What does the fluid mosaic model describe?

The fluid mosaic model describes the structure of the phospholipid bilayer that makes up cellular membranes. This model illustrates how the bilayer is composed of phospholipids that are not fixed in place but rather move fluidly within the layer, creating a dynamic and flexible structure. The term "mosaic" refers to the various proteins, cholesterol, and other molecules that are embedded within or associated with the phospholipid bilayer, contributing to the membrane's diversity and functionality. These proteins can float or move laterally among the phospholipids, which is essential for many cell processes, including communication, transport, and signaling. Understanding the fluid mosaic model is crucial for comprehending how membranes operate and how they facilitate various biological functions.