Question

Plasma membrane is asymmetrical structure because:

• A. Protein presents on outer surface and lipids is present only in inner surface
• B. Carbohydrate is present on outer surface and cholestrol present in inner surface
• C. Carbohydrate is present in outer surface and spectrin is present in only inner surface
• D. Protein are arranged in phospholipid layer as mosaic pattern.

Answer 1

The correct option is D Protein are arranged in phospholipid layer as mosaic pattern.

The fluid mosaic model explains various observations regarding the structure of functional cell membranes. According to this biological model, there is a lipid bilayer in which protein molecules are embedded in a mosaic pattern. The lipid bilayer gives fluidity and elasticity to the membrane. It makes plasma membrane structurally asymmetrical.

So the correct answer is option D.