two

__ ipids- __ broad class of miomolecules. __ fat- __ any biomolecule formed from the reaction between a glycerol molecule.
 * 13.3 Lipids Are Insoluble in Water**

// Two important types of lipids: fats and steroids. // A fatty acid is a long-chain hydrocarbon termination in a carboxylic acid group. The chain is typically between 12 and 18 carbon atoms long and may be either saturated or unsaturated. A saturated chain contains no carbon-carbon double bonds, and unsaturated chain contains one, two, or three carbon-double bonds. Since fats are made from three faty acids and glycerol, they are commonly referred to as triglycerides. two The walrus and other polar species are insulted from the cold by a thick layer of fat beneath their skin. //Saturated// Coconut || **Steroids** Chikesterol Testosterone //Estradiol// //Unsaturated// Olive ||
 * __LIPIDS__
 * Fats**