Microbiology Chapter 13 Test Bank, Exam Questions with
Approved Answers |2026 upgraded |graded A+
Which of the following statements provides the most significant support for the idea that viruses are
nonliving chemicals?
A) They are not composed of cells.
B) They are filterable.
C) They cannot reproduce themselves outside a host.
D) They cause diseases similar to those caused by chemicals.
E) They are chemically simple. - CORRECT ANSWER- They cannot reproduce themselves outside a host
Which of the following would not be considered an emerging disease? - CORRECT ANSWER-
tuberculosis
Which of the following would not be considered a reemerging disease? - CORRECT ANSWER- west Nile
virus fever
which of the following factors can lead to reemergence of a disease? - CORRECT ANSWER- a period of
decline in vaccination rates
Why are emerging diseases with very few cases the focus of intense scrutiny? - CORRECT ANSWER- they
are increasing and not controlled
the __ collects data and conducts epidemiologic studies at the global level. - CORRECT ANSWER- WHO
Which of the following statements about viral spikes is FALSE?
A) They are composed of carbohydrate-protein complexes.
B) They are used for attachment.
C) They may cause hem agglutination.
,D) They bind to receptors on the host cell surface.
E) They are found only on no enveloped viruses - CORRECT ANSWER- they are found only on no
enveloped viruses
Which of the following is NOT used as a criterion to classify viruses?
A) biochemical tests
B) morphology
C) nucleic acid
D) size
E) number of cashmeres - CORRECT ANSWER- biochemical tests
Which of the following is NOT utilized to culture viruses?
A) laboratory animals
B) culture media
C) embrocated eggs
D) animal cell cultures
E) bacterial cultures - CORRECT ANSWER- culture media
Bacteriophages and animal viruses do NOT differ significantly in which one of the following steps?
A) attachment
B) penetration
C) uncrating
D) biosynthesis
E) release - CORRECT ANSWER- biosynthesis
The definition of lysogenic is
A) phage DNA is incorporated into host cell DNA.
B) lysis of the host cell due to a phage.
C) the period during replication when visions are not present.
,D) when the burst time takes an unusually long time.
E) attachment of a phage to a cell. - CORRECT ANSWER- phage DNA is incorporated into host cell DNA
A viroid is a(n)
A) complete, infectious virus particle.
B) infectious piece of RNA without a capsid.
C) capsid without nucleic acid.
D) provirus.
E) infectious protein. - CORRECT ANSWER- infectious piece of RNA without a capsid
In Figure 13.1, which structure is a complex virus?
A) a (3D diamond looking thing)
B) b (looks like a spider)
C) c (2D diamond with loopdiloops)
D) d (spiral)
E) All of the structures are complex viruses. - CORRECT ANSWER- b
The structures illustrated in Figure 13.1 are composed of
A) DNA.
B) RNA.
C) DNA or RNA.
D) Cashmeres.
E) viroid’s. - CORRECT ANSWER- viroid’s
A clear area against a confluent "lawn" of bacteria is called a
A) phage.
B) pock.
C) cell lysis.
D) plaque.
, E) rash. - CORRECT ANSWER- plaque
Continuous cell lines differ from primary cell lines in that
A) viruses can be grown in continuous cell lines.
B) continuous cell lines always have to be re-isolated from animal tissues.
C) continuous cell lines are derived from primary cell lines.
D) continuous cell lines can be maintained through an indefinite number of generations.
E) continuous cell lines are from human embryos - CORRECT ANSWER- continuous cell lines can be
maintained through an indefinite number of generations
Which of the following is necessary for replication of a prion?
A) DNA
B) DNA polymerase
C) lysozyme
D) PRs
E) RNA - CORRECT ANSWER- PRs
A persistent infection is one in which
A) the virus remains in equilibrium with the host without causing a disease.
B) viral replication is unusually slow.
C) the disease process occurs gradually over a long period.
D) host cells are gradually lysed.
E) host cells are transformed. - CORRECT ANSWER- the disease process occurs gradually over a long
period
dsDNA enveloped viruses - CORRECT ANSWER- poxviridae, herpesviridae, orthopoxvirus, Para poxvirus,
simplex virus
dsDNA naked viruses - CORRECT ANSWER- adenoviridae, papillomaviridae, reoviridae
Approved Answers |2026 upgraded |graded A+
Which of the following statements provides the most significant support for the idea that viruses are
nonliving chemicals?
A) They are not composed of cells.
B) They are filterable.
C) They cannot reproduce themselves outside a host.
D) They cause diseases similar to those caused by chemicals.
E) They are chemically simple. - CORRECT ANSWER- They cannot reproduce themselves outside a host
Which of the following would not be considered an emerging disease? - CORRECT ANSWER-
tuberculosis
Which of the following would not be considered a reemerging disease? - CORRECT ANSWER- west Nile
virus fever
which of the following factors can lead to reemergence of a disease? - CORRECT ANSWER- a period of
decline in vaccination rates
Why are emerging diseases with very few cases the focus of intense scrutiny? - CORRECT ANSWER- they
are increasing and not controlled
the __ collects data and conducts epidemiologic studies at the global level. - CORRECT ANSWER- WHO
Which of the following statements about viral spikes is FALSE?
A) They are composed of carbohydrate-protein complexes.
B) They are used for attachment.
C) They may cause hem agglutination.
,D) They bind to receptors on the host cell surface.
E) They are found only on no enveloped viruses - CORRECT ANSWER- they are found only on no
enveloped viruses
Which of the following is NOT used as a criterion to classify viruses?
A) biochemical tests
B) morphology
C) nucleic acid
D) size
E) number of cashmeres - CORRECT ANSWER- biochemical tests
Which of the following is NOT utilized to culture viruses?
A) laboratory animals
B) culture media
C) embrocated eggs
D) animal cell cultures
E) bacterial cultures - CORRECT ANSWER- culture media
Bacteriophages and animal viruses do NOT differ significantly in which one of the following steps?
A) attachment
B) penetration
C) uncrating
D) biosynthesis
E) release - CORRECT ANSWER- biosynthesis
The definition of lysogenic is
A) phage DNA is incorporated into host cell DNA.
B) lysis of the host cell due to a phage.
C) the period during replication when visions are not present.
,D) when the burst time takes an unusually long time.
E) attachment of a phage to a cell. - CORRECT ANSWER- phage DNA is incorporated into host cell DNA
A viroid is a(n)
A) complete, infectious virus particle.
B) infectious piece of RNA without a capsid.
C) capsid without nucleic acid.
D) provirus.
E) infectious protein. - CORRECT ANSWER- infectious piece of RNA without a capsid
In Figure 13.1, which structure is a complex virus?
A) a (3D diamond looking thing)
B) b (looks like a spider)
C) c (2D diamond with loopdiloops)
D) d (spiral)
E) All of the structures are complex viruses. - CORRECT ANSWER- b
The structures illustrated in Figure 13.1 are composed of
A) DNA.
B) RNA.
C) DNA or RNA.
D) Cashmeres.
E) viroid’s. - CORRECT ANSWER- viroid’s
A clear area against a confluent "lawn" of bacteria is called a
A) phage.
B) pock.
C) cell lysis.
D) plaque.
, E) rash. - CORRECT ANSWER- plaque
Continuous cell lines differ from primary cell lines in that
A) viruses can be grown in continuous cell lines.
B) continuous cell lines always have to be re-isolated from animal tissues.
C) continuous cell lines are derived from primary cell lines.
D) continuous cell lines can be maintained through an indefinite number of generations.
E) continuous cell lines are from human embryos - CORRECT ANSWER- continuous cell lines can be
maintained through an indefinite number of generations
Which of the following is necessary for replication of a prion?
A) DNA
B) DNA polymerase
C) lysozyme
D) PRs
E) RNA - CORRECT ANSWER- PRs
A persistent infection is one in which
A) the virus remains in equilibrium with the host without causing a disease.
B) viral replication is unusually slow.
C) the disease process occurs gradually over a long period.
D) host cells are gradually lysed.
E) host cells are transformed. - CORRECT ANSWER- the disease process occurs gradually over a long
period
dsDNA enveloped viruses - CORRECT ANSWER- poxviridae, herpesviridae, orthopoxvirus, Para poxvirus,
simplex virus
dsDNA naked viruses - CORRECT ANSWER- adenoviridae, papillomaviridae, reoviridae
