11. Which of the following terms best describes the compound below? CH_(3)(CH_(2))_(7)CH=CH(CH_(2))_(7)CO_(2)H A. An unsaturated fatty acid B. A triglyceride C. A synthetic detergent D. A micelle E. A glycerol 12. __ and __ are two polysaccharides that common glycosidic linkage types A. Cellulose and amylopectin B. Amylose and glycogen C. Amylose and cellulose D. Glycogen and amylopectin E. Dextrin and chitin 13. In mammals, the major fat in adipose tissues is __ A. Phospholipid B. Cholesterol C. Sphingolipids D. Triacylglycerol E. Phosphoinositols 14. Two sugars which differ from one another only in configuration around a single carbon atom are termed __ A. Epimers B. Anomers C. Optical isomers D. Stereoisomers E. Enantiomers 15. The carbohydrate of the blood group substances is __ A. Sucrose B. Fucose C. Arabinose D. Maltose E. Galactose 16. __ and __ are the repeating units of hyaluronic acid A. N-acetyl glucosamine and D-glucuronic acid B. N-acetyl galactosamine and D -glucuronic acid

11. The compound $CH_{3}(CH_{2})_{7}CH=CH(CH_{2})_{7}CO_{2}H$ is an unsaturated fatty acid because it contains a carbon-carbon double bond (C=C) in its structure. The presence of the double bond indicates that it is an unsaturated compound. Therefore, the correct answer is A. An unsaturated fatty acid.<br /><br />12. Cellulose and amylopectin are two polysaccharides that have common glycosidic linkage types. Cellulose has β(1→4) glycosidic linkages, while amylopectin has α(1→4) glycosidic linkages. Therefore, the correct answer is A. Cellulose and amylopectin.<br /><br />13. In mammals, the major fat stored in adipose tissues is triacylglycerol. Triacylglycerol is a type of lipid molecule that consists of three fatty acid chains attached to a glycerol backbone. It is the primary form of stored energy in adipose tissues. Therefore, the correct answer is D. Triacylglycerol.<br /><br />14. Two sugars that differ from one another only in configuration around a single carbon atom are termed epimers. Epimers are a type of stereoisomer where the difference in configuration occurs at only one specific carbon atom. Therefore, the correct answer is A. Epimers.<br /><br />15. The carbohydrate of the blood group substances is fucose. Fucose is a monosaccharide sugar that is present in the glycoproteins and glycolipids of the cell surface, playing a crucial role in cell-cell recognition and interaction. Therefore, the correct answer is B. Fucose.<br /><br />16. The repeating units of hyaluronic acid are N-acetyl glucosamine and D-glucuronic acid. Hyaluronic acid is a glycosaminoglycan composed of alternating units of N-acetyl glucosamine and D-glucuronic acid. Therefore, the correct answer is A. N-acetyl glucosamine and D-glucuronic acid.