membrane structure: fluid mosaic model Flashcards
What is the fluid mosaic model of membrane structure?
The fluid mosaic model describes the structure of biological membranes as a phospholipid bilayer with proteins embedded in various positions. The model is widely supported by evidence and suggests that the membrane is dynamic and flexible.
What are the two types of proteins found in the membrane, according to the fluid mosaic model?
The two types of proteins are:
- Peripheral proteins: These are attached to the inner or outer surface of the membrane.
- Integral proteins: These are embedded within the phospholipid bilayer, with some parts protruding on either side of the membrane.
How are the proteins in the membrane arranged, according to the fluid mosaic model?
The proteins in the membrane are likened to tiles in a mosaic, scattered across the phospholipid bilayer, creating a patchwork of proteins within the membrane structure.
Why is the membrane described as fluid in the fluid mosaic model?
The membrane is described as fluid because the phospholipids in the bilayer are free to move laterally (side to side), allowing the embedded proteins to also move within the membrane, contributing to its flexibility and fluidity.
