Advertisements
Advertisements
प्रश्न
Mention whether the following statement is true (T) or false (F) and give explanation in support of your answer.
Plasmolysis is reverse of deplasmolysis.
पर्याय
True
False
Advertisements
उत्तर
True.
Plasmolysis occurs due to outflow of water from the cell when placed in hypertonic solution due to which the cytoplasm shrinks away from the cell wall. On the other hand, deplasmolysis is the result of the re-entry of water into the plasmolysed cell when placed in hypotonic solution due to which the protoplasm again swells up pressing tight against the cell wall.
संबंधित प्रश्न
When placed in a more concentrated solution, the cell contents will ______.
Explain how soaked seeds swell up and burst their seed coats.
Name the following:
Movement of molecules from a region of high concentration to a region of low concentration.
Give Reasons for the following.
Plants begin to die when the excess of soluble fertilizers are added to the soil?
Given below is the figure of an experimental set up to demonstrate root pressure.
(i) Define root pressure.
(ii) What change would you observe in the water level after some time?
(iii) What role is being played by the root pressure in the given experiment?
(iv) Why the oil has been sprinkled on water?
The diagram below represents an experimental set up to demonstrate a vital process. Study the same and then answer the questions that follow:
(i) Name the process.
(ii) Define the above named process.
(iii) What would you observe in the experimental setup after an hour or so?
(iv) What control experiment can be set up for the above experiment?
(v) Keeping in mind the root hair cell and its surrounding name the part that corresponds to (1) Concentrated sugar solution, (2) Parchment paper, (3) Water in the beaker.
(vi) Name any other substance that can be used instead of parchment paper in the above experiment.
(vii) Mention two advantages of this process to the plant.
Fill in the Blank
A plasmolysed cell has __________ protoplast.
Multiple Choice Question:
In the process of osmosis in a cell:
Multiple Choice Question:
Plasma membrane controls:
Name the two organelles in a plant cell that contain their own genetic material and ribosomes.
