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Chapter 2 The Chemistry of Microbiology




Question;17);Which of the following is NOT a characteristic of saturated fats?;A);they are usually solid at room;temperature.;B);they contain at least one double;bond.;C);they are found in animals.;D);their fatty acids pack tightly;together.;E);they are a form of stored energy.;18);Which of the following is NOT a characteristic of phospholipids?;A);they are found in cellular;membranes.;B);they can form micelles and;bilayers.;C);they contain fatty acids that;associate with water.;D);they contain a hydrophilic;phosphate "head.;E);they contain two fatty acids and;a phosphate functional group.;19);Organisms use carbohydrates in all of the following ways EXCEPT;A);as a component of cell walls.;B);as a long-term energy source.;C);as a short-term energy source.;D);to keep membranes flexible at low temperatures.;E);as a building block of DNA and RNA molecules.;20);Fats, proteins, and complex carbohydrates are all produced by;A);hydrolytic reactions.;B);dehydration synthesis.;C);exchange reactions.;D);hydrogen bonding.;E);catabolic reactions.;21);Which of the following is an example of a polysaccharide?;A);glycogen;B);glucose;C);fructose;D);deoxyribose;E);sucrose;22);Which of the following statements about proteins is FALSE?;A);They are composed of amino acids.;B);They have multiple levels of structural organization.;C);They can be hydrophobic, hydrophilic, or both.;D);Their primary function is energy storage.;E);They are formed by dehydration synthesis reactions.;23);All of the following are components of an amino acid EXCEPT;A);a carboxyl group.;B);a pentose group.;C);an amino group.;D);an?-carbon.;E);an R group.;24);Which of the following is found in nucleic acids?;A);ionic bonds;B);peptide bonds;C);purines;D);?-sheets;E);disulfide bridges


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