Question

Select the correct statement from the following regarding cell membrane.

• A. Na${}^{+}$ and K${}^{+}$ ions move across cell membrane by passive transport.
• B. Proteins make up 60 to 70% of the cell membrane.
• C. Lipids are arranged in a bilayer with polar heads towards the inner part.
• D. Fluid mosaic model of cell membrane was proposed by Singer and Nicolson.

Answer 1

The correct option is D Fluid mosaic model of cell membrane was proposed by Singer and Nicolson.

Singer and Nicolson gave the fluid mosaic model to explain the structure of cell membrane in 1972. According to this model, cell membranes are quasi-fluid with a viscous lipid bilayer having proteins distributed at places both on the surface and inside