Chapter 23 Review Questions

General Chemistry: Atoms First, 2e (McMurry and Fay)Chapter 23 Organic and Biological Chemistry

23.1 Multiple Choice Questions

1) Which of the following statements about carbon is false? A) Carbon compounds have covalent bonds.B) Carbon compounds can have multiple bonds.C) Carbon is tetravalent.D) Carbon uses sp2 hybrids to form tetrahedral structures.Answer: DDiff: 1Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

2) The most important characteristic of carbon atoms for forming organic molecules isA) ability to bond together to form long chains.B) ability to form multiple covalent bonds.C) use of hybrid orbitals.D) all of the above are importantAnswer: DDiff: 1Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

3) Another term for alkanes isA) alkenes.B) alkynes.C) saturated hydrocarbons.D) unsaturated hydrocarbons.Answer: CDiff: 1Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

4) Compounds that have the same formula but different molecular structures are calledA) isoelectronic.B) isomers.C) isotones.D) isotopes.Answer: BDiff: 1Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

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5) Which of the following statements about isomers is false?A) All alkanes have branched chain isomers.B) As the number of carbon atoms increase in a compound, so do the number of possible isomers.C) Isomers have different physical properties.D) Isomers have the same formula but different molecular structures.Answer: ADiff: 1Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

6) How many isomers are there for C5H12 ?A) 3B) 4C) 5D) 6Answer: ADiff: 2Topic: Section 23.1 Organic Molecules and Their Structures: AlkanesAlgo. Option: algorithmic

7) Which is the condensed structure of a straight-chain hydrocarbon?

A) IB) IIC) IIID) IVAnswer: ADiff: 2Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes


8) Which condensed structure below representing an alkane is not correct?A) CH3CH2CH3B)

C) CH3CH2CH2CH3D)

Answer: BDiff: 2Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

9) Which of the following condensed structures represent the same molecule?

A) I and IIB) II and IVC) III and IVD) II and IIIAnswer: CDiff: 2Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

10) Which of the structures below are identical?

A) I and II B) II and IIIC) III and IVD) I and IVAnswer: BDiff: 2Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes


11) Some of the products from reaction of bromine and propane are shown below. (The hydrogen atoms are not shown in the structures.) How many are identical structures?

A) 2 B) 3C) 4D) All are isomers of each other.Answer: CDiff: 2Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

12) Which one of the structures below is different from the other three?

A) IB) IIC) IIID) IVAnswer: ADiff: 2Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

13) Which of the following statements is false regarding functional groups?A) The chemical properties of the functional group dictate the chemistry of the larger molecule.B) Each functional group has a characteristic chemical behavior.C) A functional group consists of an atom or a group of atoms that is part of a larger molecule.D) A functional group consists of only carbon and hydrogen atoms.Answer: DDiff: 1Topic: Section 23.2 Families of Organic Compounds: Functional Groups


14) Identify the functional group:

A) alcoholB) amineC) amideD) esterAnswer: CDiff: 1Topic: Section 23.2 Families of Organic Compounds: Functional Groups

15) Identify the functional group:

A) aldehydeB) ketoneC) esterD) etherAnswer: DDiff: 1Topic: Section 23.2 Families of Organic Compounds: Functional Groups


16) Which functional group below represents a carboxylic acid?A)

B)

C)

D)

Answer: DDiff: 1Topic: Section 23.2 Families of Organic Compounds: Functional Groups

17) Which functional group below represents a ketone?A)

B)

C)

D)

Answer: BDiff: 1Topic: Section 23.2 Families of Organic Compounds: Functional Groups


18) Which functional group below represents an aldehyde?A)

B)

C)

D)

Answer: CDiff: 1Topic: Section 23.2 Families of Organic Compounds: Functional Groups

19) The functional groups in the molecule below are

H2NCH2CO2H

A) alkane, amide, and carboxylic acid.B) alkane, amine, and carboxylic acid.C) alkane, amide, ketone, and alcohol.D) alkane, amine, ketone, and alcohol.Answer: BDiff: 2Topic: Section 23.2 Families of Organic Compounds: Functional Groups

20) Which one of the following compounds is an alcohol?A) CH3OCH3B) CH3COCH3C) (CH3)2CHOHD) CH3CO2HAnswer: CDiff: 2Topic: Section 23.2 Families of Organic Compounds: Functional Groups


21) The functional groups in the molecule below are

O O

HCCH2 COCH3

A) alkane, aldehyde, and ester.B) alkane, aldehyde, ketone, and ether.C) alkane, carboxylic acid, and ester.D) alkane, ketone, and ester.Answer: ADiff: 2Topic: Section 23.2 Families of Organic Compounds: Functional Groups

22) Which statement below is false concerning nomenclature rules for alkanes?A) Carbon atoms are numbered starting with the atom farthest from the branching point.B) Each branching group is assigned a number referring to its point of attachment in the parent chain. C) The name of the alkane is written as a single word.D) The parent name is taken from the longest continuous chain of carbon atoms.Answer: ADiff: 2Topic: Section 23.3 Naming Organic Compounds

23) An alkyl group is named for the part of the alkane group that remains after a ________ is removed.A) C atomB) CH3 groupC) CH2 groupD) H atomAnswer: DDiff: 1Topic: Section 23.3 Naming Organic Compounds

24) If the point of attachment to an alkane is by the middle carbon in a propyl group, the group is called A) isopropyl.B) n-propyl.C) sec-propyl.D) tert-propyl.Answer: ADiff: 2Topic: Section 23.3 Naming Organic Compounds


25) What is the name for the alkyl group:

A) isobutylB) tert-butylC) tributylD) trimethylAnswer: BDiff: 2Topic: Section 23.3 Naming Organic Compounds

26) What is the IUPAC name for the following compound?

A) heptaneB) 3, 3-dimethylpentaneC) 2, 2-dimethyl-2-ethylpropaneD) 2, 2-diethylpropaneAnswer: BDiff: 3Topic: Section 23.3 Naming Organic Compounds

27) What is the IUPAC name for the continuous carbon chain of C10H22? A) decaneB) dipentaneC) tenalkaneD) tenaneAnswer: ADiff: 2Topic: Section 23.3 Naming Organic Compounds


28) What is the IUPAC name for the following compound:

A) 1, 3-dimethyl-1-ethylhexaneB) 4, 6-dimethyl-6-ethylhexaneC) 3, 5-dimethyloctaneD) sec-hexylbutaneAnswer: CDiff: 3Topic: Section 23.3 Naming Organic Compounds

29) Which of the following compounds is 5-ethyl-4-isopropyl-2-methylnonane?A)

B)

C)

D)

Answer: DDiff: 4Topic: Section 23.3 Naming Organic Compounds


30) Which name is not correct?A) 1, 2-dichloropentaneB) 2, 3-dimethylbutaneC) 2-ethylbutaneD) 4-propylheptaneAnswer: CDiff: 3Topic: Section 23.3 Naming Organic Compounds

31) Which name is not correct?A) 2, 2-dimethylbutaneB) 2, 3-dimethylpentaneC) 2, 3, 3-trimethylbutaneD) 2, 3, 3-trimethylpentaneAnswer: CDiff: 3Topic: Section 23.3 Naming Organic Compounds

32) The names of compounds with carbon-carbon double bonds contain the suffixA) -ane.B) -ene.C) -yne.D) -one.Answer: BDiff: 1Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

33) Which class of hydrocarbons has the general formula CnH2n+2?A) alkanesB) alkenesC) alkynesD) cylcloalkanesAnswer: ADiff: 1Topic: Section 23.3 Naming Organic Compounds

34) What class of hydrocarbons has the general formula CnH2n?A) alkanesB) alkenes and cycloalkanesC) alkynesD) aromaticsAnswer: BDiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes


35) What is the hybridization of the carbon in (CH3)2C =CHC N indicated by the asterisk (*)?A) spB) sp2

C) sp3

D) dsp3Answer: BDiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

36) Which compound is a saturated hydrocarbon?A) benzeneB) cyclohexeneC) 2-methylpentaneD) propyleneAnswer: CDiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and AlkynesAlgo. Option: algorithmic

37) What is the molecular geometry around the carbon in (CH3)2C=CHC N indicated by theasterisk (*)?A) linearB) trigonal planarC) trigonal pyramidalD) tetrahedralAnswer: ADiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

38) Which of the molecules shown below are unsaturated?(1) CH3CH2CH2CH(CH3)2(2) CH3CH=CHCH(CH3)2(3) HC CCH2CH(CH3)2

A) All are unsaturated.B) Only (2) and (3) are unsaturated.C) Only (2) is unsaturated.D) Only (3) is unsaturated.Answer: BDiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes


39) Which of the following statements about cis-trans isomers is not correct?A) Conversion between cis- and trans-isomers occurs easily by rotation around the double bond.B) In the trans- isomer, the groups of interest are on opposite sides across the double bond.C) In the cis- isomer, the groups of interest are on the same side of the double bond.D) There are no cis-trans isomers in alkynes.Answer: ADiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

40) Which one of the following molecules can rotate freely around its carbon-carbon bond?A) acetyleneB) cyclopropaneC) ethaneD) ethyleneAnswer: CDiff: 3Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

41) How many geometrical and structural isomers are there of butene?A) 3B) 4C) 5D) 6Answer: ADiff: 3Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

42) Which compound will have the largest dipole moment?A) cis-1, 2-dichloroethyleneB) trans-1, 2-dichloroethyleneC) tetrabromoethyleneD) tetrachloroethyleneAnswer: ADiff: 4Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

43) Which of the following is not a geometric (cis-trans) isomer?A) 1, 1-dichloro-1-buteneB) 1, 2-dichloro-1-buteneC) 2-buteneD) 2-chloro-2-buteneAnswer: ADiff: 3Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes


44) Which of the following is trans-2-butene? (Only bonds are shown in the skeletal structures below; the carbon and hydrogen atoms are deleted.)

A) structure aB) structure bC) structure cD) none of theseAnswer: BDiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

45) What is the name of the following structure?

A) cis-1-ethyl-2-chloroethaneB) cis-1-chloro-1-buteneC) trans-1-chloro-1-buteneD) trans-1-chloro-2-ethylethaneAnswer: CDiff: 3Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes


46) What is the name of the following structure?

A) tert-butylethyneB) 3, 3-dimethyl-1-pentyneC) 3-ethyl-3-methyl-1-butyneD) trans-ethylmethylbutyneAnswer: BDiff: 3Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

47) Which of the following is a correct name for an alkyne?A) 3-methyl-2-pentyneB) 5-methyl-3-pentyneC) 2, 2-dimethyl-4-pentyneD) 3, 3-dimethyl-1-pentyneAnswer: DDiff: 4Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

48) Which compound will exhibit cis-trans isomerism?A) 1, 2-dichloroethaneB) 1, 2-dichloroetheneC) dichloroethyneD) ethyleneAnswer: BDiff: 3Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

49) The most important synthetic chemical reactions that alkenes and alkynes undergo are calledA) addition reactions.B) combustion reactions.C) photochemical halogenation reactions.D) substitution reactions.Answer: ADiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes


50) Name the product of hydrogenation of trans-2-pentene.A) pentaneB) cis-2-penteneC) trans-2-pentaneD) none of theseAnswer: ADiff: 4Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

51) Hydrogenation of vegetable oils converts them into what type of molecule?A) estersB) ethersC) polymersD) saturated fatsAnswer: DDiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

52) Name the product obtained from the addition of bromine to 3-methyl-1-butene.A) 1, 1-dibromobutaneB) 1, 2-dibromo-3-methylbutaneC) 1, 2-dibromopentaneD) trans-1, 2-dibromobuteneAnswer: BDiff: 4Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

53) What is the product when pure water and ethene are mixed?A) an alcoholB) a carboxylic acidC) an etherD) no reaction occursAnswer: DDiff: 3Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

54) In the addition reaction of water and propene in an acidic solution, the product is A) an alcohol.B) a carboxylic acid.C) an ether.D) a ketone.Answer: ADiff: 3Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes


55) The cycloalkane represented by a square is called ________ and has the molecular formula ________.A) cyclopropane, C3H6B) cyclopropane, C3H8C) cyclobutane, C4H4D) cyclobutane, C4H8Answer: DDiff: 3Topic: Section 23.5 Cyclic Organic Compounds

56) Which name is not correct?A) 1, 1 dimethylcyclobutaneB) 1, 2-dimethylcyclobutaneC) 1, 3-dimethylcyclohexaneD) 1, 4-dimethylcyclopentaneAnswer: DDiff: 3Topic: Section 23.5 Cyclic Organic Compounds

57) A molecule that has the molecular formula isA) 3-methlycyclopentene.B) cyclohexane.C) hexane.D) 2-hexene.Answer: ADiff: 3Topic: Section 23.5 Cyclic Organic Compounds

58) What are the C–C–C bond angles in cyclopropane and cyclohexane?A) 60° in both moleculesB) 60° in cyclopropane and 109.5° in cyclohexaneC) 60° in cyclopropane and 120° in cyclohexaneD) 109.5° in both moleculesAnswer: BDiff: 2Topic: Section 23.5 Cyclic Organic Compounds

59) Which compound is not an isomer of the other three?A) cyclohexaneB) 1, 2-dimethylcyclobutaneC) 1, 2-dimethylcyclopropaneD) methylcyclopentaneAnswer: CDiff: 3Topic: Section 23.5 Cyclic Organic Compounds


60) Which of the following statements about cycloalkanes is true?A) The bonds in cyclopropane and cyclobutane are weaker than other cycloalkanes.B) Cycloalkanes are also called "acyclic" compounds.C) Cyclopropane has 109° bond angles.D) Most cycloalkanes are planar molecules.Answer: ADiff: 2Topic: Section 23.5 Cyclic Organic Compounds

61) Which of the following statements about benzene is true? BenzeneA) contains 3 long bonds and 3 short bonds.B) is a puckered, six-membered ring.C) is unusually stable because of delocalized pi electrons. D) readily undergoes addition reactions.Answer: CDiff: 2Topic: Section 23.6 Aromatic Compounds

62) What type of hybridization does a carbon atom have in a six-membered aromatic ring?A) spB) sp2

C) sp3

D) sp3dAnswer: BDiff: 1Topic: Section 23.6 Aromatic Compounds

63) Which reaction is not characteristic of aromatic compounds?A) additionB) halogenationC) nitrationD) sulfonationAnswer: ADiff: 2Topic: Section 23.6 Aromatic Compounds


64) Which structures represent the same dibromobenzene compound?

A) I and IVB) II and IIIC) I, II, and IIID) All structures are identical.Answer: BDiff: 1Topic: Section 23.6 Aromatic Compounds

65) Which structure is meta-dibromobenzene?

A) structure IB) structure IIC) structure IIID) structure IVAnswer: ADiff: 2Topic: Section 23.6 Aromatic Compounds


66) Which structure is para-dibromobenzene?

A) structure IB) structure IIC) structure IIID) structure IVAnswer: DDiff: 2Topic: Section 23.6 Aromatic Compounds

67) Which of the following statements about amines is not correct? Amines areA) bases (proton acceptors).B) converted to ammonium salts by reaction with HCl.C) organic derivatives of ammonia.D) very water soluble.Answer: DDiff: 2Topic: Section 23.7 Alcohols, Ethers, and Amines

68) The boiling point of 1-propanol should be ________ than the boiling point of methyl ethyl ether.A) higher thanB) lower thanC) the same asD) cannot be determinedAnswer: ADiff: 3Topic: Section 23.7 Alcohols, Ethers, and Amines

69) What is the proper name for (CH3)2CHCH(OH)CH3?A) isopropanolB) isopentanolC) 2-methylpentanolD) 3-methyl-2-butanolAnswer: DDiff: 3Topic: Section 23.7 Alcohols, Ethers, and Amines


70) "Wood alcohol" is the common name for A) methanol.B) ethanol.C) 2-propanol.D) 1, 2-ethanediol.Answer: ADiff: 1Topic: Section 23.7 Alcohols, Ethers, and Amines

71) "Rubbing alcohol" is the common name forA) methanol.B) ethanol.C) 2-propanol.D) 1, 2-ethanediol.Answer: CDiff: 1Topic: Section 23.7 Alcohols, Ethers, and Amines

72) "Glycerol" is the common name forA) ethanol.B) 2-propanol.C) 1, 2-ethanediol.D) 1, 2, 3-propanetriol.Answer: DDiff: 2Topic: Section 23.7 Alcohols, Ethers, and Amines

73) Which of the following compounds is most soluble in water?A) decanolB) dimethyl etherC) ethane D) ethanolAnswer: DDiff: 2Topic: Section 23.7 Alcohols, Ethers, and Amines

74) How many ether isomers have the formula C4H10O?A) 2B) 3C) 4D) 5Answer: BDiff: 3Topic: Section 23.7 Alcohols, Ethers, and Amines


75) What type of compound contains the -NH2 functional group?A) alcoholB) amineC) carboxylic acidD) etherAnswer: BDiff: 1Topic: Section 23.7 Alcohols, Ethers, and Amines

76) Which of the following is the most soluble in water?A) trimethylammonium chlorideB) methaneC) trimethyl amineD) dimethyl etherAnswer: ADiff: 3Topic: Section 23.7 Alcohols, Ethers, and Amines

77) What is the common name for benzeneamine?A) anilineB) tolueneC) xyleneD) phenolAnswer: ADiff: 2Topic: Section 23.7 Alcohols, Ethers, and Amines

78) The reaction of methylamine with HCl producesA) methyl ammonium chloride.B) dimethylamine and ammonium chloride.C) methanol and ammonium chloride.D) methanol and chloramine.Answer: ADiff: 3Topic: Section 23.7 Alcohols, Ethers, and Amines


79) The C-C=O bond angle in acetic acid, shown below, is closest to

O

CH3C–OH

A) 90°.B) 109.5°.C) 120°.D) 180°.Answer: CDiff: 2Topic: Section 23.8 Carbonyl Compounds

80) The H-C-H bond angles in acetic acid, shown below, are closest to

O

CH3C–OH

A) 90°.B) 109.5°.C) 120°.D) 180°.Answer: BDiff: 2Topic: Section 23.8 Carbonyl Compounds

81) What is the common name for the simplest ketone, propanone?A) acetal B) acetoneC) carbanoneD) formalinAnswer: BDiff: 1Topic: Section 23.8 Carbonyl Compounds

82) Which of the following molecules is the most highly oxidized?A) acetaldehydeB) acetic acidC) ethanolD) 1, 2-ethanediolAnswer: BDiff: 3Topic: Section 23.8 Carbonyl Compounds


83) Which of the following does not contain a carbonyl group?A) an alcohol B) an aldehydeC) an amide D) an esterAnswer: ADiff: 2Topic: Section 23.8 Carbonyl Compounds

84) Which one of the following does not contain a polar carbonyl group?A) an amineB) a carboxylic acidC) an ester D) a ketoneAnswer: ADiff: 2Topic: Section 23.8 Carbonyl Compounds

85) Which of the following pairs have the most similar chemical properties?A) alkanes and carboxylic acidsB) alkenes and aromaticsC) amines and estersD) ketones and aldehydesAnswer: DDiff: 2Topic: Section 23.8 Carbonyl Compounds

86) Which one of the following behaves like an acid?A) CH3COCH3B) (CH3)2NHC) C2H5OHD) C2H5COOHAnswer: DDiff: 1Topic: Section 23.8 Carbonyl Compounds

87) How many grams of Ca(OH)2 are needed to neutralize 5.00 g of 3-methylbutanoic acid?A) 1.81 gB) 2.10 gC) 3.63 gD) 4.20 gAnswer: ADiff: 3Topic: Section 23.8 Carbonyl Compounds


88) What type of compound is formed when a carboxylic acid reacts with an alcohol?A) an aldehydeB) an amide C) an aromaticD) an esterAnswer: DDiff: 3Topic: Section 23.8 Carbonyl Compounds

89) What is the name of the product formed by the reaction of propanoic acid with ethanol?A) ethyl propanoateB) pentanoneC) pentyl esterD) ethylpropylketoneAnswer: ADiff: 4Topic: Section 23.8 Carbonyl Compounds

90) When propyl ethanoate is hydrolyzed the products areA) 1-propanol and acetic acid.B) propanone and ethanol.C) 2-propanol and propanoic acid.D) methanal and ethanol.Answer: ADiff: 4Topic: Section 23.8 Carbonyl Compounds

91) What are the products of a hydrolysis reaction of an ester?A) an alcohol and an alkaneB) a carboxylic acid and an alcoholC) an ether and an alkeneD) a ketone and an aldehydeAnswer: BDiff: 3Topic: Section 23.8 Carbonyl Compounds


92) Which ester below formed propanoic acid and isopropyl alcohol by hydrolysis reaction with water?A)

B)

C)

D)

Answer: ADiff: 4Topic: Section 23.8 Carbonyl Compounds

93) Which statement about the differences between an amine and an amide is not correct?A) Amides act as proton acceptors while amines do not.B) Amines are basic and amides are neutral.C) Amines form ammonium salts when treated with acid; amides do not.D) The lone pair of electrons on amides is held more tightly than the lone pair on an amine.Answer: ADiff: 3Topic: Section 23.8 Carbonyl Compounds

94) The reaction of an amine and a carboxylic acid produces what kind of compound?A) alcoholB) amideC) esterD) ketoneAnswer: BDiff: 3Topic: Section 23.8 Carbonyl Compounds


95) What is the name of the product formed by the reaction of butanoic acid with methylamine?A) N-methylbutamideB) N-methylbutanamideC) pentanoneD) pentyl amineAnswer: BDiff: 4Topic: Section 23.8 Carbonyl Compounds

96) Which one of the following behaves like a base?A) CH3CONHCH3B) (CH3)2NHC) C2H5CONHCH3D) All of the above are bases.Answer: BDiff: 3Topic: Section 23.8 Carbonyl Compounds

97) What are the products of acid-catalyzed hydrolysis reaction of amides and water?A) an alcohol and an alkaneB) an amine and a ketoneC) a carboxylic acid and an amine saltD) an ester and an etherAnswer: CDiff: 3Topic: Section 23.8 Carbonyl Compounds

98) Which one of the following molecules is the most polar?A) acetaldehydeB) acetic acidC) ethaneD) ethyleneAnswer: BDiff: 3Topic: Section 23.8 Carbonyl CompoundsAlgo. Option: algorithmic


Shown are ball-and-stick (1) and space-filling (2) models of methane.

99) What is the H–C–H bond angle?A) 90°B) 109.5°C) 120°D) 180°Answer: BDiff: 1Topic: Conceptual Problems

100) What hybrid orbitals are used by carbon to form covalent bonds with hydrogen?A) spB) sp2

C) sp3

D) sp3dAnswer: CDiff: 2Topic: Conceptual Problems


Shown are ball-and-stick (1) and space-filling (2) models of ethylene.

101) What is the H–C–H bond angle?A) 90°B) 109.5°C) 120°D) 180°Answer: CDiff: 1Topic: Conceptual Problems


C) sp3

D) sp3dAnswer: BDiff: 1Topic: Conceptual Problems


Shown are ball-and-stick (1) and space-filling (2) models of acetylene.

103) What is the H–C–C bond angle?A) 90°B) 109.5°C) 120°D) 180°Answer: DDiff: 1Topic: Conceptual Problems


C) sp3

D) sp3dAnswer: ADiff: 1Topic: Conceptual Problems


105) Which of these molecules above have a partial positive charge (δ+) on the carbon atom?A) only (1)B) only (3)C) (1) and (3)D) (2) and (4)Answer: DDiff: 3Topic: Conceptual Problems

106) Which of these molecules above have a large partial negative charge (δ-) on the carbon atom?A) only (1)B) only (3)C) (1) and (3)D) (2) and (4)Answer: BDiff: 3Topic: Conceptual Problems


107) In the figure above, which structures are identical?A) All are identical.B) None are identical.C) only (1) and (4)D) only (1), (3), and (4)Answer: CDiff: 2Topic: Conceptual Problems

108) In the figure above, which are isomers of compound (1)?A) All are isomers of compound (1).B) None are isomers of compound (1).C) only (2) and (3)D) only (4)Answer: CDiff: 2Topic: Conceptual Problems

109) In the figure above, which are branched hydrocarbons?A) All are branched hydrocarbons.B) None are branched hydrocarbons.C) only (1) and (4)D) only (1), (2), and (4)Answer: DDiff: 2Topic: Conceptual Problems


110) Which of the compounds shown above is correctly identified by the name pentane according to the IUPAC system of naming compounds?A) allB) noneC) only (2)D) only (3)Answer: DDiff: 2Topic: Conceptual Problems

111) Which of the compounds shown above is correctly identified by the name 2-methylbutane?A) All are 2-methylbutane.B) noneC) only (1)D) only (1) and (4)Answer: DDiff: 2Topic: Conceptual Problems

112) Which of the compounds shown above is correctly identified by the name 3-methylbutane?A) allB) noneC) only (4)D) only (1) and (4)Answer: BDiff: 3Topic: Conceptual Problems

113) Which of the compounds shown above is correctly identified by the name 2, 2-dimethylpropane?A) allB) noneC) only (2)D) only (1), (2), and (4)Answer: CDiff: 3Topic: Conceptual Problems

114) Which of the compounds shown above is correctly identified by the name 3, 3-dimethylpropane?A) allB) noneC) only (4)D) only (1) and (4)Answer: BDiff: 3Topic: Conceptual Problems


115) What is the IUPAC name of the following alkane?

A) decaneB) 2, 4-dimethyloctaneC) 5, 7-dimethyloctaneD) 1, 1, 3-trimethylheptaneAnswer: BDiff: 3Topic: Conceptual Problems

116) What is the IUPAC name of the following alkane?

A) 2,5-dimethylhexaneB) octaneC) 1,1,4,4-tetramethylbutaneD) 1,1,4-trimethylpentaneAnswer: ADiff: 3Topic: Conceptual Problems


117) Which are isomers?

A) All are isomers.B) (1) and (2); (3) and (4)C) (1) and (3); (2) and (4)D) (1) and (4); (2) and (3)Answer: DDiff: 2Topic: Conceptual Problems


118) To which family does this organic compound belong?

A) alkaneB) alkeneC) alkyneD) areneAnswer: CDiff: 2Topic: Conceptual Problems


A) alkaneB) alkeneC) alkyneD) areneAnswer: BDiff: 2Topic: Conceptual Problems



A) alkaneB) alkeneC) alkyneD) areneAnswer: DDiff: 2Topic: Conceptual Problems


A) alkaneB) alkeneC) alkyneD) areneAnswer: ADiff: 2Topic: Conceptual Problems



A) alcoholB) aldehydeC) etherD) ketoneAnswer: DDiff: 2Topic: Conceptual Problems


A) alcoholB) aldehydeC) etherD) ketoneAnswer: ADiff: 2Topic: Conceptual Problems



A) alcoholB) aldehydeC) etherD) ketoneAnswer: BDiff: 2Topic: Conceptual Problems


A) alcoholB) aldehydeC) etherD) ketoneAnswer: CDiff: 2Topic: Conceptual Problems



A) amideB) amineC) carboxylic acidD) esterAnswer: CDiff: 2Topic: Conceptual Problems


A) amideB) amineC) carboxylic acidD) esterAnswer: ADiff: 2Topic: Conceptual Problems



A) amideB) amineC) carboxylic acidD) esterAnswer: BDiff: 2Topic: Conceptual Problems


A) amideB) amineC) carboxylic acidD) esterAnswer: DDiff: 2Topic: Conceptual Problems


130) Identify the functional groups in the following compound.

A) alcohol and ketoneB) alcohol, amine, and ketoneC) amine and carboxylic acidD) amine, hydroxide, and ketoneAnswer: CDiff: 2Topic: Conceptual Problems

131) Identify the functional groups in the following compound.

A) alcoholB) alcohol and aldehydeC) alcohol and ketoneD) aldehyde and hydroxideAnswer: BDiff: 3Topic: Conceptual Problems


132) Identify the carboxylic acid and alcohol from which the following ester was made.

A) CH3CO2H and CH3OHB) CH3CH2CO2H and CH3OHC) CH3CO2H and CH3CH2OHD) CH3CH2CO2H and CH3CH2OHAnswer: CDiff: 4Topic: Conceptual Problems

133) Identify the carboxylic acid and alcohol from which the following ester was made.

A) CH3CO2H and CH3CH2OHB) CH3CO2H and CH3CH2CH2OHC) CH3CH2CO2H and CH3CH2OHD) CH3CH2CO2H and CH3CH2CH2OHAnswer: CDiff: 4Topic: Conceptual Problems

134) The sum of the many organic reactions that occur in the cell is calledA) anabolism.B) catabolism.C) metabolism.D) none of theseAnswer: CDiff: 1Topic: Section 23.9 An Overview of Biological Chemistry


135) The reactions that generally release energy that is used to power living organisms are calledA) anabolic reactions.B) catabolic reactions.C) metabolic reactions.D) none of theseAnswer: BDiff: 1Topic: Section 23.9 An Overview of Biological Chemistry

136) The major final product of the four stages of catabolism isA) acetyl CoA.B) ATP.C) CO2.D) fatty acids.Answer: BDiff: 1Topic: Section 23.9 An Overview of Biological Chemistry

137) Which molecule is referred to as the "energy storehouse"?A) acetyl CoAB) ATPC) CO2 D) fatty acidsAnswer: BDiff: 1Topic: Section 23.9 An Overview of Biological Chemistry

138) Approximately what mass percent of a body's dry weight consists of proteins?A) 5%B) 25%C) 50%D) 72%Answer: CDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

139) In addition to an amine, which functional group do all amino acids contain?A) an alcoholB) an amideC) a carboxylic acidD) an oxyacidAnswer: CDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins


140) A peptide bond links A) an alcohol and a ketone.B) an amide and an aldehyde.C) an amine and a carboxylic acid.D) ATP and acetyl CoA.Answer: CDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

141) What does the term "alpha" amino acid mean?A) The amino group attaches to the carbon in the carboxyl group.B) The amino group attaches to the carbon next to the carboxylic acid group.C) The amino acid contains only one carbon atom.D) The amino acid contains only one carboxylic acid group.Answer: BDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

142) How many alpha amino acids commonly make up the different proteins found in humans?A) 4B) 20C) 100D) millionsAnswer: BDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

143) What does the term "essential" mean when referring to amino acids? These are the amino acids whichA) are necessary for digestion.B) are necessary for respiration.C) are synthesized in our bodies.D) we must obtain from our diet.Answer: DDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

144) Which is an amino acid nonpolar neutral side chain?A) –CH3B) –CH2OHC) –CH2CO2HD) –CH2CH2CH2CH2NH2Answer: ADiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins


145) Which is an amino acid polar neutral side chain?A) –CH3B) –CH2OHC) –CH2CO2HD) –CH2CH2CH2CH2NH2Answer: BDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

146) Which is an amino acid basic side chain?A) –CH3B) –CH2OHC) –CH2CO2HD) –CH2CH2CH2CH2NH2Answer: DDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

147) Which is an amino acid acidic side chain?A) –CH3B) –CH2OHC) –CH2CO2HD) –CH2CH2CH2CH2NH2Answer: CDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

148) Which one of the following amino acids does not contain a basic side chainA) arginineB) histidineC) lysineD) serineAnswer: DDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

149) Which of the following amino acids is acidic?A) alanineB) asparticC) glycineD) valineAnswer: BDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins


150) Which one of the following amino acids contains a polar side chain?A) alanineB) glycineC) serineD) valineAnswer: CDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

151) Which of the following amino acids contains a benzyl group?A) glycineB) isoleucineC) methionineD) phenylalanineAnswer: DDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

152) Which one of the amino acids contains a double ring structure?A) phenylalanineB) prolineC) tryptophanD) tyrosineAnswer: CDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

153) Which amino acid has the simplest structure?A) alanineB) glycineC) leucineD) valineAnswer: BDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

154) Which of the following amino acids contains a sulfur in its side chain?A) aspartic acidB) glutamic acidC) methionineD) threonineAnswer: CDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins


155) What does the term "hydrophobic" mean? A) water reactiveB) water repellingC) water solubleD) none of theseAnswer: BDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

156) Which one of the following amino acids contains a hydrophobic side chain?A) leucineB) serineC) threonineD) tyrosineAnswer: ADiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

157) All but one of the common amino acids contain a -NH2 amino group. Which one contains an -NH- amino group as part of a ring structure? A) phenylalanineB) prolineC) tryptophanD) tyrosineAnswer: BDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

158) Peptide bonds that link amino acids together in proteins contain the ________ functional group.A) amineB) amideC) esterD) ketoneAnswer: BDiff: 2Topic: Section 23.10 Amino Acids, Peptides, and Proteins

159) In the protein, Val-Tyr-His-Pro, which amino acid contains the N-terminal group?A) histidineB) prolineC) tyrosineD) valineAnswer: DDiff: 2Topic: Section 23.10 Amino Acids, Peptides, and Proteins


160) In the protein, Asn-Phe-Cys-Lys, which amino acid contains the C-terminal group?A) asparagineB) cysteineC) lysineD) phenylalanineAnswer: CDiff: 2Topic: Section 23.10 Amino Acids, Peptides, and Proteins

161) How many possible tripeptides can be made with the amino acids: tyrosine, histidine, and cysteine, each used only once?A) 3B) 4C) 6D) 9Answer: CDiff: 2Topic: Section 23.10 Amino Acids, Peptides, and Proteins

162) Which two amino acids form the dipeptide below?

A) asparagine and prolineB) glycine and cysteineC) serine and alanineD) threonine and valineAnswer: DDiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins


163) Which of the following notations represents the dipeptide shown below?

A) Phe-ThrB) Thr-PheC) Ser-TyrD) Tyr-SerAnswer: CDiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins

164) Which of the following notations represents the polypeptide shown below?

A) Gly-Ala-SerB) Gly-Val-ThrC) Ser-Ala-GlyD) Thr-Val-GlyAnswer: ADiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins


165) How many peptide bonds are present in the polypeptide shown below?

A) oneB) twoC) threeD) fourAnswer: BDiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins

166) A partial hydrolysis of a protein yielded the following fragments: Ser-Gly, Gly-Ala, Gly-Ala-Val, Val-Leu, Ala-Val. What is the sequence of amino acids in the polypeptide?A) Gly-Leu-Ser-Ala-ValB) Leu-Ala-Gly-Val-SerC) Ser-Gly-Ala-Val-LeuD) Val-Ala-Gly-Ser-LeuAnswer: CDiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins

167) Hemoglobin is a protein molecule which contains 4 iron atoms. If the mass percent of iron is 0.342%, what is the molar mass of hemoglobin?A) 1020 g/molB) 16,300 g/molC) 65,300 g/molD) none of theseAnswer: CDiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins

168) The term "carbohydrates" refers to a large class of polyhydroxylated A) alcohols and carboxylic acids.B) aldehydes and ketones.C) amines and amides.D) ethers and esters.Answer: BDiff: 1Topic: Section 23.11 Carbohydrates


169) Which suffix on a ketone or aldehyde indicates a sugar?A) -aneB) -eneC) -oneD) -oseAnswer: DDiff: 1Topic: Section 23.11 Carbohydrates

170) The monosaccharide shown below is a(n)

A) aldohexose.B) aldopentose.C) ketohexose.D) ketopentose.Answer: ADiff: 2Topic: Section 23.11 Carbohydrates

171) The monosaccharide shown below is a(n)

A) aldohexose.B) aldopentose.C) ketohexose.D) ketopentose.Answer: CDiff: 2Topic: Section 23.11 Carbohydrates


172) What class of compounds are cyclic?A) DNAB) lipidsC) monosaccharidesD) proteinsAnswer: CDiff: 2Topic: Section 23.11 Carbohydrates

173) In water, which form of glucose predominates?A) cyclic αB) cyclic βC) open chainD) All three are equal in solution.Answer: BDiff: 1Topic: Section 23.11 Carbohydrates

174) When crystallized, which form of glucose predominates?A) cyclic αB) cyclic βC) open chainD) All three are equal in crystals.Answer: ADiff: 1Topic: Section 23.11 Carbohydrates

175) Sucrose, common table sugar, when hydrolyzed will formA) amylose and glycogen.B) cellulose and starch.C) glucose and fructose.D) lactose and maltose.Answer: CDiff: 1Topic: Section 23.11 Carbohydrates

176) Cellulose is a polymer consisting of thousands ofA) α-glucose molecules.B) β-glucose molecules.C) long chain fatty acids.D) amino acids.Answer: BDiff: 1Topic: Section 23.11 Carbohydrates


177) Which substance is a monosaccharide?A) celluloseB) glucoseC) glycogenD) starchAnswer: BDiff: 1Topic: Section 23.11 Carbohydrates

178) Lipids are characterized by what property?A) chemical reactivityB) chemical structureC) refractive indexD) solubilityAnswer: DDiff: 1Topic: Section 23.12 Lipids

179) Which statement below regarding fatty acids is not correct? Fatty acidsA) are always liquids.B) are long chain carboxylic acids.C) are usually unbranched chains.D) usually have an even number of carbon atoms.Answer: ADiff: 2Topic: Section 23.12 Lipids

180) All of the fatty acids below contain eighteen carbons and range from saturated to three double bonds. Which has the highest melting point?A) stearic acid (saturated)B) oleic acid (one double bond)C) linoleic acid (two double bonds)D) linolenic acid (three double bonds)Answer: ADiff: 2Topic: Section 23.12 Lipids

181) What functional group is commonly found in fats?A) –NH2B) –OHC) –C–O–CD) O

–O–C–C–Answer: DDiff: 2Topic: Section 23.12 Lipids


182) Which one of the following amine bases does not appear in DNA?A) adenineB) cytosineC) guanineD) uracilAnswer: DDiff: 1Topic: Section 23.13 Nucleic Acids

183) The one cyclic amine base that occurs in DNA but not in RNA is A) cystine.B) guanine.C) thymine.D) uracil.Answer: CDiff: 1Topic: Section 23.13 Nucleic Acids

184) Which of the following is not part of a nucleotide?A) cyclic amine baseB) fatty acidC) phosphoric acidD) a sugarAnswer: BDiff: 1Topic: Section 23.13 Nucleic Acids

185) The attractive force between the cylic amine bases in DNA isA) disulfide bridges.B) hydrogen bonding.C) hydrophobic stacking.D) ionic interactions of salt bridges.Answer: BDiff: 1Topic: Section 23.13 Nucleic Acids

186) What is the sugar component in RNA called?A) fructose B) galactoseC) glucoseD) riboseAnswer: DDiff: 1Topic: Section 23.13 Nucleic Acids


187) What is the backbone of the nucleic acid constructed of?A) alternating sugar phosphate groupsB) amine basesC) glucose polymersD) polyamidesAnswer: ADiff: 2Topic: Section 23.13 Nucleic Acids

188) The nucleotide sequence, T-A-G, stands forA) threonine-alanine-glutamine.B) thymine-adenine-guanine.C) tyrosine-asparagine-glutamic acid.D) None of theseAnswer: BDiff: 2Topic: Section 23.13 Nucleic Acids

189) Which of the following bases pairs with adenine in DNA?A) cytosineB) guanineC) thymineD) uracilAnswer: CDiff: 2Topic: Section 23.13 Nucleic Acids

190) What is the complementary DNA sequence to ATATGGTC?A) CGCGTTGAB) GCGCAACTC) TATACCAGD) TUTUCCAGAnswer: CDiff: 3Topic: Section 23.13 Nucleic Acids

191) What is the complementary mRNA sequence to GCTATACCGT?A) ATCGCGTTACB) CGAUAUGGCAC) TUGCGCUUTGD) UTCGCGTTUCAnswer: BDiff: 3Topic: Section 23.13 Nucleic Acids


192) The base sequences in mRNA that code for particular amino acids are Trp: UGG, Phe: UUU, and Glu: GAA. What is the peptide that is produced from the DNA sequence: CTTACCAAA?A) Glu-Phe-TrpB) Glu-Trp-PheC) Phe-Trp-GluD) Trp-Glu-PheAnswer: BDiff: 4Topic: Section 23.13 Nucleic Acids

193) The process of forming mRNA from DNA is calledA) metamorphosis.B) replication.C) transcription.D) translation.Answer: CDiff: 1Topic: Section 23.13 Nucleic Acids

194) Transfer-RNA is involved inA) replication.B) transcription.C) translation.D) none of theseAnswer: CDiff: 1Topic: Section 23.13 Nucleic Acids


195) Identify the amino acid shown below.

A) Alanine (Ala)B) Glycine (Gly)C) Isoleucine (Ile)D) Leucine (Leu)Answer: DDiff: 3Topic: Conceptual Problems


A) Alanine (Ala)B) Glycine (Gly)C) Isoleucine (Ile)D) Leucine (Leu)Answer: BDiff: 3Topic: Conceptual Problems



A) Alanine (Ala)B) Glycine (Gly)C) Isoleucine (Ile)D) Leucine (Leu)Answer: ADiff: 2Topic: Conceptual Problems



A) Alanine (Ala)B) Glycine (Gly)C) Isoleucine (Ile)D) Leucine (Leu)Answer: CDiff: 2Topic: Conceptual Problems



A) Methionine (Met)B) Phenylalanine (Phe)C) Proline (Pro)D) Tryptophan (Trp)Answer: CDiff: 2Topic: Conceptual Problems



A) Methionine (Met)B) Phenylalanine (Phe)C) Proline (Pro)D) Tryptophan (Trp)Answer: ADiff: 2Topic: Conceptual Problems



A) Methionine (Met)B) Phenylalanine (Phe)C) Proline (Pro)D) Tryptophan (Trp)Answer: DDiff: 2Topic: Conceptual Problems



A) Methionine (Met)B) Phenylalanine (Phe)C) Proline (Pro)D) Tryptophan (Trp)Answer: BDiff: 2Topic: Conceptual Problems


A) Cysteine (Cys)B) Serine (Ser)C) Threonine (Thr)D) Tyrosine (Tyr)Answer: CDiff: 2Topic: Conceptual Problems



A) Cysteine (Cys)B) Serine (Ser)C) Threonine (Thr)D) Tyrosine (Tyr)Answer: BDiff: 2Topic: Conceptual Problems


A) Cysteine (Cys)B) Serine (Ser)C) Threonine (Thr)D) Tyrosine (Tyr)Answer: DDiff: 2Topic: Conceptual Problems



A) Cysteine (Cys)B) Serine (Ser)C) Threonine (Thr)D) Tyrosine (Tyr)Answer: ADiff: 2Topic: Conceptual Problems


A) Asparagine (Asn)B) Aspartic acid (Asp)C) Glutamic acid (Glu)D) Glutamine (Gln)Answer: ADiff: 2Topic: Conceptual Problems



A) Asparagine (Asn)B) Aspartic acid (Asp)C) Glutamic acid (Glu)D) Glutamine (Gln)Answer: DDiff: 2Topic: Conceptual Problems


A) Asparagine (Asn)B) Aspartic acid (Asp)C) Glutamic acid (Glu)D) Glutamine (Gln)Answer: BDiff: 2Topic: Conceptual Problems



A) Asparagine (Asn)B) Aspartic acid (Asp)C) Glutamic acid (Glu)D) Glutamine (Gln)Answer: CDiff: 2Topic: Conceptual Problems


A) Arganine (Arg)B) Histidine (His)C) Lysine (Lys)D) Valine (Val)Answer: DDiff: 2Topic: Conceptual Problems



A) Arganine (Arg)B) Histidine (His)C) Lysine (Lys)D) Valine (Val)Answer: CDiff: 2Topic: Conceptual Problems


A) Arganine (Arg)B) Histidine (His)C) Lysine (Lys)D) Valine (Val)Answer: BDiff: 2Topic: Conceptual Problems



A) Arganine (Arg)B) Histidine (His)C) Lysine (Lys)D) Valine (Val)Answer: ADiff: 2Topic: Conceptual Problems

215) Based on the structure of its side chains, the amino acid shown below can be classified as

A) acidic.B) basic.C) neutral, non-polar.D) neutral, polar.Answer: CDiff: 2Topic: Conceptual Problems





















A) acidic.B) basic.C) neutral, non-polar.D) neutral, polar.Answer: DDiff: 2Topic: Conceptual Problems













A) acidic.B) basic.C) neutral, non-polar.D) neutral, polar.Answer: ADiff: 2Topic: Conceptual Problems


A) acidic.B) basic.C) neutral, non-polar.D) neutral, polar.Answer: ADiff: 2Topic: Conceptual Problems





A) acidic.B) basic.C) neutral, non-polar.D) neutral, polar.Answer: BDiff: 2Topic: Conceptual Problems







234) Is the following model of glucose in the α form or the β form?

A) α formB) β formAnswer: ADiff: 4Topic: Conceptual Problems

235) Is the following model of glucose in the α form or the β form?

A) α formB) β formAnswer: BDiff: 4Topic: Conceptual Problems


236) Identify the following dipeptide.

A) Ser-AlaB) Ser-LeuC) Ser-PheD) Ser-ValAnswer: ADiff: 4Topic: Conceptual Problems


237) Identify the following dipeptide.

A) Ser-AlaB) Ser-LeuC) Ser-PheD) Ser-ValAnswer: DDiff: 4Topic: Conceptual Problems


238) Identify the following amine base found in nucleic acids.

A) Adenine (A)B) Cytosine (C)C) Thymine (T)D) Uracil (U)Answer: CDiff: 2Topic: Conceptual Problems


A) Adenine (A)B) Cytosine (C)C) Thymine (T)D) Uracil (U)Answer: ADiff: 2Topic: Conceptual Problems



A) Adenine (A)B) Cytosine (C)C) Thymine (T)D) Uracil (U)Answer: DDiff: 2Topic: Conceptual Problems


A) Adenine (A)B) Cytosine (C)C) Thymine (T)D) Uracil (U)Answer: BDiff: 2Topic: Conceptual Problems


23.2 Algorithmic Questions

1) How many isomers are there for C5H12 ? A) 3B) 4C) 5D) 6Answer: ADiff: 3Topic: Section 23.1 Organic Molecules and Their Structures: AlkanesAlgo. Option: algorithmic

2) When octane, , reacts with oxygen to produce carbon dioxide and water, 5070 kJ of heat are released per mole of hydrocarbon. How many kJ of heat are released per gram of oxygen used?A) 6.34 kJ/gB) 12.7 kJ/gC) 1980 kJ/gD) 3960 kJ/gAnswer: BDiff: 3Topic: Section 23.1 Organic Molecules and Their Structures: AlkanesAlgo. Option: algorithmic

3) Which compound is not a saturated hydrocarbon? A) 1-butyneB) cyclohepteneC) 3-methylheptaneD) 2-heptyneAnswer: CDiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and AlkynesAlgo. Option: algorithmic

4) Which one of the following molecules is the most polar? A) butaneB) butanoic acidC) cyclohexaneD) ethanolAnswer: BDiff: 3Topic: Section 23.8 Carbonyl CompoundsAlgo. Option: algorithmic


5) Which one of the following amino acids does not contain a basic side chain?A) arginineB) histidineC) lysineD) threonineAnswer: DDiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins

6) Which one of the following amino acids contains a polar side chain?A) alanineB) glycineC) threonineD) valineAnswer: CDiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins

7) Which one of the following amino acids contains a hydrophobic side chain?A) valineB) histidineC) glutamineD) glutamic acidAnswer: ADiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins

8) In the protein, His-Tyr-Val-Pro, which amino acid contains the N-terminal group?A) valineB) tyrosineC) prolineD) histidineAnswer: DDiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins

9) In the protein, Arg-Pro-Leu-Gln, which amino acid contains the C-terminal group?A) prolineB) leucineC) glutamineD) arginineAnswer: CDiff: 3Topic: Section 23.10 Amino Acids, Peptides, and Proteins


23.3 Short Answer Questions

1) In organic molecules the molecular geometry exhibited by carbon is ________ when carbon is bonded to four atoms by four single bonds, ________ when carbon is bonded to three atoms by one double bond and two single bonds, and ________ when carbon is bonded to two atoms by one triple bond and one single bond.Answer: tetrahedral, trigonal planar, linearDiff: 1Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

2) Do the two condensed structures (1) and (2) below represent the same or different molecules?CH3 CH3 CH3

| | |CH3CHCH2CHCH3 CH3CHCH2CHCH3

|CH3

(1) (2)Answer: Condensed structures (1) and (2) represent the same molecule.Diff: 2Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

3) Do the condensed structures shown below represent the same or different molecules?

(1) CH3CH2CH2CH2CH(CH3)2

(2) CH3|

CH3CHCH2CH2CH2CH3Answer: Condensed structures (1) and (2) represent the same molecule.Diff: 2Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

4) Organic molecules containing only carbon and hydrogen and having only single bonds are called ________ hydrocarbons, or ________.Answer: saturated, alkanesDiff: 2Topic: Section 23.2 Families of Organic Compounds: Functional Groups

5) The condensed structures for the two isomers of C4H10 are (1) ________ and (2) ________.Answer: (1) CH3CH2CH2CH3

(2) CH3|

CH3CHCH3Diff: 3


Topic: Section 23.1 Organic Molecules and Their Structures: Alkanes

6) The alkane, 3-ethyl-3-methylhexane contains ________ carbon atoms and ________ hydrogen atoms. Answer: 9, 20Diff: 2Topic: Section 23.3 Naming Organic Compounds

7) What is the empirical and molecular formulas of 1-tert-butyl-2-methylcyclopropane?Answer: CH2, C8H16Diff: 3Topic: Section 23.3 Naming Organic Compounds

8) The IUPAC name for the alkane shown below is ________.

CH3|

CH3CHCH2CH2CH2CH3

Answer: 2-MethylhexaneDiff: 2Topic: Section 23.3 Naming Organic Compounds

9) In the dark the reaction of 2-pentene with chlorine will form how many different products? Answer: 1Diff: 4Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

10) The molecules CH3CH2CH2CH2C CH and CH3CH2CH2CH2CH=CH2, respectively, belong to the ________ family and the ________ family of organic molecules.Answer: alkyne, alkeneDiff: 2Topic: Section 23.4 Unsaturated Organic Compounds: Alkenes and Alkynes

11) The cycloalkane represented by a hexagon is named ________ and has the molecular formula ________.Answer: cyclohexane, C6H12Diff: 2Topic: Section 23.5 Cyclic Organic Compounds

12) When toluene C6H5CH3 is reacted with Br2/FeBr3, the number of different products that can be formed is ________. Answer: 3Diff: 4Topic: Section 23.6 Aromatic Compounds


13) The molecule H2NCH2CH2CH2OH contains an ________ functional group and an ________ functional group.Answer: amine, alcoholDiff: 2Topic: Section 23.7 Alcohols, Ethers, and Amines

14) The condensed formula of the smallest molecule that contains the ether functional group is ________.Answer: CH3OCH3Diff: 3Topic: Section 23.7 Alcohols, Ethers, and Amines

15) The molecule CH3CH2CO2CH2CO2H contains an ________ functional group and a ________ functional group.Answer: ester, carboxylic acidDiff: 2Topic: Section 23.8 Carbonyl Compounds

16) In living cells reaction sequences that break molecules apart are known as ________, while reaction sequences in which larger molecules are created are known as ________.Answer: catabolism, anabolismDiff: 1Topic: Section 23.9 An Overview of Biological Chemistry

17) The amide bonds that form when two or more amino acids link together are called ________ bonds.Answer: peptideDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

18) Individual amino acids that make up a protein are called ________.Answer: residuesDiff: 1Topic: Section 23.10 Amino Acids, Peptides, and Proteins

19) Monosaccharides are classified as either ________ or ________.Answer: aldoses, ketosesDiff: 2Topic: Section 23.11 Carbohydrates

20) Naturally occurring organic molecules that dissolve in nonpolar solvents are called ________ of which the most plentiful in nature are ________ and ________.Answer: lipids, animal fats, vegetable oilsDiff: 2Topic: Section 23.12 Lipids


21) The four cyclic amine bases that occur in DNA are ________, ________, ________, and ________.Answer: adenine, guanine, cytosine, thymineDiff: 1Topic: Section 23.13 Nucleic Acids

22) ________ is the means by which information in DNA is transferred to and decoded by RNA. ________ is the means by which RNA uses information to build proteins.Answer: transcription, translationDiff: 1Topic: Section 23.13 Nucleic Acids


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Chapter 23 Review Questions