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प्रश्न
Explain why:
Bacteria and fungi do not grow in pickles, jams, jellies and squashes.
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उत्तर
Jam, jellies and pickles are kept in hypertonic solution of sugar or salt in which plasmolysis of bacteria and fungi takes place. This kills the bacteria and fungi and hence, pickles, jam and jellies are preserved properly.
संबंधित प्रश्न
The most appropriate characteristic of a semipermeable membrane is that
Define the following:
Osmosis
Distinguish between the following:
Plasmolysis and deplasmolysis
Name the following:
Condition of cell in which the cell contents are shrunken.
Name the following:
The process by which raisins swell up when placed in a beaker of water.
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:
Redraw in the space provided, the diagram of the cell if it is soon placed in ordinary water for some time.
Give Reasons for the following.
It is necessary to maintain a normal osmotic concentration of the blood.
Give Reasons for the following.
The raisins swell up in the water.
Multiple Choice Question:
Osmosis involves:
When a cell in solution shrinks and loses its shape, then the solution is ______.
