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Bio Chem - Exam 2
front 1 How is ethanol metabolizes in the liver? a. Ethanol is metabolized by a series of oxidation reactions to produce carbon dioxide and water b. Ethanol is metabolizes by a series of reduction reactions to produce ethane gas c. Ethanol is not metabolized, but rather it is excreted as a poison by the kidneys d. Ethanol is metabolized by a series of oxidation reactions to procure lactic acid and water | back 1 a. Ethanol is metabolized by a series of oxidation reactions to produce carbon dioxide and water |
front 2  Select the compound containing the alkyne functional group. a. compound III b. compound IV c. compound I d. compound II | back 2 a. compound III |
front 3  The following molecules is a __________ amine. a. This molecule is not an amine b. primary c. secondary d. tertiary | back 3 b. primary |
front 4  Which statement BEST describes the following reaction? a. In this reaction, ethanol is reduced and NAD+ is oxidized b. In this reaction, ethanol is oxidized and NAD+ is reduced c. In this reaction, both ethanol and NAD+ are reduced d. In this reaction, both ethanol and NAD+ are oxidized | back 4 b. In this reaction, ethanol is oxidized and NAD+ is reduced |
front 5  Which of the molecules below are branched? a. II, III, and IV b. II and IV c. I only d. I and III | back 5 b. II and IV |
front 6  Glucose, the most common sugar, contain which of the following carbonyl-containing functional groups? a. ketone b. carboxylic acid c. amide d. aldehyde | back 6 a. aldehyde |
front 7  Which of the following molecules contain(s) an alcohol? a. II only b. Both I and II contain an alcohol c. III only d. I only | back 7 a. II only |
front 8  Which of the following organic molecules contain at least one functional group? a. Only molecules III and IV contain a functional group b. Molecules II, III, and IV contain at least one functional group c. None of these molecules contain a functional group | back 8 b. Molecules II, III, and IV contain at least one functional group |
front 9 The following reaction is an example of a(n) ______________ reaction. CH4 + 2O2 → CO2 + 2H2O I. Oxidation–reduction II. Acid-base III. Hydrogenation a. I and II only b. I only c. III only d. I and III only | back 9 b. I only |
front 10 Which of the following functional group does not contain a carbonyl carbon? a. ketone b. aldehyde c. ether d. amide | back 10 c. ether |
front 11 Amines are ______________ because they react with water to ______________ a proton. a. bases; donate b. acids; donate c. bases; accept d. acids; accept | back 11 c. bases; accept |
front 12  What is the product of the following reaction? ... | back 12 ... |
front 13  What type of biomolecule is shown below? a. a saturated fatty acid b. a nucleic acid c. a polyunsaturated fatty acid d. a sugar | back 13 c. a polyunsaturated fatty acid |
front 14 FAD and NAD+ are example of a. enzymes b. inhibitors c. coenzymes d. sustrates | back 14 c. coenzymes |
front 15 Examples of thiols in nature include a. garlics b. onions c. skunk spray d. all of these are examples of thiols | back 15 d. all of these are examples of thiols |
front 16  What do the following molecule have in common? a. an alcohol b. a carbonyl-containing functional group c. an ionic bond d. a carbon with a linear molecular geometry | back 16 b. a carbonyl-containing functional group |
front 17 Enzymes are categorized by a. the cell and tissue type in which they are located b. none of the above are correct c. the type of reaction that they catalyze d. their size and number of amino acids that compromise them | back 17 c. the type of reaction that they catalyze |
front 18  Sorbitol is a sweetener often used in chewing gum and diet drinks. It is obtained by the following reaction. Is glucose oxidized or reduced during the reaction? a. many different reactions occur b. it is reduced c. it is both oxidized and reduced d. it is oxidized | back 18 b. it is reduced |
front 19  Glucose is an example of a(n) a. diol b. triol c. polyol d. phenol | back 19 c. polyol |
front 20 Hydrocarbons are ______________ and interact only through ______________ forces. a. polar; dispersion b. polar; dipole-dipole c. non polar; dispersion d. non polar; dipole-dipole e. polar; hydrogen bonding | back 20 c. non polar; dispersion |
front 21  What type of reaction is this? a. dehydration b. hydration c. oxidation d. reduction | back 21 b. hydration |
front 22  Which molecule is chiral? a. molecule b b. molecule e c. molecule a d. molecule d e. molecule c | back 22 e. molecule c |
front 23 The term substrate refers to the _______________ in a biochemical reaction. a. product b. catalyst c. enzyme d. reactant | back 23 d. reactant |
front 24  Which of these fats is liquid at room temperature? a. B only b. A only c. A and B | back 24 b. A only |
front 25 Which molecule contains an amide? ... | back 25 ... |
front 26  Which terms from this list BESY describe the following compound? I. Alkane II. Alkene III. Alkyne IV. Aromatic V. Saturated hydrocarbon VI. Unsaturated hydrocarbon a. III and V b. II and VI c. I and V d. III and VI e. II and V | back 26 d. III and VI |
front 27 What structural characteristic is shared by the aldehydes and the ketones? a. Aldehydes and ketones have no shared characteristics b. They both are straight chain compounds c. Aldehydes and ketones both contain a carbonyl carbon d. Both of these classes are only seen as 5 carbon skeleton compounds | back 27 c. Aldehydes and ketones both contain a carbonyl carbon |
front 28  Which statement BEST describes the relationship between the following two structures? a. They have different molecular formulas b. One is saturated, and the other is unsaturated c. They are identical molecules in the same conformation d. They are isomers | back 28 d. They are isomers |
front 29  Which BEST describes the functional group(s) in this molecule? a. an alcohol and an amine b. a carboxylic acid c. an alcohol, a sodium, and a carbonyl d. an alcohol and a ketone | back 29 b. a carboxylic acid |
front 30 What is the molecular formula of hexane? a. C4H10 b. C3H8 c. C6H14 d. C5H12 e. C2H6 | back 30 c. C6H14 |
front 31  Vanillin is the molecule tat gives vanilla extract its characteristic oder and flavor. Which functional group in vanillin is an aldehyde? a. III b. I c. IV d. II | back 31 c. IV |
front 32 Which statement BEST describes a similarity between a hydration and dehydration reaction? a. They both involve hydrogen b. They both result in forming one molecule from two c. They both result in splitting a molecule d. They both involve water | back 32 d. They both involve water |
front 33 An ester, thirster, or amide can all undergo hydrolysis. Which characteristic do these three reactions have in common? a. All require a strong acid to occur b. All are very fast reactions c. All are very unfavorable d. All produce a carboxylic acid | back 33 d. All produce a carboxylic acid |
front 34  Below are several different molecules. Which one contains a ketone? a. Only I and II are ketones b. All of these molecules contain a ketone c. Only I and IV are ketones d. Only I is a ketone | back 34 a. Only I and II are ketones |
front 35 Which element is NOT a heteroatom? a. oxygen b. nitrogen c. carbon d. sulfur | back 35 c. carbon |
front 36  Heptane is an unbranded hydrocarbon; which structure is heptane? | back 36 photo above |
front 37  Below is a ball-and-stick model of acetone. Which of the following Lewis structures is acetone? a. structure d b. structure e c. structure c d. structure a e. structure b | back 37 e. structure b |
front 38  Which of the following molecules contains a primary alcohol? a. adrenalin and serine b. chitin and glucose c. chitin, glucose, and serine d. glucose and adrenalin | back 38 c. chitin, glucose, and serine |
front 39  Which structure is a monosaccharide? a. structure b b. structure c c. structure d d. structure a | back 39 d. structure a |
front 40  Which of the following compounds contain a heteroatom? a. Only II contains a heteroatom b. III and IV contain a heteroatom c. I and II contain a heteroatom d. I, II, and III contain a heteroatom | back 40 c. I and II contain a heteroatom |
front 41  D-Fructose is a simple sugar. What is the functional group indicated by the arrow? a. ketone b. aldehyde c. alcohol d. carboxylic acid | back 41 a. ketone |
front 42 Soap has a polar head and non polar tail. Thus, soap is ________________. a. ambiguous b. amphoteric c. ambivalent d. amphibious e. ambidextrous | back 42 b. amphoteric |
front 43 Enzyme activity is measured by a. How easily it denatures in acid b. Determining the amount of protein present c. How many substrates it can combine d. Determining the amount of product formed within a certain amount of time | back 43 d. Determining the amount of product formed within a certain amount of time |
front 44  The Fischer projection for fructose is shown below. Fructose is a ________________. a. pentose b. hexose c. tetrose d. triose | back 44 b. hexose |
front 45  Tetracycline is a common antibiotic. Select the choice in which the two boxed functional groups are correctly identified. a. I: amine; II: amine b. I: amide; II: amine c. I: amine; II: amide d. I: amide; II: amide | back 45 b. I: amide; II: amine |
front 46  Which of the following molecules contain(s) an ether functional group? a. I only b. Both I and II c. II only d. III only | back 46 a. I only |
front 47 A molecule that is non superimposable on it mirror image is/are _________________. a. reflective b. identical c. conformers d. chiral | back 47 d. chiral |
front 48  Which of the following compounds is a saturated hydrocarbon? a. III and IV b. I only c. IV only d. I and II | back 48 d. I and II |
front 49  What is the structure of the conjugate acid formed when methylamine accepts a hydrogen ion (H+) from water? a. structure b b. structure c c. structure a d. structure e e. structure d | back 49 c. structure a |
front 50 In an oxidation-reduction reaction, the species that gains electrons is a. reduced b. oxygen c. oxidized d. hydrogen | back 50 a. reduced |