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प्रश्न
Define the following term:
Active transport
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
Name the following :
The wax-like layer on the epidermis of leaves which reduces transpiration.
Lenticels or stomata (Which one remains open always ?)
Fill in the blank with the suitable term given below:
Most water gets evaporated from the plant from its __________.
Fill in the blank with the suitable term given below:
The leaves have more__________ on their lower surface.
Active transport is one in which the ions outside the roots are ___________.
Active transport is in a direction ______ to that of diffusion.
Identify the CORRECT statement about the active absorption of water.
Identify the INCORRECT statement from the following.
Explain the term Active transport.
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.
