Question

The singer’s Model of plasma membrane differs from the Robertson’s model in which of the following arrangements?
(A) Number of lipid layers
(B) Arrangement of proteins
(C) Arrangement of lipid layers
(D) Absence of protein layers

Answer 1

Hint: Plasma membrane is the semitransparent membrane that encloses the cytoplasm and the nucleus. This help to protect the cell organelles and the cell from the external environment. This membrane is made up of the glycerol and the phospholipids.

Complete answer:

Characteristics	Singer’s model	Robertson’s model
Nature of plasma membrane	The scientist singer and the Nicolson gave the fluid mosaic model of the plasma membrane.	Robertson proposed that the plasma membrane is in the three laminar structure.
Arrangement of lipid bilayer	They said that proteins are not present as the layer, they are interspersed in the lipid bilayer.	He said that the protein layer is with the dense electrons. Between these layers, the electron transparent lipid bilayer is also present.
Nature of proteins	The protein is floating like the mosaic in the lipid bilayer	The protein is present as the electron rich layer

Hence, the correct answer is option (B)

Note: Phospholipids form the lipids bilayer when they contact the water or the proteins. The surface of the lipid is divided into the bilayer, where the hydrophobic areas are located inside and the hydrophilic areas are located outside the surface of the membrane. Hence the singer’s model of plasma membrane differs from the Robertson model by the arrangement of the proteins.