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Read the given statements and select the correct ones.
(i) A membrane which permits the passage of pure solvent molecules to pass through it and not the solute particles is called semi-permeable.
(ii) A membrane which allows some substances to pass through it more readily than others is known as selectively/ differentially permeable.
(iii) All living biological membranes are perfectly semipermeable.
  • a)
    (i) and (ii)
  • b)
    (ii) and (iii)
  • c)
    (i) and (iii)
  • d)
    (i), (ii) and (iii)
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
Read the given statements and select the correct ones.(i) A membrane w...
There are certain membranes, which allow penetration of only solvent molecules but not the solute particles. Such membranes are known as semi-permeable. Examples of such membranes are cellophane, fish and animal bladders, egg membrane, plasma membrane, etc. The biological membranes are not perfectly semi-permeable. They allow to pass solute molecules only up to a certain extent and are, therefore, selective in nature. They are known as selectively or differentially permeable membranes. All living biological membranes are differentially permeable membranes, which allow some substances to pass through it more readily than others.
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Most Upvoted Answer
Read the given statements and select the correct ones.(i) A membrane w...
Statement Analysis:
The given statements are related to the concept of membrane permeability. We need to determine which statements are correct.

Explanation:
A membrane which permits the passage of pure solvent molecules to pass through it and not the solute particles is called semi-permeable. This statement is correct. A semi-permeable membrane allows the solvent molecules to pass through it while restricting the passage of solute particles.

A membrane which allows some substances to pass through it more readily than others is known as selectively/differentially permeable. This statement is also correct. Selectively permeable membranes have different levels of permeability for different substances, allowing some substances to pass through more easily than others.

However, the statement that all living biological membranes are perfectly semipermeable is incorrect. While living biological membranes, such as cell membranes, are selectively permeable, they are not perfectly semipermeable. They have specific transport proteins and channels that control the movement of substances in and out of the cell.

Conclusion:
From the given statements, statement (i) and statement (ii) are correct:

(i) A membrane which permits the passage of pure solvent molecules to pass through it and not the solute particles is called semi-permeable.
(ii) A membrane which allows some substances to pass through it more readily than others is known as selectively/differentially permeable.

Therefore, the correct answer is option (a) (i) and (ii).
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Read the given statements and select the correct ones.(i) A membrane which permits the passage of pure solvent molecules to pass through it and not the solute particles is called semi-permeable.(ii) A membrane which allows some substances to pass through it more readily than others is known as selectively/ differentially permeable.(iii) All living biological membranes are perfectly semipermeable.a)(i) and (ii)b)(ii) and (iii)c)(i) and (iii)d)(i), (ii) and (iii)Correct answer is option 'A'. Can you explain this answer?
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