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प्रश्न
Multiple Choice Question:
In the process of osmosis in a cell:
विकल्प
Both protoplasm and cell wall act as a membrane
Only cell wall acts as a membrane
Only outermost layer of protoplast acts as a membrane
The entire protoplast acts as a membrane
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उत्तर
The entire protoplast acts as a membrane
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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?
The space between the cell wall and plasma membrane in a plasmolysed cell is filled with ______.
What is responsible for guttation?
Two potato cubes each 1 cm3 in size, were placed separately in two containers (A&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 had somewhat decreased in size. Use the above information to answer the questions that follow:
Account for the firmness and increase in the size of the potato cubes placed in water.
Define the term:
Plasmolysis
Name the following:
The pressure with which the molecules of a substance diffuse.
Choose the correct answer:
Osmosis involves diffusion of ___________
Give a diagrammatic representation of plasmolysis in a cell.
Fill in the Blank
When there is no movement of water in the cell from the outside medium, the medium is considered to be ______ to cell sap.
Explain the Term: Exosmosis
