Question

Fluid mosaic model was given by
A. S.J. Singer and G.L. Nicolson
B. S.S. Singer and G.L. Nicolson
C. S.J. Singer and H.L. Nicolson
D. S.S. Singer and J.L Nicolson

Answer 1

Hint: The plasma membrane structure is described by the fluid mosaic model. In this model, protein molecules are embedded in between the phospholipid molecules. Phospholipids form a lipid bilayer cell membrane that separates fluid within the cell from fluid outside of the cell. Proteins are the second major component of the plasma membrane. The third major component of the plasma membrane is carbohydrates.

Complete answer:
The fluid mosaic model was proposed by Seymour Jonathan Singer and Garth L. Nicolson.
The fluid mosaic model is the model of biomolecules or cell membranes.
According to the fluid mosaic model, the molecules of proteins are embedded in the lipid bilayer. The proteins look like icebergs in the sea of lipids.
The fluid mosaic model is the most accepted model of the plasma membrane.
The main function of this model is to give shape to the cell and to separate the components of the cell from the outside.
The present model explains features relevant to various cellular processes such as cell-cell signaling, cell division, cell fusion, apoptosis, and membrane budding.
The lipid bilayer of the cell membrane provides elasticity, flexibility, and fluidity to the membrane.
So, the correct answer is “Option A”.

Additional Information:
This model was named 'Fluid mosaic model' as the cell membrane formed by phospholipids are the fluid substances, so the membrane is also considered as the fluid-structure.
Protein molecules are embedded in between the molecules of these two lipid layers.
Phospholipid bilayer permits the uncharged small substances like oxygen, carbon dioxide, and hydrophobic molecules such as lipids to move through the cell membrane by simple diffusion.

Note:
The fluid mosaic model describes the plasma membrane structure as a mosaic of components including phospholipids, proteins, carbohydrates, and cholesterol that gives fluid character to a membrane. One layer of proteins is embedded between the two layers of lipids. The thickness of the plasma membrane varies from 5 to 10 nanometer. Cholesterol helps in making the membrane more fluid and flexible. Proteins help in cell recognition and diffusion.