SOLVED

11) DNA contains the sugar ribose. 12) Guanine always pairs with cytosine. 13) Choose the INCORRECT statement. A) About 50 elements occur in measurable concentrations in living matter. B) About 25 elements have functions that are definitely known. C) Oxygen, carbon, hydrogen and nitrogen account for 96% of human body mass. D) Water is the most abundant compound in most living organisms. E) Mitochondria make up the nucleus of a cell. 14) Choose the INCORRECT statement. A) Tissues are the fundamental unit of all life. B) Tissues group into organs. C) Organs combine into organisms. D) A nucleus, mitochondria, and chloroplasts are components of cells. E) Living tissue is synthesized from simple precursors: N2, H2O, CO2. 15) Triglycerides are composed of which two compounds linked through an ester functionality? A) glycerol and long chain monoalcohols B) glycine and carboxylic acids C) glycerol and long-chain monocarboxylic acids D) lauric acid and glucose E) ethylene glycol and dicarboxylic acids 16) Choose the INCORRECT statement. A) Fats become rancid when they hydrolyze and cleave at the double bonds by oxidation. B) Antioxidants retard fat rancidity. C) Medical studies correlate a high intake of saturated fats and coronary heart disease. D) Healthy diets called for unsaturated fatty acids. E) In general, mammal fats are unsaturated. 17) Choose the INCORRECT statement. A) Lipids are hydrocarbons with basic properties. B) The acyl groups of triglycerides are fatty acids. C) A mixed triglyceride has different acyl groups. D) Lipids are constituents of plant and animal tissues that are soluble in solvents of low polarity. E) Triglycerides are esters of glycerol with long-chain monocarboxylic acids. 18) Choose the INCORRECT statement. A) When the long chain monocarboxylic acids are removed from a triglyceride they are called fatty acids. B) Saturated fatty acids have multiple double bonds. C) Glycerides can be hydrolyzed in alkaline solution to glycerol and salts of fatty acids. D) Salts of fatty acids are called soaps. E) The hydrolysis of triglycerides is called saponification. 19) Choose the INCORRECT statement. A) Triglycerides are glyceryl esters. B) Fats and oils are glyceryl esters. C) Oils have predominately saturated acid components. D) Oils are liquid at room temperature. E) Pure fats and oils are colorless, odorless and tasteless. 20) A glycerol ester of unsaturated fatty acids best describes a(n): A) vegetable oil B) vegetable starch C) animal fat D) lipid E) wax