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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.
संबंधित प्रश्न
State the main function of the Guard cells
Fill in the blank with the suitable term given below:
The upward movement of sap that contains water and minerals is called _______ of sap.
Fill in the blank with the suitable term given below:
The leaves have more__________ on their lower surface.
How water absorbed by the roots is important for the plants?
Which experiment demonstrates the transport of food material in plants by phloem?
Differentiate between the following
Active transport and Passive transport.
Which of the following process requires energy?
Identify the CORRECT statement about the active absorption of water.
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.
