Chapter 18 Review
1
In this diagram of a virus, the pointer is indicating the virus's
A
B
C
D
E
2
Viral DNA makes mRNA by the process of
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B
C
D
E
3
lysis.
infection.
replication.
translation.
transcription.
The lytic cycle of bacteriophage infection ends with the
A
B
C
D
E
4
capsid.
genome.
envelope.
mitochondria.
microfilaments.
replication of viral DNA.
rupture of the bacterium.
assembly of viral particles into phages.
the injection of phage DNA into a bacterium.
entry of the phage protein coat into the host cell.
In this diagram of a T4 bacteriophage, the pointer is indicating the
A
B
C
D
E
viral envelope.
viral protein coat.
viral nucleic acid genome.
bacterium's plasma membrane.
bacterium's nucleic acid genome.
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Page 1
Chapter 18 Review
5
As a result of the lytic cycle,
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B
C
D
E
6
In this animation, the arrow is indicating
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B
C
D
E
7
lysis.
translation.
transcription.
the lytic cycle.
the lysogenic cycle.
In the lysogenic cycle
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B
C
D
E
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a capsid.
a prophage.
an envelope.
host cell DNA.
a Golgi apparatus.
This animation is illustrating an early stage of
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B
C
D
E
8
a prophage is created.
the host cell is not destroyed.
viral ribosomes are produced.
the host cell's DNA is destroyed.
viral DNA is incorporated into host cell DNA.
viral DNA is replicated along with host DNA.
host DNA is destroyed and viral DNA is replicated.
viral DNA is destroyed and host DNA is replicated.
a bacterium divides once before the lytic cycle is initiated.
a bacterium replicates without passing viral DNA to its daughter cells.
Which of these is the best description of this animation?
A
B
C
D
E
The lysogenic cycle has begun.
The host cell has begun to reproduce.
The lysogenic cycle is making a transition to the lytic cycle.
The lytic cycle is making a transition to the lysogenic cycle.
The bacterium has successfully fought off the viral infection.
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Page 2
Chapter 18 Review
10
Cycle A is the _____ cycle and cycle B is the _____ cycle.
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B
C
D
E
11
HIV is a retrovirus. The genetic material of retroviruses consists of
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B
C
D
E
12
single-stranded RNA.
single-stranded DNA.
double-stranded RNA.
double-stranded DNA.
none of the above
Which of these binds to receptor molecules on the host cell membrane?
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B
C
D
E
13
lytic ... phage
lytic ... lysogenic
lysogenic ... lytic
lysogenic ... phage
phage ... lysogenic
A
B
C
D
E
What is the function of reverse transcriptase?
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B
C
D
E
It catalyzes the formation of RNA from a DNA template.
It catalyzes the formation of DNA from an RNA template.
It catalyzes the formation of RNA from a polypeptide template.
It catalyzes the formation of DNA from a polypeptide template.
It catalyzes the formation of a polypeptide from an RNA template.
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Page 3
Chapter 18 Review
14
What is the source of a viral envelope?
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B
C
D
E
15
Which of these is reverse transcriptase?
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B
C
D
E
16
A
B
C
D
E
Which of these is the viral genome?
A
B
C
D
E
17
provirus
prophages
host cell DNA
viral glycoproteins
host cell membrane
A
B
C
D
E
What enzyme is responsible for the process shown in this animation?
A
B
C
D
E
DNA ligase
endonuclease
RNA polymerase
DNA polymerase
reverse transcriptase
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Page 4
Chapter 18 Review
18
When HIV reproduces, reverse transcriptase catalyzes the synthesis of a DNA strand
complementary to the viral RNA strand and then a second DNA strand complementary to
the first. After this, the double-stranded viral DNA is incorporated into a host cell as a
A
B
C
D
E
19
The operon model of the regulation of gene expression in bacteria was originally proposed
by
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C
D
E
20
the operator.
RNA polymerase.
the regulatory gene.
transcription factors.
the lactose-utilization genes.
In the presence of a regulatory protein, the lac operon is
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B
C
D
E
23
operator only
promoter only
regulatory gene only
promoter and operator
lactose-utilization genes only
In a bacterial operon, regulatory proteins bind to
A
B
C
D
E
22
Darwin.
Mendel.
Franklin.
Jacob and Monod.
Watson and Crick.
Which of these is NOT a component of the lac operon?
A
B
C
D
E
21
lac.
provirus.
promoter.
transposon.
homeoboxes.
transcribed.
is turned on.
only transcribed at the basal level.
either transcribed or not transcribed.
transcribed at a faster than usual rate.
In this animation the blue sphere represents
A
B
C
D
E
mRNA.
lactose.
RNA polymerase.
an active repressor.
an inactive repressor.
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Page 5
Chapter 18 Review
24
In this animation the orange object represents
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B
C
D
E
25
mRNA.
lactose.
RNA polymerase.
an active repressor.
an inactive repressor.
Which of these is a regulatory gene?
A
B
C
D
E
A
B
C
D
E
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Page 6
Chapter 18 Review
Page 7
Answer Key : Chapter 18 Review
Question:
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Answer
B
E
B
B
D
B
E
A
C
B
A
A
B
E
C
E
E
B
D
C
A
C
B
C
D