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Why is the plasma membrane called select...

Why is the plasma membrane called selectively permeable membrane ?

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Plasma membrane is a lipoproteinous and trilaminar membrane. It regulates the exchange of materials between the cystosol and extra-cellular medium. Give the reasons for the following: ( C ) Why the plasma membrane is said a selectively permeable membrane?

Why is plasma membrane called a semipermeable membrane? Give its significance.

Why is plasma membrane called quasi-fluid membrane?

What is a semi-permeable membrane ?

MODERN PUBLICATION-CELL : THE UNIT OF LIFE-EXERCISE
  1. Why is plasma membrane called quasi-fluid membrane?

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  2. Which two types of proteins are present in plasma membrane?

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  3. Why is the plasma membrane called selectively permeable membrane ?

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  4. Name two types of processes involved in transport of materials across ...

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  5. Why is plasma membrane called a selectively permeable membrane?

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  6. Name various physical processes involved in tranport of materials.

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  7. Name various active processes involved in transport of materials.

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  8. Define diffusion. Give one example of it in a living system.

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  9. What is osmosis.? Name one experiment by which it can be demonstrated.

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  10. How is facilitated diffusion different from diffusion?

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  11. Give one major difference between active processes and passive process...

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  12. What is endocytosis? Name two processes of endocytosis.

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  13. Differentiate Pinocytosis and phagocytosis.

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  14. Define exocytosis. Give one example of it.

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  15. Give the occurrence of cell wall.

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  16. List one major difference between primary cell wall and secondary cell...

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  17. What is suberinization? Give its siginificane.

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  18. What is middle lamella?

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  19. Give the period of formation of new cell wall.

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  20. Name the major chemical compounds present in the cell wall.

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