Advertisements
Advertisements
प्रश्न
What is the water potential?
उत्तर
Water potential is a measure of potential energy of water or the difference in potential energy between a given water sample and pure water.
संबंधित प्रश्न
Differentiate between Turgor pressure and Wall pressure (explain)
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?
The highest water potential (capacity to move out higher concentrated solution) is that of ______.
Name the following:
The condition of a cell placed in a hypotonic solution.
Mention whether the following statement is true or false. Correct the false statement by altering the last word only.
The shrinkage of protoplasm, when a cell is kept in hypotonic solution.
Name the following:
Condition of cell in which the cell contents are shrunken.
Name the following:
The inward movement of solvent molecules through the plasma membrane of the cell.
Name the following:
The process by which raisins swell up when placed in a beaker of water.
Choose the correct answer:
Grapes when placed in a strong sugar solution shrink because of __________
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Plasmolysis is reverse of deplasmolysis.
Give Reasons for the following.
Salt and sugar are used in preserving food.
Give Reasons for the following.
Drops of water on a leaf of plant like peepal does not enter the leaf by osmosis?
In the figure below ‘A’ shows a cell in the normal state and ‘B’ shows the same cell after leaving it in a certain solution for a few minutes.
(i) Describe the change which has occurred in the cell as seen in B.
(ii) Give the technical term for the condition of the cell as reached in B and as it was in A.
(iii) Define the process which led to this condition.
(iv) What was the solution-isotonic, hypotonic or hypertonic, in which the cell was kept?
(v) How can the cell in B, be brought back to its original condition?
(vi) Name the parts numbered 1 to 3.
Give Technical Term for the following.
The condition in which the water from a cell is completely removed due to exosmosis and no more shrinkage is possible.
Name the following:
The pressure through which water can rise upto some feet.
Name the following:
The process by which raisins swell up when placed in a beaker of water.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Plasmolysis makes the cell turgid.
Multiple Choice Question:
Osmosis involves:
Multiple Choice Question:
Plasma membrane controls:
Explain the Term: Osmosis
