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प्रश्न
Distinguish between the following:
Hypotonic and Hypertonic solutions
उत्तर
| Hypotonic solutions | Hypertonic solutions |
| In this condition , the solution outside the cell has lower solute concentration than the cell sap. | In this condition , the solution outside the cell has higher solute concentration than the cells sap. |
| The water molecules from outside will move into the cell (endosmosis). | The water molecules from the interior of the cell will move out (exosmosis) excessive root pressure. |
संबंधित प्रश्न
Explain how soaked seeds swell up and burst their seed coats.
Choose the correct answer:
Osmosis involves diffusion of ___________
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:
Comment on the nature (tonicity) of the liquid surrounding the cell.
The apparatus arranged here signifies an important process.
(i) Name the process.
(ii) Where does this process occur in plants?
(iii) What solution is placed inside the dialysis tubing?
(iv) What happens to the level of the solution in the capillary tube?
(v) Define the process mentioned in Q. (i) above.
In an experiment, two sets of apparatus were set up as shown below:
In A there is a concentrated sugar solution inside the thistle funnel and red ink in the water outside the funnel. In B there is a concentrated glucose solution with red ink inside the thistle funnel and water outside the thistle funnel.
In both A and B the level of liquid inside the funnels rises up the tubes. In A the sugar solution turns red and in B, the water turns red.
Study the given observations and answer these questions:
- Name the process by which red ink moves in A and B.
- Which type of pressure forces the water molecules to move towards thistle funnels and cause a rise in the water level?
- Where does this process occur in plants and animals?
- What material could be used as a semi-permeable membrane?
Give Technical Term for the following.
A solution whose concentration is greater than that of the cell sap.
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:
The process by which raisins swell up when placed in a beaker of water.
Name the following:
Condition of cell in which the cell content are shrunken.
DPD of a cell can be expressed as ______
