Microbiology Chapter 13 Test Bank
- ANSViruses are not composed of cells.
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. - ANSThey cannot reproduce themselves outside a host
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 hemagglutination.
D) They bind to receptors on the host cell surface.
E) They are found only on nonenveloped viruses - ANSthey are found only on nonenveloped
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 capsomeres - ANSbiochemical tests
Which of the following is NOT utilized to culture viruses?
A) laboratory animals
B) culture media
C) embryonated eggs
D) animal cell cultures
E) bacterial cultures - ANSculture media
Bacteriophages and animal viruses do NOT differ significantly in which one of the following
steps?
A) attachment
B) penetration
C) uncoating
D) biosynthesis
E) release - ANSbiosynthesis
, The definition of lysogeny 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 virions are not present.
D) when the burst time takes an unusually long time.
E) attachment of a phage to a cell. - ANSphage 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. - ANSinfectious 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. - ANSb
The structures illustrated in Figure 13.1 are composed of
A) DNA.
B) RNA.
C) DNA or RNA.
D) Capsomeres.
E) viroids. - ANSviroids
A clear area against a confluent "lawn" of bacteria is called a
A) phage.
B) pock.
C) cell lysis.
D) plaque.
E) rash. - ANSplaque
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 - ANScontinuous cell lines can be maintained
through an indefinite number of generations
Which of the following is necessary for replication of a prion?
- ANSViruses are not composed of cells.
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. - ANSThey cannot reproduce themselves outside a host
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 hemagglutination.
D) They bind to receptors on the host cell surface.
E) They are found only on nonenveloped viruses - ANSthey are found only on nonenveloped
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 capsomeres - ANSbiochemical tests
Which of the following is NOT utilized to culture viruses?
A) laboratory animals
B) culture media
C) embryonated eggs
D) animal cell cultures
E) bacterial cultures - ANSculture media
Bacteriophages and animal viruses do NOT differ significantly in which one of the following
steps?
A) attachment
B) penetration
C) uncoating
D) biosynthesis
E) release - ANSbiosynthesis
, The definition of lysogeny 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 virions are not present.
D) when the burst time takes an unusually long time.
E) attachment of a phage to a cell. - ANSphage 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. - ANSinfectious 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. - ANSb
The structures illustrated in Figure 13.1 are composed of
A) DNA.
B) RNA.
C) DNA or RNA.
D) Capsomeres.
E) viroids. - ANSviroids
A clear area against a confluent "lawn" of bacteria is called a
A) phage.
B) pock.
C) cell lysis.
D) plaque.
E) rash. - ANSplaque
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 - ANScontinuous cell lines can be maintained
through an indefinite number of generations
Which of the following is necessary for replication of a prion?
