78. Classify the following molecule:
A)
primary amine
B)
secondary amine
C)
tertiary amine
D)
amino acid
E)
peptide
79. Identify the secondary amine.
A)
CH3NH2
B)
(CH3)2NH
C)
D)
NH3
E)
(CH3)3N
80. For which of the following compound(s) are cis and trans isomers possible?
A)
2,3-dimethyl-2-butene
B)
3-methyl-2-pentene
C)
4,4-dimethylcyclohexanol
D)
ortho-chlorotoluene
E)
All can exhibit cis/trans isomers.
81. Which of the following has an optical isomer?
A)
B)
C)
D)
E)
none of these
82. Which structure represents an optically active aldehyde?
A)
B)
C)
D)
E)
83. Pick the optically active molecule from the following.
A)
B)
C)
D)
E)
none of these
84. Which of the following molecules exhibits chirality?
A)
CH4
B)
CH3OH
C)
CH3CH2OH
D)
E)
none of these
85. Which of the following is optically active (i.e., chiral)?
A)
HN(CH3)2
B)
CH2Cl2
C)
2-chloropropane
D)
2-chlorobutane
E)
3-chloropentane
86. Identify all the functional groups present in the following organic compound: 1) ketone, 2)
aldehyde, 3) acid, 4) alcohol, 5) ether, 6) ester, 7) amine.
A)
2,6
B)
2,5
C)
1,2
D)
1,2,5
E)
3,4
87. Teflon is an example of a
A)
copolymer
B)
homopolymer
C)
dimer
D)
two of these
E)
none of these
88. Teflon is a type of
A)
nylon
B)
PVC
C)
elastomer
D)
polymer
E)
synthetic rubber
89. Consider the polymer drawn below:
What monomer(s) is (are) needed to produce the above polymer?
A)
CH2 = CH2 and CH3CH = CH2
B)
CH2 = C(CH3)2
C)
CH3CH = CHCH3
D)
CO and CH2 = CH2
E)
none of the above
90. The polymer
is formed by addition of
A)
CH2=CH-CH3
B)
CH3CH2CH3
C)
CH3–CH=CH–CH3
D)
H2C=CH–CH=CH2
E)
CH3CH=C(CH3)2
91. Which of the following pairs of substances could form an addition copolymer?
A)
H2C=CHCH3 + HOCH2CH2COOH
B)
HO(CH2)4COOH + HOCH2CH=CHCH3
C)
H2C=CHCH + H2C=CHCH3
D)
HOCH2CH2OH + HOOCCOOH
E)
H2NCH2COOH + H2NCH2CH2COOH
92. The structure of the polymer used in a freezer wrap can mainly be described as follows:
[CCl2 –CH2 –CCl2–CH2 –CCl2 –CH2 –CCl2 –CH2]n
The chief monomer of this wrap would have which structure?
A)
CCl2=CH2
B)
Cl2C–CH2
C)
Cl2C=CH2=CCl2
D)
CCl2
E)
none of these
93. Which of the following polymers is not based on a substituted ethylene monomer?
A)
nylon
B)
polyvinylchloride
C)
Teflon
D)
polystyrene
E)
polypropylene
94. The greatest single use for PVC is
A)
credit cards
B)
table cloths and mats
C)
pipe and pipe fittings
D)
garden hose
E)
toys
95. No atoms are lost from starting material in making which kind of polymer?
A)
condensation polymer
B)
polyester polymer
C)
addition polymer
D)
vulcanized polymer
E)
branched polymer
96. The formula below is the repeating unit of a
A)
homopolymer formed by an addition reaction
B)
homopolymer formed by a condensation reaction
C)
copolymer formed by an addition reaction
D)
copolymer formed by a condensation reaction
E)
polyester formed by an addition reaction
97. Which of the following pairs of substances could form a polyester?
A)
H2C=CHCH3 + HOCH2CH2COOH
B)
HO(CH2)4COOH + HOCH2CH=CHCH3
C)
H2C=CHCN + H2C=CHCH3
D)
HOCH2CH2OH + HOOCCOOH
E)
H2NCH2COOH + H2NCH2CH2COOH
98. Which of the following monomers are used to produce the polymer:
A)
I
B)
II
C)
III
D)
I and III
E)
II and III
99. What monomer(s) is (are) needed to make the polymer shown below?
I.
HOCH2CH2OH
II
HOOCCH2CH2COOH
III.
HOCH2CH2COOH
IV.
HOCH=CHOH
V.
HOOCCH=CHCOOH
A)
II
B)
III
C)
I and II
D)
IV and V
E)
II and III
100. In condensation polymerization, a common by-product is:
A)
ethylene
B)
alcohol
C)
aldehyde
D)
water
E)
none of these
101. Dacron is an example of a
A)
copolymer
B)
homopolymer
C)
dimer
D)
two of these
E)
none of these
102. In each pair below the relative strength of the polymer types is indicated with the stronger
polymer on the right. Which comparison is wrong?
A)
low molecular weight < high molecular weight
B)
polyamide (e.g., nylon) < polyhydrocarbon (e.g., polyethylene)
C)
branched < linear
D)
low density < high density
E)
atactic < isotactic
103. When sulfur is added to rubber and the mixture is heated, the resulting rubber is still elastic
but much stronger. This process is called
A)
addition polymerization
B)
isomerization
C)
oligomerization
D)
vulcanization
E)
halogenation
104. Which factor is not characteristic of a strong polymer?
A)
high crystallinity
B)
branching
C)
strong intermolecular forces
D)
high molecular weight
E)
isotactic
105. The major use for linear low-density polyethylene (LDPE) is in the manufacturing of
A)
pipes
B)
film for packaging
C)
Teflon
D)
rubber
E)
carpets
106. HDPE, or high-density polyethylene, is a highly recyclable material because:
A)
It has a high molecular weight (molar mass).
B)
It is both strong and tough.
C)
It is a thermoplastic polymer.
D)
It is a thermoset polymer.
E)
None of these.
107. Which of the following will increase the rigidity of a polymer?
A)
shorter polymer chains
B)
making chains more branched
C)
decreasing cross-linking
D)
introducing the possibility of hydrogen bonding between chains
E)
using atactic instead of isotactic chains
108. Polystyrene is an addition polymer of styrene. What would be the effect if some
divinylbenzene was added to styrene and then polymerized?
A)
The second polymer would be made less flammable than pure polystyrene.
B)
The polymer would be more flexible. Divinylbenzene acts as a plasticizer.
C)
Divinylbenzene would act as a cross-linking agent, making the polymer stronger.
D)
There would be no effect on the properties of the polymer.
E)
There would be an effect, but it cannot be predicted.
109. How many of the following apply to globular proteins?
I.
Provide structural integrity and strength for many types of tissues.
II.
Transport and store oxygen and nutrients.
III.
Act as catalysts.
IV.
Are the main components of muscle, hair, and cartilage.
V.
Fight invasion of the body by foreign objects.
A)
1
B)
2
C)
3
D)
4
E)
5
110. How many of the following apply to fibrous proteins?
I.
Provide structural integrity and strength for many types of tissues.
II.
Transport and store oxygen and nutrients.
III.
Act as catalysts.
IV.
Are the main components of muscle, hair, and cartilage.
V.
Fight invasion of the body by foreign objects.
A)
1
B)
2
C)
3
D)
4
E)
5
111. Which of the following is not a function of proteins?
A)
Structure.
B)
Catalysis.
C)
Oxygen transport.
D)
Energy transformation.
E)
All of these are functions of proteins.
112. Which one of the following statements about the structure of proteins is incorrect?
A)
Disulfide bonds provide strong intrachain interactions.
B)
Hydrogen bonding stabilizes the -helix proteins.
C)
Nonpolar groups tend to face the outside of a protein in an aqueous solution.
D)
Ionized amino acid side chains can form salt bridges within a protein.
E)
Heat can disrupt tertiary structure.
113. The building blocks of all proteins are
A)
pleated sheets
B)
alpha amino acids
C)
alpha helices
D)
tertiary structures
E)
none of these
114. What are the building blocks of proteins?
A)
nucleotides
B)
glucose and sucrose
C)
lipids
D)
amino acids
E)
esters
115. A polypeptide is
A)
an addition polymer of amino acids
B)
a condensation polymer of amino acids
C)
a polymer of sugar molecules
D)
a part of nucleic acids
E)
none of these
116. The condensation product of two amino acids is a(n)
A)
dipeptide
B)
glycol
C)
ether
D)
ester
E)
diastereomer
117. Nonpolar amino acid side chains contain substituents made mostly of what atoms?
A)
carbon and hydrogen
B)
nitrogen and oxygen
C)
carbon and nitrogen
D)
carbon and oxygen
E)
nitrogen and hydrogen
118. Polar amino acid side chains contain functional groups containing mostly what atoms?
A)
carbon and hydrogen
B)
nitrogen and oxygen
C)
carbon and nitrogen
D)
carbon and oxygen
E)
nitrogen and hydrogen
119. Which of the following is incorrect?
A)
Nonpolar amino acid side chains are hydrophobic.
B)
Polar amino acid side chains are hydrophilic.
C)
Nonpolar amino acid side chains contain hydrogen.
D)
Polar amino acid side chains contain nitrogen.
E)
Both polar and nonpolar amino acid side chains contain oxygen atoms.
120. Consider the two amino acids below. The circled portion of each amino acid represents their
R groups, or side chains.
Leucine Asparagine
Which of the following statements are true?
A)
Leucine’s side chain is polar and asparagine’s side chain is nonpolar.
B)
The side chain on asparagine is hydrophilic.
C)
Asparagine is used to make polypeptides, but leucine is not.
D)
Leucine’s large side chain makes it very reactive and unstable.
E)
At least two of the above statements are true.
121. Which of the following is the best description of a protein?
A)
an alternating chain of amino acids and nucleic acids
B)
a chain of amino acids connected by ester bonds
C)
two antiparallel chains of nucleic acids connected by hydrogen bonding
D)
a chain of amino acids formed by condensation polymerization