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40) What is the product of oxidation of butanal? A) butane B) 2-butanol C) butanoic acid D) 1-butanol E) no reaction 41) What is the product of oxidation of 2-butanone? A) butanal B) 2-butanol C) butanoic acid D) 1-butanol E) no reaction 42) The substance that precipitates in a positive Benedict test is  ________. A) Ag B) CuO C) Cu2O D) none of these 43) Which compound.
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  1) Which molecule is a carboxylic acid? A) B)   C)    D)     E) CH3CH2CH2NH2 2) Which functional group contains a carbonyl group and a hydroxyl group bonded to the same carbon atom? A) aldehyde B) amide C) carboxylic acid D) ester E) ketone 3) Which functional group contains a carbonyl group and an ether linkage bonded.
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41) The bond connecting the two monosaccharides in sucrose is a(an) ________ linkage. A) α-1,4 glycosidic B) β-1, 4 glycosidic C) 1,2 anomeric D) α-1,6 glycosidic E) β-1,6 glycosidic 42) The molecular formula of the common disaccharides in human biochemistry is A) CH2O. B) C2(H2O)2. C) C6H12O6. D) C12H22O11. E) C12H24O12. 43) Sucrose is not a reducing sugar because its A) hemiacetal groups.
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30) The pH at which the positive and negative charges of an amino acid balance each other is called the A) isoelectric point. B) isobaric point. C) isobestic point. D) isotonic point. E) isomer point. 31) Which of the following objects is chiral? A) a Ping-Pong ball B) a nail C) a shoe D) a fork E) a windowpane 32) Which object.
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50) Which mechanism of enzyme control determines the amount of enzyme available? A) allosteric control B) competitive inhibition C) zymogen production D) covalent modification E) genetic control 51) Some enzymes are produced as zymogens because A) the reactions they catalyze are undesirable at the site of production. B) they must have both an active site and an allosteric.
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50) The fourth stage of metabolism, in which the high energy molecules from stage three are oxidized to produce ATP is referred to as A) active transport. B) reductive phosphorylation. C) the electron transport chain. D) the Krebs cycle. E) glycolysis. 51) All of the following molecules are directly involved in the electron transport chain except A).
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  1) All of the following statements concerning digestion are correct except A) digestion can be considered a catabolic process in which bulk food is broken down into individual small molecules. B) the major chemical reaction in digestion is enzyme-catalyzed hydrolysis of large molecules. C) the major physical processes in digestion are mixing, softening.
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60) All of the following statements concerning vitamins are true except A) fat-soluble vitamins have a high proportion of polar carbonyl and hydroxyl groups. B) it is possible to overdose on fat-soluble vitamins because they accumulate in fatty tissues. C) it is difficult to overdose on water-soluble vitamins because excess amounts can be.
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31) The reaction of a simple sugar with an alcohol produces a ________. A) glycoside B) cyclic acetal C) mixture of anomers D) all of the above E) none of the above 32) ________ of glucose leads to gluconic acid. A) Oxidation B) Reduction C) Isomerization D) Glycosidation E) Esterification 33) Common reducing reactions of monosaccharides are due to A) their cyclic structures. B).
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59) Proteins that consist of two or more chains assembled into a large 3-dimensional structure are said to display A) primary structure. B) secondary structure. C) tertiary structure. D) quaternary structure. E) none of the above 60) The quaternary structure of hemoglobin contains A) two subunits. B) four subunits. C) six subunits. D) eight subunits. 61) When a protein is ________,.
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31) Which acid would be expected to have the highest boiling point? A) acetic B) benzoic C) formic D) oxalic E) stearic 32) What is the IUPAC name of the compound shown? CH3CH2COOCH3 A) 2-butanoic acid B) 3-butanoic acid C) methyl ethanoate D) propyl methanoate E) methyl propanoate 33) What is the IUPAC name of the compound shown? A) 2-methyl propanamide B) N-methyl propanamide C).
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21) What is the IUPAC name of the molecule shown?  A) γ-amino-α-hydroxybutyric acid B) 4-amino-2-hydroxybutanoic acid C) α-amino-γ-hydroxybutyric acid D) 1-amino-3-hydroxybutanoic acid E) none of these 22) What is the IUPAC name of the molecule shown? A) ethyl butanoate B) butyl ethanoate C) acetyl butyrate D) butyl acetate E) 2-hexanoic ester 23) What is the common name of the molecule shown?.
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40) The following is an example of a A) tertiary amine. B) quanternary amine. C) tertiary ammonium salt. D) quaternary ammonium salt. E) secondary ammonium salt. 41) Which compound is an example of an amine salt? A) B)   C)    D)     E)      42) The reaction of the pyridinium ion with water is best represented.
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  1) All of the following can be classified as biomolecules except A) carbohydrates. B) proteins. C) lipids. D) nucleic acids. E) All of the above are biomolecules. 2) Which functional group is least important in biochemistry? A) amide B) amine C) aromatic D) ester E) hydroxyl 3) The protein configuration that is primarily determined from interactions between R groups is the A) primary.
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11) Which of the following bonds is not present in a carboxylic acid functional group? A) C=C B) C=O C) C-O D) O-H E) none of the above 12) The pleasant, characteristic odor of fruit flavorings is often associated with the presence of A) esters B) carboxylic acids C) carboxylate salts D) ketones 13) Which compound is a carboxylic acid? A).
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50) What is the product of the reduction of 3-methyl-2-pentanone? A) 3-methyl-2-pentanol B) 2-methyl-3-pentanol C) 3-methyl-2-pentanal D) 3-methyl-2-pentene E) no reaction 51) Which of the following products is formed when hydrogen is reacted with 3-methyl-2-butanone? A) a primary alcohol B) a secondary alcohol C) a tertiary alcohol D) an acetal 52) In biochemical reactions, reduction of carbonyl groups is carried out.
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70) When an alcohol reacts with phosphoric acid, the product is referred to as a A) phosphate salt. B) phosphate ester. C) phosphate anion. D) pyrophosphate. E) none of the above 71) Phosphate esters are prepared from A) phosphoric acid + alcohol. B) phosphoric acid + ester. C) phosphoric acid + carboxylic acid. D) phosphate + ester. E) phosphate + alcohol. 72).
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30) The common name of an industrial solvent used in many manufacturing processes is methyl ethyl ketone. The correct systematic name and structural formula of this compound are: 31) Tollens' reagent is used to A) distinguish aldehydes from ketones. B) reduce aldehydes. C) reduce ketones. D) oxidize ketones. E) distinguish amines from aldehydes. 32) Oxidation of an.
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21) Mutarotation is process where A) glucose undergoes reaction to form an equilibrium mixture of anomers. B) glucose reacts with an alcohol forming a cyclic acetal. C) the aldehyde group present in a sugar is converted to a hemiacetal. D) two glucose molecules react to form a disaccharide. E) glucose isomerizes to fructose. 22) All of.
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11) The cellular organelle associated with energy production is the A) nucleus. B) mitochondrion. C) Golgi apparatus. D) endoplasmic reticulum. E) lysosome. 12) The contents of a cell found between the nuclear membrane and the cell membrane are called the A) cytosol. B) mitochondria. C) mitochondrial matrix. D) organelles. E) cytoplasm. 13) The mitochondria are the location where ________ takes place and.
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39) By convention, the N-terminal end of a protein is usually placed on the ________ of a protein structure. A) right side B) left side C) center D) bottom E) top 40) The N-terminal amino acid in the peptide Ala-Leu-Gly-His-Pro is A) Alanine. B) Leucine. C) Glycine. D) Histidine. E) Proline. 41) The C-terminal amino acid in the peptide Ala-Leu-Gly-His-Pro is A) Alanine. B).
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  1) Photosynthesis is an ________ process because the free energy of the products is ________ the free energy of the reactants. A) endergonic; greater than B) exergonic; greater than C) endergonic; less than D) exergonic; less than E) equilibrium; the same as 2) The biochemical process in which complex molecules are broken down into simpler ones.
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40) Which statement is true concerning the relationship between FAD and FADH2? A) FADH2 is the oxidized form of FAD. B) FADH2 is the reduced form of FAD. C) The conversion of FADH2 to FAD is an acid/base reaction. D) The conversion of FADH2 to FAD is a cyclization reaction. E) none of the above 41).
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40) When a molecule similar to the correct substrate interacts with the active site of an enzyme, the process is called A) competitive inhibition. B) noncompetitive inhibition. C) irreversible inhibition. D) activation. E) covalent modification. 41) When a molecule other than the correct substrate interacts with some part of an enzyme to alter the shape of.
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11) Enzymes increase the rates of only certain reactions involving certain substances.  This general characteristic is called A) selectivity. B) specificity. C) enzyme regulation. D) catalytic efficiency. E) enzyme inhibition. 12) The nonprotein portion required by some enzymes for proper functioning is called a(an) A) zymogen. B) substrate. C) inhibitor. D) cofactor. E) activator. 13) Which aspect of enzyme structure is related.
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51) Glycogen is produced by ________, and its major function is ________. A) animals; energy storage B) animals; as a structural component C) plants; as a structural component D) plants; energy storage E) none of the above 52) Which polysaccharide has only β-1,4 glycosidic linkages? A) cellulose B) glycogen C) amylose D) amylopectin E) starch 53) Cellulose is produced by ________, and.
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21) The theory of enzyme mechanism that suggests a rigid, inflexible molecule is the ________ model. A) coenzyme B) induced-fit C) lock-and-key D) substrate specific E) active site 22) The theory of enzyme mechanism that suggests a flexible molecule whose shape is altered by the reaction conditions is the ________ model. A) coenzyme B) induced-fit C) lock-and-key D) substrate specific E).
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11) Which molecule is an aldehyde? A) B)   C)    D)     E)      12) The IUPAC name for acetone is A) 2-propanal. B) 3-propanal. C) 2-propanone. D) 1-propanone. E) dimethyl ketone. 13) The IUPAC name for dimethyl ketone is A) 2-propanal. B) 3-propanal. C) 2-propanone. D) 1-propanone. E) acetone. 14) The correct name for CH3CH(CH3)CH2CHO is A) 2-methylbutanal. B) 3-methyl-1-butanal. C) 3-methylbutanal. D) isopentanal. E).
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50) When an amine reacts with a carboxylic acid at high temperature the major product is A) an ester. B) an amide. C) a thiol. D) an ether. E) an alcohol. 51) The common chemical name of aspirin is A) acetamide. B) acetylsalicylic acid. C) phenylalanyl aspartic acid. D) acetaminophen. E) lidocaine. 52) The reactants needed to produce simple polyamides (nylons) are A).
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  1) A carbohydrate can be defined as a molecule A) composed of carbon atoms bonded to water molecules. B) composed of amine groups and carboxylic acid groups bonded to a carbon skeleton. C) composed mostly of hydrocarbons and soluble in non-polar solvents. D) that is an aldehyde or ketone and that has more than.
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21) Amino acids found in proteins all have the following features: A) All are α-amino acids. B) All are L-amino acids. C) All are D- amino acids. D) All are correct. E) None are correct. 22) Which of these amino acids has a thiol group as part of its side chain? A) cysteine B) tyrosine C) histidine D) threonine E) methionine 23).
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49) Which pair of amino acids can have ionic interactions? A) arginine and glutamic acid B) asparagine and lysine C) leucine and alanine D) glutamic acid and serine E) glycine and asparagine 50) Which pair of amino acids can form hydrogen bonds between their R groups? A) arginine and glutamate B) aspartate and lysine C) leucine and alanine D) glutamine.
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  1) Enzymes are members of which class of biomolecules? A) carbohydrates B) lipids C) nucleic acids D) proteins E) steroids 2) What is the function of enzymes? A) structure and support B) energy reserves C) biochemical catalysts D) communication between cells E) physical protection 3) The reactant in an enzyme-catalyzed reaction is called the A) hormone. B) substrate. C) cofactor. D) inhibitor. E) vitamin. 4) Which of the.
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11) Molecules such as erythrose and threose, which are stereoisomers but not mirror images, are referred to as a pair of ________. D- and L-threose are mirror images and are referred to as a pair of ________. A) enantiomers; diastereomers B) diastereomers; enantiomers C) anomers; diastereomers D) diastereomers; anomers E) anomers; enantiomers 12) How many stereoisomers.
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21) A metabolic pathway in which a series of steps, each using different enzymes, regenerates one of the early reactants, is a(an) ________ pathway. A) anabolic B) catabolic C) cyclic D) linear E) spiral 22) The common molecule produced from all foods at the second stage of catabolism is A) ADP. B) acetyl-SCoA. C) glucose. D) citric acid. E) carbon dioxide. 23).
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