Which cell theory proved that the quasi-fluid nature of lipid enables lateral movement of proteins within the overall bilayer?

Fluid mosaic model

The correct answer is Option (2)- Fluid mosaic model

The concept that proved the quasi-fluid nature of lipids, enabling lateral movement of proteins within the overall bilayer, is described by the Fluid Mosaic Model.

Fluid Mosaic Model:

• The Fluid Mosaic Model is a model of the structure of biological membranes, proposed by J. Singer and G. Nicolson in 1972.
• It describes the cell membrane as a dynamic and flexible structure where lipids and proteins are not fixed in place but rather have a "fluid" nature, allowing for lateral movement within the lipid bilayer.
• According to this model, the lipid bilayer behaves like a fluid, with lipids and proteins able to move laterally, giving rise to the term "mosaic."
• The fluidity of the lipid bilayer is attributed to the quasi-fluid nature of lipids, especially phospholipids, which make up the majority of the cell membrane.

The Fluid Mosaic Model has become a fundamental concept in understanding the structure and dynamics of biological membranes. It provides insights into how proteins and lipids interact and move within the membrane, influencing various cellular processes.