Question

In fluid mosaic model of plasma membrane

• A. Upper layer is non-polar and hydrophilic
• B. Polar layer is hydrophobic
• C. Phospholipids form a bimolecular layer in middle part
• D. Proteins form a middle layer

Answer 1

Answer: (C)

Phospholipids form a bimolecular layer in middle part

Answer 2

The correct option is (C) : Phospholipids form a bimolecular layer in middle part

Singer and Nicolson suggested a concept of the plasma membrane as a fluid mosaic. This hypothesis proposes that the plasma membrane is a bilayer of phospholipids that contains proteins, cholesterol, and carbohydrates, giving it a mosaic-like look. The hydrophilic and polar heads of the lipid molecules are placed on the outside of the phospholipid bilayer, while the hydrophobic and non-polar tails are positioned on the inside.