ch015

Chapter 15 Organic Compounds and the AtomicProperties of Carbon Student: ______________________________________________________________________ 1. Select the correct name for this compound. A. B. C. D. E. 2. 1,1,3-triethyl-2-methylbutane 1,1-diethyl-2,3-dimethylpentane 2,4-diethyl-3-methylhexane 3-ethyl-4,5-dimethylheptane None of these choices is correct. Select the correct name for this compound. A. B. C. D. E. 2-isopropyl-2,3,4-trimethylbutane 2-isopropyl-2,3-dimethylpentane 2,3,3,4-tetramethylhexane 1,1,2,2,3-pentamethylpentane None of these choices is correct. 3. Select the correct name for this compound. A. B. C. D. E. 4. Select the correct name for this compound. A. B. C. D. E. 5. 1,2-diethyl-1-methyl-3-propyl-4-isobutylhexane 1,6,6-trimethyl-1,2,4-triethyl-3-propylhexane 1,1,6-trimethyl-3,5,6-triethyl-4-propylhexane 4,6-diethyl-2,7-dimethyl-5-propylnonane 3,5-diethyl-1,1,6-trimethyl-4-propyloctane 2,4,5-tripropylheptane 6-methyl-3,4-dipropylnonane 4-ethyl-5,7-dipropyloctane 5-ethyl-2,4-dipropyloctane 4-ethyl-7-methyl-5-propyldecane Select the correct name for the following compound. A. B. C. D. E. ortho-dipropylcyclopentylhexane 2,3-dipropylcyclopentylhexane 2-hexyl-1,5-dipropylcyclopentane 1-hexyl-2,3-dipropylcyclopentane 1,2-dipropyl-3-hexylcyclopentane 6. Select the correct name for this compound. A. B. C. D. E. 7. Select the correct name for the following compound. A. B. C. D. E. 8. ortho-ethylheptylcyclopentane meta-ethylheptylcyclopentane 1-ethyl-2-heptylcyclopentane ethylcyclopentylheptane ortho-ethylheptylbenzene 1-ethyl-3-methylcyclohexane 1-methyl-5-ethylcyclohexane meta-ethylmethylcyclohexane meta-ethylmethylbenzene 3-ethyltoluene Select the correct name for this compound. A. B. C. D. E. cis-2-methyl-4-heptene trans-2-methyl-4-heptene cis-6-methyl-3-heptene trans-6-methyl-3-heptene cis-2-methyl-3-heptene 9. Select the correct name for this compound. A. B. C. D. E. cis-3-ethyl-2,6-dimethyl-6-propyl-4-nonene trans-3-ethyl-2,6-dimethyl-6-propyl-4-nonene cis-7-ethyl-4,8-dimethyl-4-propyl-5-nonene trans-7-ethyl-4,8-dimethyl-4-propyl-5-nonene None of these choices is correct. 10. Select the correct name for this compound. A. B. C. D. E. cis-2-methyl-2,3-dipropyl-4-octene cis-7-methyl-6,7-dipropyl-4-octene cis-4,4-dimethyl-5-propyl-6-decene trans-7,7-dimethyl-6-propyl-4-decene cis-7,7-dimethyl-6-propyl-4-decene A. C.3-dimethyl-4-hexene trans-2.5-dimethyl-2-hexene trans-4. E.6-diethyl-3-methyl-6-nonene 4. A.5-dimethyl-2-hexene trans-4. A. cis-2.5-diethyl-6-methyl-3-nonene 13. E.5-diethyl-6-methyl-3-nonene cis-4. 2-ethyl-3-pentene 4-ethyl-2-pentene 3-methyl-4-hexene 4-methyl-2-hexene None of these choices is correct. Select the correct name for this compound. . C. B. D.11. Select the correct name for this compound. cis-2. E. D. D. B. C. B.6-diethyl-3-methyl-6-nonene trans-2.5-diethyl-6-methyl-3-nonene 2.3-dimethyl-4-hexene cis-4. Select the correct name for the following compound.5-dimethyl-2-heptene 12. D. 1. A. D. 1. D. A. C. Select the correct name for this compound. E. C. A. 1-butyl-4-pentyl-3-propylcyclohexene 1-butyl-4-pentyl-5-propylcyclohexene 2-butyl-5-pentyl-6-propylcyclohexene 4-butyl-1-pentyl-2-propylcyclohexene 1-butyl-4-pentyl-3-propylbenzene 16.5-dimethyl-5-cyclopentyl-3-pentane 5. E.4-octene 15. C.5-dimethyl-5-cyclopentyl-3-pentene .14.1-dimethyl-1-cylcopentyl-2-pentane 1.1-dimethyl-2-hexene-cyclopentane 2-cyclopentyl-2-methyl-3-hexene 5. B. B.1-diethyl-3-butyl-3-hexene 5-butyl-3-ethyl-5-octene 4-butyl-6-ethyl-3-octene 3-ethyl-5-propyl-5-nonene 4-butyl-6-ethyl-3. Select the correct name for this compound. Select the correct name for the following compound. E. B. 2-ethyl-4-propylcycloheptene 3-ethyl-5-propylcycloheptene 6-ethyl-4-propylcycloheptene 7-ethyl-5-propylcycloheptene 3-ethyl-5-propylcyclohexene 18. A.5-diethyl-1. A. D.5-trimethyl-2-heptyne 4.6-dimethyl-3-octene 3-ethyl-3.1.6-dimethyl-3-octyne . Select the correct name for this compound. E. 4-ethyl-1. E. Select the correct name for this compound. C. D.17.1-dimethyl-2-heptyne 5-ethyl-2. B. B. C.7-dimethyl-5-octyne 5-ethyl-2. C. E. C. Select the correct name for this compound.4-dimethyl-3-propyl-1-heptene 5-ethyl-4-4-dimethyl-3-propyl-1-nonyne 5-ethyl-6-6-dimethyl-7-propyl-8-nonyne 4. 5-butyl-4. D.19. B.6-diethyl-5-5-dimethyl-4-decyne 5-ethyl-4-4-dimethyl-3-propyl-1-nonene 20. 4-4-diethyl-2-pentyne 2. A. A.2-diethyl-3-pentyne 2-ethyl-2-methyl-4-hexyne 4-ethyl-4-methyl-2-hexyne 2-ethyl-2-methyl-4-hexene . E. Select the correct name for this compound. D. B. E.5-dimethyl-3-octyne 3-cyclobutyl-4. D. E. D. B. C. B. Select the correct name for this compound.7-dimethyl-5-octene 22. B. meta-chloroethylcyclohexene 1-chloro-5-ethylcyclohexene meta-chloroethylbenzene 1-chloro-5-ethylbenzene 1-chloro-3-ethylcyclohexane 23. 2. A.21. A. 1-chloro-2-ethyl-3-propylcyclohexane 1-chloro-2-ethyl-3-propylcyclohexene 1-chloro-ortho-ethylpropylbenzene 1-chloro-meta-ethylpropylbenzene 1-chloro-2-ethyl-3-propylbenzene . D.7-dimethyl-5-octyne 6-cyclobutyl-2. E.5-dimethyl-3-octyne-6-cyclobutane 4-cyclobutyl-1-isopropyl-3-methyl-1-hexyne 3-cyclobutyl-4. Select the correct name for this compound. C. C. Select the correct name for this compound. A. 4-dibromocyclohexene 1. ortho-dibromobenzene meta-dibromobenzene para-dibromobenzene 1. Select the correct name for this compound.24. Select the correct name for this compound. D. D. B. A. Select the correct name for this compound. para-bromochloro-2-ethylbenzene 4-bromo-1-chloro-2-ethylbenzene 5-bromo-2-chloro-1-ethylbenzene 1-bromo-4-chloro-3-ethylcyclohexene 4-bromo-1-chloro-2-ethylcyclohexane . E. A. C. E. D. E.4-dibromocyclohexane 26. C. C. B. A. ortho-butylethylbenzene meta-butylethylbenzene para-butylethylbenzene 1-butyl-2-ethylcyclohexene 1-butyl-2-ethylcyclohexane 25. B. D. D.4-diethyl-2-pentanol 3-ethyl-4-methyl-2-hexanol 3-ethyl-4-methyl-2-hexanal 28. B. Select the correct name for this compound. 1 carbon atom and 4 hydrogen atoms 30. C19H38 E.4-trimethyl-1-butanol 2. Select the correct name for this compound. 1 carbon atom B. 2 hydrogen atoms D.3.3-diethyl-4-pentanol 3. E.3-dimethyl-1-pentanol 3.27. C. 3-ethyl-2. A. B.3-dimethyl-4-cyclopentyl-5ethyldecane? A. What is the molecular formula of the compound 2. What is the difference between 1-butyne and 1-butene? A.3-dimethyl-1-pentanal . C20H40 29.3-dimethyl-1-propanol 2. C18H36 D. C16H34 B.4-dimethyl-5-pentanol 2. 4 hydrogen atoms E. A. 3. E. C17H34 C. 1 carbon atom and 2 hydrogen atoms C. C.4-diethyl-4-methyl-2-butanol 2. if any. B. will be optically active? A. E. . C. D.31. Which compound. None of these choices is optically active. Excluding cyclic compounds. if any. 33. 4 C. how many possible isomers exist for C4H8? A. 7 34. 6 E. same number of double bonds . 4 C. Which of the following features do cyclohexene and 3-methyl-1-pentyne have in common? A. 2 B. Including cyclic compounds. B. how many possible isomers exist for C4H8? A. C. 2 B. They are all optically active. E. 5 D. 7 35. Which compound. 5 D. D. same physical properties B. 6 E.32. same boiling point D. same molecular weight E. will not be optically active? A. same chemical properties C. E. addition elimination substitution oxidation reduction . D. substitution 37. dehydration B. substitution B. oxidation to form an aldehyde or a carboxylic acid 38. Alcohols undergo a variety of reactions. addition elimination substitution oxidation reduction 39. Which one of the following reactions is not undergone by the alcohol functional group? A. C. A. dehydroxylation C. B. D. CH3CH2CH2CH2OH + HBr  CH3CH2CH2CH2Br + H2O A. E. Select the correct reaction type for the following process. elimination E. C. addition D. Benzene will react with chloromethane in the presence of a catalyst to produce toluene and hydrogen chloride. oxidation to form a ketone E. A. addition C. Select the correct reaction type for the process. Select the correct type for the following reaction.36. dehydration D. B. 40. 2-chloro-2. C. A. D. addition elimination substitution oxidation displacement 42. D.3-dimethyl-2-butene. The reaction of bromine with an alkene such as cyclopentene is a good laboratory test for the presence of a double bond in a compound. B. E. E. C. D. addition elimination substitution displacement reduction 41. addition elimination substitution oxidation dehydrogenation .3-dimethylbutane will react with potassium hydroxide dissolved in alcohol to produce 2. E. C. What type of reaction is it? A. What type of reaction is this? A. Select the correct type for the following reaction. B. B. Select the correct type for the following reaction. D. B. D. D. E. A. B. C. A.43. aldehyde ketone alcohol ester carboxylic acid . E. A. E. addition elimination substitution oxidation reduction 45. C. Select the correct type for the following reaction. B. addition elimination carbonylation dehydration oxidation 44. Identify the functional group circled. C. C. C. D. Vanillin is a flavoring agent which occurs naturally in the vanilla bean. aldehyde ketone alcohol carboxylic acid oxide 48. Identify the functional group circled. Aspirin is an effective and widely used pain reliever. A. E. B. E.46. D. C. One source of a musky odor in perfumes is civetone. Identify the functional group circled. B. A. a compound extracted from the scent gland of the civet cat. Identify the functional group circled. D. B. aldehyde ketone ester carboxylic acid carbonyl . E. the seed of an orchid. A. aldehyde ketone alcohol carboxylic acid carbonyl 47. aldehyde ketone ester ether alcohol 50. Glycerin is used in cosmetics as a moisturizer. B. Identify the functional group circled. C. E. B.49. Enflurane is an effective gaseous anesthetic with relatively low flammability. a derivative of anise. C. D. B. E. A. C. Anethole. D. aldehyde ketone alcohol ester ether 51. A. A. E. is used in flavoring and as perfume in soap and toothpaste. Identify the functional group circled. D. Identify the functional group circled. carboxylic acid alcohol ester ether aldehyde . E. The compound shown below is responsible for the odor in rancid butter. D. B. aldehyde ketone alcohol ester carboxyl 54. D. E. aldehyde ketone alcohol ester carboxylic acid 53. A. Testosterone is a male hormone. A. B. Identify the functional group circled. C. Identify the functional group circled. Glucose is an important sugar in a person's metabolic cycle. B. D. A. Identify the functional group circled.52. C. E. C. aldehyde ketone alcohol carboxylic acid carbonyl . Identify the functional group circled. Identify the functional group circled. B. Serotonin transmits nerve impulses through the body. A. C. E. E. aldehyde ketone ester carboxylic acid carbonyl 56. C. aldehyde ketone amide nitrile amine 57. D. Putrescine is produced during the decay and protein breakdown of meats and is responsible for some of the odor found in them. aldehyde alcohol amide amine nitride . A.55. A. Benzocaine is from a family of chemicals that are good local anesthetics. C. B. D. B. D. Identify the functional group circled. E. D. E.58. Acetominophen is a widely used and an effective pain reliever. B. E. aldehyde alcohol carboxyl amine amide 60. The millipede ejects the compound shown below to protect itself from its enemies. C. Identify the functional group circled. Urea carries waste nitrogen from the body in urine. C. D. A. A. E. B. D. aldehyde alcohol amide amine carbonyl 59. A. nitrile alcohol amide amine nitro . Identify the functional group circled. Identify the functional group circled. B. C. Which one of the following classes of organic compound does not contain the carbonyl (C O) group? A. aldehydes B. E. C. ketones D. A. B. alcohols E. the claims were never scientifically verified. D. carboxylic acids C.61. B. Identify the principal organic product of the reaction between butane and chlorine. . C. CH3Cl CH3CH2Cl CH3CHClCH3 CH3CH2CHClCH3 None of these choices is a major product of the reaction. Amygdalin (Laetrile) was once touted for its potential anticancer activity. carbonite ether amide amine nitrile 62. esters 63. D. Identify the functional group circled. However. E. A. 64. Identify the principal organic product when benzyl chloride reacts with aqueous sodium hydroxide. E. . A. C. None of these choices is correct. D. B. . A. D. C. None of the above pairs of compounds is formed in the reaction. B. D. E. A. C. None of these choices is correct. Identify the products of the following reaction. E. 66.65. Identify the two principal products of the reaction between ammonia and ethyl propionate. B. Identify the products for the reaction between cycloheptene and bromine. None of these choices is among the products of the reaction. 68. B. C. A. E. E. D. D. . A. Identify the products of the reaction of 3-octene with chlorine.67. C. B. Identify the principal organic products for the following reaction. A. C. E. C.69. B. A. . D. D. None of these choices is among the principal organic products of the reaction. B. E. None of these choices is among the products of the reaction. 70. Identify the products of the reaction between 2-bromopentane and potassium ethoxide. E. A.71. Identify the organic product when cyclohexanol reacts with excess potassium dichromate in the presence of sulfuric acid. None of these choices is the organic product of the reaction. C. . E. Identify the organic product when 3-cylcobutyl-1-propanol reacts with excess potassium dichromate in sulfuric acid. None of these choices is the organic product of the reaction. 72. D. A. B. B. C. D. B. Identify the organic product for the reaction of 2-pentanol with sulfuric acid. B. None of these choices is the organic product of the reaction. Teflon C. the ability to form free radicals. 74. the presence of pi bonds. D. polypropylene E. Dacron . Which of the following polymers is a condensation polymer? A. polyvinylchloride D. E. C.73. B. C. C. D. A. A. One characteristic of the monomers that form condensation polymers that is not common in monomers which form addition polymers is A. None of these choices is the organic product of the reaction. E. the presence of two functional groups. the presence of sulfur atoms. polystyrene B. 75. the presence of alkyl side chains. D. E. 76. Identify the organic product when cyclopentanol reacts with sulfuric acid. polyamide. the RNA base sequence. and the DNA base sequence are interrelated. B.77. The DNA base sequence determines the RNA base sequence which. polyamide. determines the protein amino acid sequence. in turn. addition B. C. glucose. D. C. an amine with a diacid. polyene. D. determines the DNA base sequence. Helical and sheet-like segments in proteins arise from A. crosslinking via covalent bonds. salt bridges. A. carboxyl and peptide. D. in turn. condensation C. polyester. cellulose. The protein amino acid sequence. C. 82. E. Nylon-type compounds are prepared by the reaction of A. D. carbonate. 78. B. B. None of these choices is correct. E. addition 79. Dacron is a ___________ compound and is produced by a __________ reaction. alcohol and amine. determines the protein amino acid sequence. B. ester and amine. . a diamine with an acid. dispersion forces within the protein's interior. a diamine with a diacid. The RNA base sequence determines the DNA base sequence which. 80. B. E. a diol with a diacid. The DNA base sequence determines the protein amino acid sequence which. in turn. E. polyester. determines the RNA base sequence. C. 81. Which of the following descriptions is correct? A. disulfide bridges. hydrogen bonding. an alcohol with a diacid. glycogen. The RNA base sequence determines the protein amino acid sequence which. Each amino acid has two functional groups in common and one of 20 other groups attached to the -carbon. C. carboxyl and amine. The two functional groups are A. in turn. D. starch. The most abundant organic chemical on earth is A. E. condensation E. addition D. carboxyl and amide. 85. Draw the structure of trans-5-methyl-3-heptene. Draw and name all stable molecules with the formula C5H12. Name the compound with the molecular structure shown. Draw and name four alkenes with the formula C4H8. 87. 84. . 86.83. Draw and name two non-alkenes with the formula C4H8. Which one will have the higher boiling point. a. what is the general requirement for a molecule to be optically active? 91. In one sentence.88. c. an alkane capable of having structural isomers? b. Name the functional group in each structure. b. an alkane capable of having optical isomers? c. What is the simplest molecular formula for a. and why? . an alkene capable of having geometrical isomers? 90. Name these compounds: 89. Draw two different structures with the molecular formula C2H6O. 92. Name each of the following functional groups: . Write down the structure of the missing organic reactant or product(s) in the following reactions. and name the type of reaction involved (inorganic products may also be formed): 94.93. Describe and contrast fibrous and globular proteins in terms of their amino acid composition. their structure and their function. . how many different code words are possible using a 3-base sequence and the bases available in DNA? 100. Name the three component parts of a nucleotide. Difficulty: E True False .95. 96. their properties are governed by fundamentally different chemical principles from those of inorganic compounds. 98. Explain how a salt bridge can arise a protein molecule. Explain what is meant by "complementary" in the context of DNA strands. 99. 97. Explain how a disulfide bridge can arise a protein molecule. Because organic compounds are associated with living organisms. Given that each 3-base sequence in DNA is a "code word" for a particular amino acid. 3-cyclopentadiene are identical. All the atoms in a molecule of benzene lie in the same plane. Difficulty: E True False 106. Because of delocalization. Difficulty: M True False 104. As a result of delocalization of the pi-electrons. Difficulty: M True False 111. Difficulty: M True False . Difficulty: E True False 108. all the carbon-carbon bonds in benzene are identical. A characteristic reaction of alkanes is addition. Difficulty: E True False 107. A characteristic reaction of alkenes is addition. Difficulty: E True False 109. Both alkenes and alkynes exhibit geometric (cis/trans) isomerism. All alcohols are capable of hydrogen bonding. all the carbon-carbon bond lengths in 1.101. Ethane (C2H6) is much more reactive than disilane (Si2H6). A characteristic reaction of haloalkanes is substitution. All ketone molecules are capable of hydrogen bonding to other ketone molecules. Difficulty: E True False 105. The carbon atoms in a molecule of cyclohexane lie in the same plane. Difficulty: E True False 110. Difficulty: M True False 103. Difficulty: E True False 102. Difficulty: M True False 113. Difficulty: M True False 118. Addition polymers are mostly made from monomers with carbon-carbon double bonds. Difficulty: M True False 115. Difficulty: M True False 116. The backbone of protein molecules consists of repeating N Difficulty: M True False C C O units. Amino acids in solution can undergo an internal acid-base reaction. Both nylons and proteins are polyamides. Difficulty: M True False 119. Carboxylic acids are weak acids. Condensation polymers are formed by free radical addition reactions. Secondary amines have the general formula RNH2. Difficulty: E True False 114. Difficulty: M True False 117. .112. Esters can be formed by the dehydration-condensation of a carboxylic acid and an alcohol. (p. 636) D 4. 643) C 15. 636) C 3. 643) E 19. (p. (p. 644) A 25. 643) D 21. 643) B 13. (p. 652) C 26. (p. 651) D 28.Chapter 15 Organic Compounds and the Atomic Properties of Carbon Key 1. 643) E 11. (p. (p. (p. 643) C 17. (p. 643) C 9. 643) B 20. 643) A 8. (p. 636) D 2. (p. (p. 643) B 18. 643) D 6. (p. 636) E 5. (p. (Sec. (p. (p. 643) B 10. 643) C 7. 15. 652) B 27. (p. 643) D 14. (p. (p. (p.2) D . 652) E 24. (p. 643) A 16. (p. (p. (p. 643) D 22. (p. (p. 652) C 23. 643) D 12. (p. 651) E 57. 15. 651) D 58. 15. (Sec. (Sec. 651) E 46. (p. (p. (Sec. (p. (p. (p.3) C 39. 651) B 54.3) B 42. 651) C 56. 651) D 55. 651) D 47. 651) B 52.2) D 36.29. 651) C 59. (p. 15.3) A 41. (p. (p. 15. (p. 15. (p. 639) D 33. (Sec. 15. (Sec. 639) B 32.3) E 37. 15. (p.3) B 43. 651) D 50.3) E 44. 15. 651) E 51. (Sec. (Sec. (Sec. 651) A 53.2) D 35. 651) E . (p. (Sec. (p. (p. (Sec. 15.3) A 40. 651) C 49. (p. (Sec.4) B 38. (p. 15.2) B 34.2) C 30. 651) B 48. 651) C 31.3) D 45. (Sec. (p. 15. 15. 15. (p. (Sec. 665) D 79. (p. (p. 666) C 80. (p. (p. (p. 652) C 73. (p. 652) B 71.4) D 64. 15. 669) E 82. (p. (p. 650) B 75. 658) B 67. 650) D 74. 651) D 63. 672) B 83. 649) A 69. 652) C 70. 659) B 66. 665) E 77. (Sec. 664) C 78. 651) A 61. (p. (p. (p. (p. 649) B 68. 652) B 72. 667) A 81. (p. (p. (p. (p. 651) E 62. (p. (p. (p. 664) B 76. (p.60. (p. (p. 643) Difficulty: E . 654) A 65. (p. Difficulty: M 92.84. aldehyde e. (p. alcohol and ether c. (p. ketone d. 643) a. 639) In order to be optically active. 651) a. C4H10 b. cyclobutane b. 643) a. 643) Difficulty: M 86. cyclooctene c. (p. (p. C4H8 Difficulty: H 90. toluene (methylbenzene) Difficulty: E 89. C7H16 c. alcohol b. H3C—CH2—OH and H3C—O—CH3 b. ether c. 651) a. (p. 643) 2-methyl-2-pentene Difficulty: M 87. amide Difficulty: E . (p. Difficulty: M 88. the compound must have a non-superimposable mirror image. it will have hydrogen bonding while the ether does not. Difficulty: M 91. carboxylic acid f. 643) Difficulty: M 85. The alcohol will have the higher boiling point. (p. (p. 670) phosphate. enzymes (catalysts). (Sec. etc. The two regions of the protein backbone are thus held together. G. (p. Globular proteins use more amino acids in their structures. Difficulty: M 94. 15. 669) Fibrous proteins are composed of relatively few amino acids in a repeating pattern. B. H. (Sec. Difficulty: H 97.6) Disulfide bridges arise when two cysteine S H side chains react to form a covalent S S link between the two regions of the protein backbone. Difficulty: H 96. and they are found in hair. E. These regions of the molecule are then held together by this ionic . 15. (p. C. F. base.93. 15. Their structures are helices or sheets. Their functions are various: messenger molecules. skin and muscle. sugar Difficulty: E COO¯) group and NH3+). and they have various of irregular shapes. D.4) A.6) A salt bridge is the result of ionic attraction between a side chain with a carboxylate ( one with a protonated amine group ( attraction. (Sec. Difficulty: M 95. (Sec. 664) FALSE 117.6) TRUE 118. 671) 4  4  4 = 64 Difficulty: M 100. 630) FALSE 102. 659) TRUE 115. 650) TRUE 111. (p. the base sequence on one strand determines the base sequence on the other strand. 656) FALSE 112. (p. (p. Difficulty: M 99. 644) TRUE 107. adenine (A) and thymine (T). namely guanine (G). 658) TRUE 113. 644) FALSE 103. (p. (p. (p. 644) TRUE 104. 653) FALSE 114. and the strands are "complementary" to each other. G always pairs with C and A always pairs with T. 668) FALSE . (p. (p. 15. (Sec. 641) FALSE 105. (p. (p. (p. 15. (p. 647) FALSE 108. (p. 663) TRUE 116. 655) TRUE 109. (p.5. The double helix of DNA is held in place by hydrogen bonds between pairs of bases. 15.2) FALSE 106. 629) FALSE 101. 652) TRUE 110. (p. Thus. 668) TRUE 119. cytosine (C). one base being on each of the two strands. (p.98. (p. (p. (p. (p. 671) Each nucleotide along a single strand of DNA has one of four possible bases.