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प्रश्न
When a cell in solution shrinks and loses its shape, then the solution is ______.
पर्याय
Isotonic
Potable water
Hypotonic
Hypertonic
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उत्तर
When a cell in solution shrinks and loses its shape, then the solution is hypertonic.
Explanation:
The solute concentration in a hypertonic solution exceeds that of cell sap. A cell kept in such a solution shrinks and loses water that moves out of it.
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संबंधित प्रश्न
A candidate in order to study the process of osmosis has taken 3 potato cubes and put them in 3 different beakers containing 3 different solutions. After 24 hours, in the first beaker the potato cube increased in size, in the second beaker the potato cube decreased in size and in the third beaker there was no change in the size of the potato cube. The following diagram shows the result of the same experiment:
(i) Give the technical terms of the solutions used in beakers, 1, 2 and 3.
(ii) In beaker 3, the size of the potato cube remains the same. Explain the reason in brief.
(iii) Write the specific feature of the cell sap of root hairs which helps in absorption of water.
(iv) What is osmosis?
(v) How does a cell wall and a cell membrane differ in their permeability?
Give the appropriate biological or technical term for the following.
Movement of molecules of a substance from their higher concentration to lower concentration when they are in direct contact.
Leaves of the sensitive plant wilt and droop down on a slight touch. What mechanism brings about this change?
Distinguish between the following:
Plasmolysis and deplasmolysis
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A and B), the container A having water and the other (B) containing concentrated sugar solution. After 24 hours when the cubes were examined, those placed in water were found to be firm and had increased slightly in size and those placed in concentrated sugar solution were found to be soft and somewhat decreased in size. Use the above information to answer the questions that follow:
Account for the softness and decrease in size of the potato cubes which were placed in sugar solution.
Differentiate between:
Osmosis and Diffusion
Give Technical Term for the following.
The pressure which is responsible for the movement of water molecules across the cortical cells of the root.
Name the following:
Name the process by which water enters the root hair cell.
Multiple Choice Question:
Osmosis involves:
Multiple Choice Question:
When a plant wilts, the sequence of events will be as follows:
