In the years since the proposal of the fluid mosaic model of the cell membrane,
ID: 151696 • Letter: I
Question
In the years since the proposal of the fluid mosaic model of the cell membrane, which of the following observations has been added to the model? The membrane is only fluid across a very narrow temperature range. Movement of membrane components is more limited than that predicted by simple diffusion Unsaturated lipids are excluded from the membranes. The membrane contains regions with specialized lipid and protein content distinct from the surrounding membrane. Membrane proteins are known to be made of only acidic amino acids. A B and D are correct B and D are correctExplanation / Answer
ANSWER
THE MEMBRANE CONTAIN REGIONS WITH SPECILISED LIPIDS AND PROTEIN CONTENT DISTINCT FROM THE SURROUNDING MEMBRANE.
EXPLINATIONS
plasma membrane that contain high concentrations of cholesterol and glycosphingolipids which form subdomains known as Lipid rafts. rafts have a distinctive lipid and protein composition and all lipid rafts do not seems to be identical (either the proteins or the lipids that they contain). Diverse proteins, especially those involved in cell signaling, have been seen in lipid rafts. due to these properties, lipid rafts are thought to play a key role in regulation of signal transduction.