Question

The latest model for plasma membrane is

• A. Lamellar model
• B. Unit membrane model
• C. Fluid mosaic model
• D. Molecular lipid model

Answer 1

Answer: (C)

Fluid mosaic model

• The latest model for plasma membrane is the fluid mosaic model.
  
• The fluid mosaic model of the biomembrane or cell membrane was proposed by SJ Singer and GL Nicolson in the year 1972.
  
• According to this model, the protein molecules are embedded in the lipid bilayer.
• Thus, the proteins are seen as icebergs in the sea of lipids.
• It is the most acceptable model of the plasma membrane and its main function is to provide shape to the cell.
• The lipid bilayer of the cell membrane provides fluidity, flexibility and elasticity to the membrane.
• So, the correct answer is 'Fluid mosaic model'.