Question

Which is not an artificial semipermeable membrane?
A) Butter paper
B) Cell-wall
C) Parchment paper
D)$$C{U}_2[Fe(CN{)}_6]$$

Answer 1

Hint: We all know that semipermeable membranes are biological or synthetic polymeric membranes that allow certain molecules or ions to move through them through osmosis or other specialised processes such as facilitated diffusion, passive transport, or active transport.

Complete answer:
We must understand that artificial semipermeable membranes are made of a variety of materials engineered for filtration, such as those used in reverse osmosis, which enable only water to pass through. Here, we want to find the non-artificial semipermeable membrane.

A) Butter paper: Butter paper is coated with wax such as soybean or paraffin and it is used in cooking. So it can act as a semipermeable membrane and it is not naturally occurring so it is artificial hence not the correct answer.

B) Cell-wall: Animal cells have a natural semi-permeable membrane called the cell wall. The membrane of the cell is semipermeable or selectively permeable. It's made up of a phospholipid bilayer, as well as other lipids, proteins, and carbohydrates. Therefore, tiny molecules such as oxygen or carbon dioxide can quickly move across the cell membrane due to their special composition. This occurs naturally so it is the right answer.

C) Parchment paper: Parchment paper is a greaseproof paper that is used in cooking and it is coated with silicone to give it a nonstick, heat-resistant surface. Hence it is artificial and so it is not the correct answer.

D))$$C{U}_2[Fe(CN{)}_6]$$ : $$C{U}_2[Fe(CN{)}_6]$$, Cupric Ferrocyanide is a synthetic semipermeable membrane that dissolves in non-aqueous solutions and does not function in them. Cupric Ferrocyanide is not used for osmosis because it is soluble in non-aqueous liquids, despite the fact that it is semipermeable in nature, and osmosis cannot be done entirely or successfully.

Therefore the correct answer is option ‘B’.

Note: We should also remember that diffusion or the preferential passage of molecules through cells, causes certain molecules or ions to travel across the parchment paper. It controls the flow of water. Parchment paper serves as a semipermeable barrier. Semipermeable membranes are semipermeable or half-permeable membranes.