Question 1

An infectious protein is a

Accepted Answer

A)  bacteriophage. 
B)  prion. 
C)  papovavirus. 
D)  viroid. 
E)  retrovirus. 
A)  bacteriophage. 
B)  prion. 
C)  papovavirus. 
D)  viroid. 
E)  retrovirus.

Question 2

Explain the steps involved in bacteriophage DNA entering a bacterial cell.

Accepted Answer

Bacteriophage DNA entering a bacterial c

Question 3

Researchers studying tissues of diseased marine mammals have identified what appear to be viral particles by electron microscopy. Describe three methods you might use to attempt to culture this virus for further study.

Accepted Answer

1. Cell culture: One method to attempt t

Question 4

DNA made from an RNA template will be incorporated into the virus capsid of

Accepted Answer

A)  Hepadnaviridae. 
B)  influenzavirus. 
C)  bacteriophage families. 
D)  Herpesviridae. 
E)  Retroviridae. 
A)  Hepadnaviridae. 
B)  influenzavirus. 
C)  bacteriophage families. 
D)  Herpesviridae. 
E)  Retroviridae.

Question 5

Which of the following statements about viruses is FALSE?

Accepted Answer

A)  Viruses contain DNA or RNA but never both. 
B)  Viruses contain a protein coat. 
C)  Viruses have genes. 
D)  Viruses use their own catabolic enzymes. 
E)  Viruses use the anabolic machinery of the cell. 
A)  Viruses contain DNA or RNA but never both. 
B)  Viruses contain a protein coat. 
C)  Viruses have genes. 
D)  Viruses use their own catabolic enzymes. 
E)  Viruses use the anabolic machinery of the cell.

Question 6

Helical and icosahedral are terms used to describe the shapes of a virus envelope.

Accepted Answer

A) True 
 B)False

Question 7

Figure 13.2
  
-Assume a patient has influenza. During which time on the graph in Figure 13.2 would the patient show the symptoms of the illness?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
E)  e 
A)  a 
B)  b 
C)  c 
D)  d 
E)  e

Question 8

Bacteriophage replication differs from animal virus replication because only bacteriophage replication involves

Accepted Answer

A)  assembly of viral components. 
B)  replication of viral nucleic acid. 
C)  adsorption to specific receptors. 
D)  injection of naked nucleic acid into the host cell. 
E)  lysis of the host cell. 
A)  assembly of viral components. 
B)  replication of viral nucleic acid. 
C)  adsorption to specific receptors. 
D)  injection of naked nucleic acid into the host cell. 
E)  lysis of the host cell.

Question 9

Lysogeny can result in all of the following EXCEPT

Accepted Answer

A)  acquisition of new characteristics by the host cell. 
B)  phage conversion. 
C)  specialized transduction. 
D)  immunity to reinfection by any phage. 
E)  immunity to reinfection by the same phage. 
A)  acquisition of new characteristics by the host cell. 
B)  phage conversion. 
C)  specialized transduction. 
D)  immunity to reinfection by any phage. 
E)  immunity to reinfection by the same phage.

Question 10

Figure 13.1
  
-The structures illustrated in Figure 13.1 are composed of

Accepted Answer

A)  DNA or RNA. 
B)  RNA. 
C)  viroids. 
D)  Capsomeres. 
E)  DNA. 
A)  DNA or RNA. 
B)  RNA. 
C)  viroids. 
D)  Capsomeres. 
E)  DNA.

Question 11

Which of the following would be the first step in biosynthesis of a virus with a - (minus) strand of RNA?

Accepted Answer

A)  transcription of mRNA from DNA 
B)  synthesis of double-stranded RNA from a DNA template 
C)  synthesis of DNA from an RNA template 
D)  synthesis of double-stranded RNA from an RNA template 
E)  synthesis of DNA from a DNA template 
A)  transcription of mRNA from DNA 
B)  synthesis of double-stranded RNA from a DNA template 
C)  synthesis of DNA from an RNA template 
D)  synthesis of double-stranded RNA from an RNA template 
E)  synthesis of DNA from a DNA template

Question 12

Compare and contrast the lytic cycle of infection of a DNA virus and an RNA virus.

Accepted Answer

The lytic cycle of infection for DNA vir

Question 13

Positive sense RNA strands of viruses are treated like mRNA inside the host cell.

Accepted Answer

A) True 
 B)False

Question 14

Which of the following statements about viral spikes is FALSE?

Accepted Answer

A)  They bind to receptors on the host cell surface. 
B)  They are composed of carbohydrate-protein complexes. 
C)  They may cause hemagglutination. 
D)  They are found only on nonenveloped viruses. 
E)  They are used for attachment. 
A)  They bind to receptors on the host cell surface. 
B)  They are composed of carbohydrate-protein complexes. 
C)  They may cause hemagglutination. 
D)  They are found only on nonenveloped viruses. 
E)  They are used for attachment.

Question 15

Viruses that utilize reverse transcriptase belong to the virus families

Accepted Answer

A)  Rhabdoviridae and Herpesviridae. 
B)  Herpesviridae and Retroviridae. 
C)  Hepadnaviridae and Retroviridae. 
D)  Retroviridae and Picornaviridae. 
E)  Herpesviridae and Poxviridae. 
A)  Rhabdoviridae and Herpesviridae. 
B)  Herpesviridae and Retroviridae. 
C)  Hepadnaviridae and Retroviridae. 
D)  Retroviridae and Picornaviridae. 
E)  Herpesviridae and Poxviridae.

Question 16

Which of the following is NOT utilized to culture viruses?

Accepted Answer

A)  animal cell cultures 
B)  culture media 
C)  embryonated eggs 
D)  laboratory animals 
E)  bacterial cultures 
A)  animal cell cultures 
B)  culture media 
C)  embryonated eggs 
D)  laboratory animals 
E)  bacterial cultures

Question 17

Most RNA viruses carry which of the following enzymes?

Accepted Answer

A)  reverse transcriptase 
B)  lysozyme 
C)  ATP synthase 
D)  RNA-dependent RNA polymerase 
E)  DNA-dependent DNA polymerase 
A)  reverse transcriptase 
B)  lysozyme 
C)  ATP synthase 
D)  RNA-dependent RNA polymerase 
E)  DNA-dependent DNA polymerase

Question 18

The following steps occur during multiplication of herpesviruses. Which is the third step?

Accepted Answer

A)  penetration 
B)  attachment 
C)  biosynthesis 
D)  release 
E)  uncoating 
A)  penetration 
B)  attachment 
C)  biosynthesis 
D)  release 
E)  uncoating

Question 19

Which of the following statements provides the most significant support for the idea that viruses are nonliving chemicals?

Accepted Answer

A)  They are chemically simple. 
B)  They are filterable. 
C)  They cause diseases similar to those caused by chemicals. 
D)  They cannot reproduce themselves outside a host. 
E)  They are not composed of cells. 
A)  They are chemically simple. 
B)  They are filterable. 
C)  They cause diseases similar to those caused by chemicals. 
D)  They cannot reproduce themselves outside a host. 
E)  They are not composed of cells.

Question 20

Viruses are the only known infectious agents that are obligatory intracellular parasites.

Accepted Answer

A) True 
 B)False

Exam 13: Viruses, Viroids, and Prions

An infectious protein is a

Explain the steps involved in bacteriophage DNA entering a bacterial cell.

Researchers studying tissues of diseased marine mammals have identified what appear to be viral particles by electron microscopy. Describe three methods you might use to attempt to culture this virus for further study.

DNA made from an RNA template will be incorporated into the virus capsid of

Which of the following statements about viruses is FALSE?

Helical and icosahedral are terms used to describe the shapes of a virus envelope.

Figure 13.2 -Assume a patient has influenza. During which time on the graph in Figure 13.2 would the patient show the symptoms of the illness?

Bacteriophage replication differs from animal virus replication because only bacteriophage replication involves

Lysogeny can result in all of the following EXCEPT

Figure 13.1 -The structures illustrated in Figure 13.1 are composed of

Which of the following would be the first step in biosynthesis of a virus with a - (minus) strand of RNA?

Compare and contrast the lytic cycle of infection of a DNA virus and an RNA virus.

Positive sense RNA strands of viruses are treated like mRNA inside the host cell.

Which of the following statements about viral spikes is FALSE?

Viruses that utilize reverse transcriptase belong to the virus families

Which of the following is NOT utilized to culture viruses?

Most RNA viruses carry which of the following enzymes?

The following steps occur during multiplication of herpesviruses. Which is the third step?

Which of the following statements provides the most significant support for the idea that viruses are nonliving chemicals?

Viruses are the only known infectious agents that are obligatory intracellular parasites.

The Microbial World and You

Chemical Principles

Observing Microorganisms Through a Microscope

Functional Anatomy of Prokaryotic and Eukaryotic Cells

Microbial Metabolism

Microbial Growth

The Control of Microbial Growth

Microbial Genetics

Biotechnology and Dna Technology

Classification of Microorganisms

The Prokaryotes: Domains Bacteria and Archaea

The Eukaryotes: Fungi, Algae, Protozoa, and Helminths

Principles of Disease and Epidemiology

Microbial Mechanisms of Pathogenicity

Innate Immunity: Nonspecific Defenses of the Host

Adaptive Immunity: Specific Defenses of the Host

Practical Applications of Immunology

Disorders Associated With the Immune System

Antimicrobial Drugs

Microbial Diseases of the Skin and Eyes

Microbial Diseases of the Nervous System

Microbial Diseases of the Cardiovascular and Lymphatic Systems

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Disease of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

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