can the above cell be brought back to its original condition? Mention the scientific term for the recovery of the cell.
  5. State any two features of the above plant cell which is not present in animal cells.

Fig. represents aprocess in plants. The set up was placed in bright sunlight. Answer the following questions:

    1. Name the physiological process depicted in the figure.
    2. Why was oil added to the water?
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  2. What happens to the level of water when this setup is placed in:
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    2. Windy conditions?
  3. Mention any three adaptations found in plants to overcome the process mentioned in (a).
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Give the equivalent term 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.


 Give suitable biological reasons for the following statement: 
Root hairs become flaccid and droop when excess fertilizers are added to the moist soil around them. 


Name the following:

The process by which wilting or drooping of leaves occurs.


Fill in the Blank
Wilting and drooping of leaves is due to loss of ________.


Give the equivalent term for the following:

Pressure exerted by the cell contents on the cell wall.


Given below is the figure of a plant cell showing different kinds of pressure acting upon it. Study the figure and answer the questions that follow:

  1. In the figure, 1, 2 and 3 represent:
    1. Cytoplasm, Nucleus, Vacuole respectively
    2. Vacuole, Cytoplasm, Cell wall respectively.
    3. Cytoplasm, Cell membrane and vacuole respectively.
    4. Cytoplasm, Cell wall and Vacuole respectively.
  2. B in the figure represents:
    1. Osmotic pressure
    2. Turgor pressure
    3. Wall pressure
    4. Diffusion pressure
  3. A in the figure represents:
    1. irnbibition pressure
    2. Wall pressure
    3. Turgor pressure
    4. Osmotic pressure
  4. C in the figure represents:
    1. Turgor pressure
    2. Osmotic pressure
    3. Wall pressure
    4. Imbibition pressure
  5. Draw a neat and labelled diagram of a plasmolyzed plant cell.

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