Question 1

Which of the following is not true about spikes?

Accepted Answer

A)  They may cause hemagglutination. 
B)  They are only found on enveloped viruses. 
C)  They are used for penetration. 
D)  They are used for absorption. 
E)  None of the above. 
A)  They may cause hemagglutination. 
B)  They are only found on enveloped viruses. 
C)  They are used for penetration. 
D)  They are used for absorption. 
E)  None of the above. C

Question 2

Latent viruses are present in cells as

Accepted Answer

A)  Enzymes. 
B)  Capsids. 
C)  Proviruses. 
D)  Prophages. 
E)  None of the above. 
A)  Enzymes. 
B)  Capsids. 
C)  Proviruses. 
D)  Prophages. 
E)  None of the above. C

Question 3

The following steps occur during multiplication of Herpesviruses. What is the third step?

Accepted Answer

A)  Biosynthesis 
B)  Uncoating 
C)  Release 
D)  Attachment 
E)  Penetration 
A)  Biosynthesis 
B)  Uncoating 
C)  Release 
D)  Attachment 
E)  Penetration B

Question 4

Figure 13.1
  
-In Figure 13.1, which of these is a complex virus?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
E)  All of the above 
A)  a 
B)  b 
C)  c 
D)  d 
E)  All of the above

Question 5

Bacteriophages and animal viruses do not differ significantly in which one of the following steps?

Accepted Answer

A)  Adsorption 
B)  Penetration 
C)  Biosynthesis 
D)  Release 
E)  Uncoating 
A)  Adsorption 
B)  Penetration 
C)  Biosynthesis 
D)  Release 
E)  Uncoating

Question 6

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

Accepted Answer

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

Question 7

The following steps occur during biosynthesis of a + strand RNA virus. What is the third step?

Accepted Answer

A)  Synthesis of - strand RNA 
B)  Synthesis of viral proteins 
C)  Penetration and uncoating 
D)  Attachment 
E)  Synthesis of + strand RNA 
A)  Synthesis of - strand RNA 
B)  Synthesis of viral proteins 
C)  Penetration and uncoating 
D)  Attachment 
E)  Synthesis of + strand RNA

Question 8

A viral species is a group of viruses that

Accepted Answer

A)  Have the same genetic information and ecological niche. 
B)  Have the same morphology and nucleic acid. 
C)  Infect the same cells and cause the same disease. 
D)  Can't be defined. 
A)  Have the same genetic information and ecological niche. 
B)  Have the same morphology and nucleic acid. 
C)  Infect the same cells and cause the same disease. 
D)  Can't be defined.

Question 9

Which of the following is not a method of culturing viruses?

Accepted Answer

A)  In embryonated eggs 
B)  In laboratory animals 
C)  In cell culture 
D)  In culture media 
E)  None of the above 
A)  In embryonated eggs 
B)  In laboratory animals 
C)  In cell culture 
D)  In culture media 
E)  None of the above

Question 10

Generalized transduction differs from specialized transduction in that generalized transduction

Accepted Answer

A)  Transfers specific DNA. 
B)  Involves lysogeny. 
C)  Kills the host. 
D)  Transfers DNA from one cell to another. 
E)  None of the above. 
A)  Transfers specific DNA. 
B)  Involves lysogeny. 
C)  Kills the host. 
D)  Transfers DNA from one cell to another. 
E)  None of the above.

Question 11

The most common route of accidental AIDS transmission to health- care workers is

Accepted Answer

A)  Environmental surface contact. 
B)  Mouth to mouth. 
C)  Fecal- oral. 
D)  Aerosol. 
E)  Needlestick. 
A)  Environmental surface contact. 
B)  Mouth to mouth. 
C)  Fecal- oral. 
D)  Aerosol. 
E)  Needlestick.

Question 12

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

Accepted Answer

A)  Influenzavirus. 
B)  Retroviridae. 
C)  Bacteriophage families. 
D)  Hepadnaviridae. 
E)  Herpesviridae. 
A)  Influenzavirus. 
B)  Retroviridae. 
C)  Bacteriophage families. 
D)  Hepadnaviridae. 
E)  Herpesviridae.

Question 13

The definition of lysogeny is

Accepted Answer

A)  Lysis of the host cell due to a phage. 
B)  Phage DNA is incorporated into host cell DNA. 
C)  When the burst time takes an unusually long time. 
D)  The period during replication when virions are not present. 
E)  None of the above. 
A)  Lysis of the host cell due to a phage. 
B)  Phage DNA is incorporated into host cell DNA. 
C)  When the burst time takes an unusually long time. 
D)  The period during replication when virions are not present. 
E)  None of the above.

Question 14

An infectious protein is a

Accepted Answer

A)  Retrovirus 
B)  Prion 
C)  Viroid 
D)  Bacteriophage 
E)  None of the above 
A)  Retrovirus 
B)  Prion 
C)  Viroid 
D)  Bacteriophage 
E)  None of the above

Question 15

The most conclusive evidence that viruses cause cancers is provided by

Accepted Answer

A)  Finding oncogenes in viruses. 
B)  Treating cancer with antibodies. 
C)  Some liver cancer patients having had hepatitis. 
D)  Cancer following injection of cell- free filtrates. 
E)  The presence of antibodies against viruses in cancer patients. 
A)  Finding oncogenes in viruses. 
B)  Treating cancer with antibodies. 
C)  Some liver cancer patients having had hepatitis. 
D)  Cancer following injection of cell- free filtrates. 
E)  The presence of antibodies against viruses in cancer patients.

Question 16

Assume you have isolated an unknown virus. It is a single- stranded RNA, enveloped virus. To which group does it most likely belong?

Accepted Answer

A)  Herpesvirus 
B)  Picornavirus 
C)  Togavirus 
D)  Retrovirus 
E)  None of the above 
A)  Herpesvirus 
B)  Picornavirus 
C)  Togavirus 
D)  Retrovirus 
E)  None of the above

Question 17

Which of the following is most likely a product of an early gene?

Accepted Answer

A)  Capsid proteins 
B)  Envelope proteins 
C)  Spike proteins 
D)  Lysozyme 
E)  DNA polymerase 
A)  Capsid proteins 
B)  Envelope proteins 
C)  Spike proteins 
D)  Lysozyme 
E)  DNA polymerase

Question 18

Most RNA viruses carry which of the following enzymes?

Accepted Answer

A)  Lysozyme 
B)  DNA- dependent DNA polymerase 
C)  ATP synthase 
D)  Reverse transcriptase 
E)  RNA- dependent RNA polymerase 
A)  Lysozyme 
B)  DNA- dependent DNA polymerase 
C)  ATP synthase 
D)  Reverse transcriptase 
E)  RNA- dependent RNA polymerase

Question 19

An oncogenic RNA virus must have which of the following enzymes?

Accepted Answer

A)  Lysozyme 
B)  Reverse transcriptase 
C)  RNA polymerase 
D)  DNA- dependent DNA polymerase 
E)  All of the above 
A)  Lysozyme 
B)  Reverse transcriptase 
C)  RNA polymerase 
D)  DNA- dependent DNA polymerase 
E)  All of the above

Question 20

Which of the following is not used as a criterion to classify viruses?

Accepted Answer

A)  Size 
B)  Number of capsomeres 
C)  Morphology 
D)  Nucleic acid 
E)  Biochemical tests 
A)  Size 
B)  Number of capsomeres 
C)  Morphology 
D)  Nucleic acid 
E)  Biochemical tests

Exam 13: Viruses, Viroids, and Prions

Which of the following is not true about spikes?

Latent viruses are present in cells as

The following steps occur during multiplication of Herpesviruses. What is the third step?

Figure 13.1 -In Figure 13.1, which of these is a complex virus?

Bacteriophages and animal viruses do not differ significantly in which one of the following steps?

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

The following steps occur during biosynthesis of a + strand RNA virus. What is the third step?

A viral species is a group of viruses that

Which of the following is not a method of culturing viruses?

Generalized transduction differs from specialized transduction in that generalized transduction

The most common route of accidental AIDS transmission to health- care workers is

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

The definition of lysogeny is

An infectious protein is a

The most conclusive evidence that viruses cause cancers is provided by

Assume you have isolated an unknown virus. It is a single- stranded RNA, enveloped virus. To which group does it most likely belong?

Which of the following is most likely a product of an early gene?

Most RNA viruses carry which of the following enzymes?

An oncogenic RNA virus must have which of the following enzymes?

Which of the following is not used as a criterion to classify viruses?

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 Recombinant DNA

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 Diseases of the Urinary and Reproductive Systems

Environmental Microbiology

Applied and Industrial Microbiology

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