The three major types of substances from which we obtain energy are from which a. amino acids, proteins, and carbohydrates b. burgers, pizza, and soft drinks c. carbohydrates, fats, and proteins d. proteins, nucleic acids, and oils Which of the following polysaccharide molecules consists of branched chains of glucose units? a. amylose and amylopectin b. amylose and cellulose c. amylose and glycogen d. amylopectin and glycogen Lipids are defined by their a. chemical reactivity b. functional group c. function in the body d. solubility properties The iodine number of fat or oil expresses its a. calories per gram b. degree of acidity c. degree of unsaturation d. digestibility Proteins are polymers of a. amino acids b. fatty acids c. monoacylglycerides d. monosaccharides A possible base pair in DNA is a. A-G b. A-T c. A-U d. T-G Nucleic acid base pair are joined by a. amide bonds b. ester bonds c. glocosidic bonds d. hydrogen bond An essential amino acid is one that a. has more calories than other amino acids b. is needed in greater quantities than some others c. is synthesized in the body d. must be included in the diet In shape, trans fatty acid molecules resemble a. cholesterol b. disaccharides c. other unsaturated fatty acids d. saturated fatty acids People who have lactose intolerance are deficient in the a. enzyme that catalyzes the hydrolysis of lactose to galactose and glucose b. enzyme that catalyzes the conversion of galactose to glucose c. enzymes that catalyze the oxidation of lactose to CO_2 and H_2 O d. taste receptors for lactose, leaving a bitter taste
