Download Chapter 18 Review - Blue Valley Schools

Name: ______________________
_____ 1 Viral DNA makes mRNA by the process of
A lysis.
B replication.
C translation.
D transcription.
_____ 2 The lytic cycle of bacteriophage infection ends with the
A replication of viral DNA.
B rupture of the bacterium.
C assembly of viral particles into phages.
D the injection of phage DNA into a bacterium.
_____ 3 As a result of the lytic cycle,
A a prophage is created.
B the host cell is not destroyed.
C the host cell's DNA is destroyed.
D viral DNA is incorporated into host cell DNA.
_____ 4 In this
A
B
C
D
animation, the arrow is indicating
a capsid.
a prophage.
an envelope.
host cell DNA.
_____ 5 This animation is illustrating an early stage of
A translation.
B transcription.
C the lytic cycle.
D the lysogenic cycle.
_____ 6 In the lysogenic cycle
A viral DNA is replicated along with host DNA.
B host DNA is destroyed and viral DNA is replicated.
C a bacterium divides once before the lytic cycle is initiated.
D a bacterium replicates without passing viral DNA to its daughter cells.
_____ 7 Which of these is the best description of this animation?
A The lysogenic cycle has begun.
B The lysogenic cycle is making a transition to the lytic cycle.
C The lytic cycle is making a transition to the lysogenic cycle.
D The bacterium has successfully fought off the viral infection.
_____ 8 Cycle A is the _____ cycle and cycle B is the _____ cycle.
A lytic ... phage
B lytic ... lysogenic
C lysogenic ... lytic
D lysogenic ... phage
_____ 9 HIV is a retrovirus. The genetic material of retroviruses consists of
A single-stranded RNA.
B single-stranded DNA.
C double-stranded RNA.
D double-stranded DNA.
_____ 10 Which of these binds to receptor molecules on the host cell membrane?
A
A
B
B
C
C
D
D
E
E
Chapter 18 Review
_____ 11 What
A
B
C
D
is the source of a viral envelope?
provirus
prophages
viral glycoproteins
host cell membrane
_____ 12 This animation shows the formation of DNA from an RNA template. What enzyme is responsible for the
process shown in this animation?
A endonuclease
B RNA polymerase
C DNA polymerase
D reverse transcriptase
_____ 13 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 provirus.
B promoter.
C homeobox.
D transposon.
_____ 14 The operon model of the regulation of gene expression in bacteria was originally proposed by
A Mendel.
B Franklin.
C Jacob and Monod.
D Watson and Crick.
_____ 15 Which of these is NOT a component of the lac operon?
A operator
B promoter
C regulatory gene
D lactose-utilization genes
_____ 16 In a bacterial operon, regulatory proteins bind to
A the operator.
B RNA polymerase.
C the regulatory gene.
D the lactose-utilization genes.
_____ 17 In the presence of a regulatory protein, the lac operon is
A turned on.
B transcribed constantly.
C transcribed, but only at the basal level.
D transcribed at a faster than usual rate.
_____ 18 In this animation the blue sphere (“F”) represents
A mRNA.
B lactose.
C RNA polymerase.
D an active repressor.
_____ 19 In this animation the orange object (“C”) represents
A mRNA.
B RNA polymerase.
C an active repressor.
D an inactive repressor.
_____ 20 Which of these is a regulatory gene?
A
B
B
A
C
C
F
D
D
E
E
F
F