Any biological molecule that has low solubility in water and high solubility in non polar organic solvents. Six major groups: fatty acids, triacylglycerols, phospholipids, glycolipids, steroids, and terpenes.
Building blocks for most lipids. They usually have an even number of carbons, and humans have a maximum of 24. They can be saturated or unsaturated.
Fats and Oils are constructed from a 3 carbon backbone called glycerol, which is attached to 3 fatty acids. Their fcn is to store energy, thermal insulation, and padding to an organism.
TRICLYGLYCEROLS OR TRIGLYCERIDES
Built from glycerol backbones but a polar phosphate group replaces one of the fatty acids. One end is polar and the fatty acid side is non polar, this is called amphipathic. Which is well suited for membranes.
Similar to Trigylcerides except that they have one or more carbohydrates attached to the 3-carbon glycerol backbone instead of a phosphate group. Also amphipathic and found in membranes of myelinated cells of human nerves.
Are a 4-ringed structure. They include some hormones of Vitamin D and Cholesterol, an important membrane component.