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प्रश्न
Define the following term:
Active transport
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उत्तर
Active transport is the passage of a substance (salt or ion) from its lower to higher concentration through a living cell membrane using energy from the cell. Active transport is in a direction opposite to that of diffusion.
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संबंधित प्रश्न
Describe the role played by protein pumps during active transport in plants.
Active Transport and Diffusion [Significance in plants]
Lenticels or stomata (Which one remains open always?)
Name the plant tissue which helps in carrying the food to different parts of a plant.
Fill in the blank with the suitable term given below:
Transportation in plants is carried out by a __________ system.
Differentiate between the following
Active transport and Passive transport.
In a passive transport across a membrane, when two different molecules move in opposite direction and independent of each other, it is called as ______.
Explain the term Active transport.
Active transport is one in which the ions outside the roots move in by utilising ______.
Three cylinders of potato were carefully dried on blotting paper and weighed. Each piece weighed 3 grams. Each one was placed in the beaker as shown below:
Answer the following questions:
- After 48 hours, which potato cylinder would be the heaviest?
- The movement of which substance is mainly responsible for the weight change in the potato cylinders?
- Name and define the process which is responsible for the movement of the substance mentioned in answer (b).
- Write specific names of the processes which occur in beakers B and C. [kinds of processes defined in answer (c)].
- Would there be any difference in the weight of the potato cylinder in beaker A after 48 hours? Give reason.
