Lipids: Structure and Function

This lecture covers the complex organic molecules known as lipids, which are hydrophobic molecules with diverse structures. The main lipid groups discussed are triglycerides, phosphoglycerolipids, and steroids. Triglycerides consist of a glycerol backbone with three fatty acids attached, and the presence of double bonds affects their physical properties. Phosphoglycerolipids have hydrophobic and hydrophilic parts, forming the main component of biological membranes. Steroids, such as cholesterol, serve as signaling molecules and can modulate membrane fluidity. The distribution of lipids in the lipid bilayer is crucial for unique biological characteristics, and modifications like adding cholesterol can impact membrane fluidity and signaling pathways.