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प्रश्न
Addition of salt to pickles is a method of killing the bacteria by ______.
विकल्प
Imbibition
Diffusion
Deplasmolysis
Plasmolysis
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उत्तर
Addition of salt to pickles is a method of killing the bacteria by plasmolysis.
Explanation:
Salt added to the pickle raises the solute concentration outside of the bacterial cells. As a result, water moves outside of the cell and kills the bacteria.
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’.
Give reason for the following:
A plant cell, when kept in a hypertonic salt solution for about 30 minutes, turns flaccid.
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.
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.
Differentiate between the following:
Plasmolysis and Deplasmolysis.
Give Technical Term for the following.
A cell in a fully extended condition.
Give Technical Term for the following.
The pressure exerted by cell contents on a plant cell wall.
Name the following:
The process by which wilting or drooping of leaves occurs.
Deplasmolysis occurs when a plasmolysed cell is placed in ______.
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:
- In the figure, 1, 2 and 3 represent:
- Cytoplasm, Nucleus, Vacuole respectively
- Vacuole, Cytoplasm, Cell wall respectively.
- Cytoplasm, Cell membrane and vacuole respectively.
- Cytoplasm, Cell wall and Vacuole respectively.
- B in the figure represents:
- Osmotic pressure
- Turgor pressure
- Wall pressure
- Diffusion pressure
- A in the figure represents:
- irnbibition pressure
- Wall pressure
- Turgor pressure
- Osmotic pressure
- C in the figure represents:
- Turgor pressure
- Osmotic pressure
- Wall pressure
- Imbibition pressure
- Draw a neat and labelled diagram of a plasmolyzed plant cell.
