Question

Singer and Nicholson's model of plasma membrane differs from Robertson's model in the

• A. Number of lipid layers
• B. Arrangement of lipid layers
• C. Arrangement of proteins
• D. Absence of protein in Singer and Nicholson's model

Answer 1

The correct option is C Arrangement of proteins

Robertson proposed a trilaminar structure for plasma membrane which comprised of an electron transparent lipid bilayer sandwiched between electron dense protein layers. Singer and Nicolson proposed a fluid mosaic model in which the proteins are interspersed and floating like the mosaic in a lipid bilayer. Some proteins called integral proteins traverse through the entire width of the membrane while some proteins called surface proteins are present on the surface only.

So, the correct answer is option C.