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Osmosis

Movement of w...

Question

Movement of water molecules along their concentration gradient through a selectively permeable membrane is known as

A

Plasmolysis

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B

Osmosis

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C

Hydrophosis

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D

Diffusion

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Solution

The correct option is B
Osmosis

Osmosis is the movement of water through a plasma (semi-permeable) membrane from a region of low solute concentration to a region of high concentration.

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Movement of water molecules along their concentration gradient through a selectively permeable membrane is known as _______.

Q. Which of the following match is incorrect?
(i) Diffusion - Movement of substances from higher concentration to lower concentration
(ii) Osmosis - Occurs in only one direction
(iii) Semi-permeable membrane - Prevents passage of solute molecules
(iv) Endosmosis - Withdrawal of water from the vacuole
(v) Plasmolysis - Shrinkage of protoplasm when kept in hypotonic solution

Q. Assertion :Osmosis is a special type of diffusion of water through a semi-permeable membrane. Reason: The net direction and rate of osmosis depends only on the pressure gradient.

Q. Question 6
Following are a few definitions of osmosis. Read carefully and select the correct definition:

(a) Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane
(b) Movement of solvent molecules from its higher concentration to lower concentration
(c) Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane
(d) Movement of solute molecules from lower concentration to higher concentration of solution through a semipermeable membrane

Q. Which of the following statement(s) is/are true/false?

A. The positive hydrostatic pressure is called pressure.
B. Wall pressure exerts to prevent the increase of protoplasm size.
C. Diffusion is more rapid in liquids than in gases.
D. Diffusion of water through a semi-permeable membrane is called imbibition.
E. Osmosis is movement of substances, which takes place along a diffusion gradient.

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