1. Fatty acids are. hydrocarbon tail is hydrophobic. compounds because the carboxyl group is hydrophilic and the 2. When an organism uses fatty acids, the ester linkages of triacylglycerols are hydrolyzed by enzymes called 3. When a base such as sodium hydroxide or potassium hydroxide is used, the products of the reaction, which is called. fatty acids. ,are glycerol and the sodium or potassium salts of the 4. It is possible for one of the alcohol groups of glycerol to be esterified by a phosphoric acid molecule rather than by a carboxylic acid. In such lipid molecules, two fatty acids are also esterifi ed to the glycerol molecule. The resulting compound is called a usually monoprotic acids with only one carboxyl group able to form an ester bond, but phosphoric acid is triprotic and thus can form more than one ester linkage. One molecule of phosphoric acid can form ester bonds both to glycerol and to some other alcohol, creating a phosphatidyl ester. - Fatty acids are 5. Phosphatidyl esters are lipids and belong to the class of. 6. are complex mixtures of esters of long-chain carboxylic acids and longchain alcohols. ,is produced by the Brazilian wax 7. Myricyl cerotate, the principal component of palm. 8. is a class of lipids which do not contain glycerol, but they do contain the long- chain amino alcohol sphingosine, from which this class of compounds takes its name 9. The simplest compounds of the lipid class in question number 8 are the ceramides, which consist of one fatty acid linked to the group of sphingosine by an amide bond. 10. In the primary alcohol group of sphingosine is esterified to phosphoric acid, which, in turn, is esterified to another amino alcohol, choline 11. If a carbohydrate is bound to an alcohol group of a lipid by a glycosidic linkage the resulting compound is a Quite frequently, ceramides are the parent compounds for this type of lipid, and the glycosidic bond is formed between the primary alcohol group of the ceramide and a sugar residue. 12. In cerebrosides, the sugar is often a glucose or galactose; for example, a cerebroside that contains glucose is a