Question

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 (iii)
B. (ii) and (iii)
C. (i) and (ii)
D. (i), (ii) and (iii)

Answer 1

The transfer of water molecules from a higher water concentration area to a lower water concentration area over a semipermeable barrier is known as osmosis.It's the passage of water molecules over a semipermeable membrane, to put it another way. It's a one-of-a-kind water diffusion situation. For example, osmosis carries water from plant roots. The net movement of molecules of a material from a region of higher concentration to a region of lower concentration is known as diffusion. There are more molecules going in one direction than in the other direction, which is known as net movement.

Complete answer:
Option A: There are membranes that allow only solvent molecules to pass through but not solute particles. Semi-permeable membranes are those that are semi-permeable in nature. Cellophane, fish and mammal bladders, egg membranes, plasma membranes, and other membranes are examples. The semi-permeability of biological membranes is not perfect. They allow just a limited number of solute molecules to pass through and are so selective. Selectively or differentially permeable membranes are what they're called. Differentially permeable membranes are found in all living biological membranes, allowing some chemicals to pass through more easily than others.
So, option A is correct.
Option B: A selectively permeable membrane is one that is permeable to only particular molecules rather than all molecules. Supplement. The cell membrane is an example of such a membrane, which permits only specific types of molecules to flow through diffusion and rarely by facilitated diffusion.
So, option B is not correct.
Option C: When a substance may pass through a membrane by diffusion, it is said to be permeable. A differentially permeable membrane is one that only enables specific chemicals to pass through. A semipermeable membrane allows just the solvent and not the solute to pass through it.
So, option C is not correct.
Option D: Because it regulates the transport of molecules from inside to outside the cell, the plasma membrane is known as a selectively permeable membrane. This means that the plasma membrane permits some compounds to pass through while prohibiting others from doing so.
So, option D is not correct.

So, option A is the correct answer.

Note:
Importance of diffusion and osmosis-
Diffusion is a property of a number of systems that manage and provide critical substances to the body in order for basic existence for many species. A handful of these will be covered further down. One of these processes is gas exchange.
It occurs when the body obtains much-needed oxygen in order for respiration to occur and waste to be removed from the body. The exchange occurs in the lungs of mammals, which contain many alveoli.
The purpose of osmosis is to maintain a balance between the interior and outside environments.
For example, osmosis of water from the soil to the root hairs of the plant. Because the soil has a higher concentration of water, it travels from the soil to a low-concentration area (ie. Plant).