Question 1

The basic mechanism of viral multiplication is similar for all viruses.

Accepted Answer

A) True 
 B)False  True

Question 2

Figure 13.1
  
-In Figure 13.1, which structure is a complex virus?

Accepted Answer

A)  a 
B)  b 
C)  c 
D)  d 
E)  All of the structures are complex viruses. 
A)  a 
B)  b 
C)  c 
D)  d 
E)  All of the structures are complex viruses. B

Question 3

A segmented genome can result in antigenic shift.

Accepted Answer

A) True 
 B)False  True

Question 4

A viral species is a group of viruses that

Accepted Answer

A)  has the same genetic information and ecological niche. 
B)  has the same morphology and nucleic acid. 
C)  infects the same cells and cause the same disease. 
D)  cannot be defined. 
A)  has the same genetic information and ecological niche. 
B)  has the same morphology and nucleic acid. 
C)  infects the same cells and cause the same disease. 
D)  cannot be defined.

Question 5

Glycoprotein spikes are found on the capsids of all viruses.

Accepted Answer

A) True 
 B)False

Question 6

Dogs do not get measles because their cells lack the correct receptor sites for that virus.

Accepted Answer

A) True 
 B)False

Question 7

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 8

What contributes to antigenic shift in influenza viruses?

Accepted Answer

A)  ease of virus transmission 
B)  attachment spikes 
C)  worldwide distribution of the virus 
D)  a segmented genome 
E)  different virus subtypes 
A)  ease of virus transmission 
B)  attachment spikes 
C)  worldwide distribution of the virus 
D)  a segmented genome 
E)  different virus subtypes

Question 9

Which of the following is necessary for replication of a prion?

Accepted Answer

A)  RNA 
B)  DNA polymerase 
C)  lysozyme 
D)  PrPSc 
E)  DNA 
A)  RNA 
B)  DNA polymerase 
C)  lysozyme 
D)  PrPSc 
E)  DNA

Question 10

A persistent infection is one in which

Accepted Answer

A)  the virus remains in equilibrium with the host without causing a disease. 
B)  host cells are transformed. 
C)  host cells are gradually lysed. 
D)  the disease process occurs gradually over a long period. 
E)  viral replication is unusually slow. 
A)  the virus remains in equilibrium with the host without causing a disease. 
B)  host cells are transformed. 
C)  host cells are gradually lysed. 
D)  the disease process occurs gradually over a long period. 
E)  viral replication is unusually slow.

Question 11

Some viruses, such as human herpesvirus 1, infect a cell without causing symptoms. These are called

Accepted Answer

A)  latent viruses. 
B)  lytic viruses. 
C)  slow viruses. 
D)  phages. 
E)  unconventional viruses. 
A)  latent viruses. 
B)  lytic viruses. 
C)  slow viruses. 
D)  phages. 
E)  unconventional viruses.

Question 12

The mechanism whereby an enveloped virus leaves a host cell is called

Accepted Answer

A)  budding. 
B)  transduction. 
C)  penetration. 
D)  abduction. 
E)  lysogeny. 
A)  budding. 
B)  transduction. 
C)  penetration. 
D)  abduction. 
E)  lysogeny.

Question 13

Binomial nomenclature is used to name viruses.

Accepted Answer

A) True 
 B)False

Question 14

Continuous cell lines differ from primary cell lines in that

Accepted Answer

A)  continuous cell lines always have to be re-isolated from animal tissues. 
B)  continuous cell lines are derived from primary cell lines. 
C)  viruses can be grown in continuous cell lines. 
D)  continuous cell lines are from human embryos. 
E)  continuous cell lines can be maintained through an indefinite number of generations. 
A)  continuous cell lines always have to be re-isolated from animal tissues. 
B)  continuous cell lines are derived from primary cell lines. 
C)  viruses can be grown in continuous cell lines. 
D)  continuous cell lines are from human embryos. 
E)  continuous cell lines can be maintained through an indefinite number of generations.

Question 15

Most drugs that interfere with viral multiplication also interfere with host cell function.

Accepted Answer

A) True 
 B)False

Question 16

A viroid is a(n)

Accepted Answer

A)  provirus. 
B)  infectious protein. 
C)  capsid without nucleic acid. 
D)  complete, infectious virus particle. 
E)  infectious piece of RNA without a capsid. 
A)  provirus. 
B)  infectious protein. 
C)  capsid without nucleic acid. 
D)  complete, infectious virus particle. 
E)  infectious piece of RNA without a capsid.

Question 17

How do all viruses differ from bacteria?

Accepted Answer

A)  Viruses are not composed of cells. 
B)  Viruses are filterable. 
C)  Viruses are obligate intracellular parasites. 
D)  Viruses do not have any nucleic acid. 
E)  Viruses do not reproduce. 
A)  Viruses are not composed of cells. 
B)  Viruses are filterable. 
C)  Viruses are obligate intracellular parasites. 
D)  Viruses do not have any nucleic acid. 
E)  Viruses do not reproduce.

Question 18

Which of the following places these items in the correct order for DNA-virus replication? 1. Maturation
2) DNA synthesis
3) Transcription
4) Translation

Accepted Answer

A)  2; 3; 4; 1 
B)  4; 3; 2; 1 
C)  3; 4; 1; 2 
D)  4; 1; 2; 3 
E)  1; 2; 3; 4 
A)  2; 3; 4; 1 
B)  4; 3; 2; 1 
C)  3; 4; 1; 2 
D)  4; 1; 2; 3 
E)  1; 2; 3; 4

Question 19

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 20

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.

Exam 13: Viruses, Viroids, and Prions

The basic mechanism of viral multiplication is similar for all viruses.

Figure 13.1 -In Figure 13.1, which structure is a complex virus?

A segmented genome can result in antigenic shift.

A viral species is a group of viruses that

Glycoprotein spikes are found on the capsids of all viruses.

Dogs do not get measles because their cells lack the correct receptor sites for that virus.

Lysogeny can result in all of the following EXCEPT

What contributes to antigenic shift in influenza viruses?

Which of the following is necessary for replication of a prion?

A persistent infection is one in which

Some viruses, such as human herpesvirus 1, infect a cell without causing symptoms. These are called

The mechanism whereby an enveloped virus leaves a host cell is called

Binomial nomenclature is used to name viruses.

Continuous cell lines differ from primary cell lines in that

Most drugs that interfere with viral multiplication also interfere with host cell function.

A viroid is a(n)

How do all viruses differ from bacteria?

Which of the following places these items in the correct order for DNA-virus replication? 1. Maturation 2) DNA synthesis 3) Transcription 4) Translation

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

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

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

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

Innate Immunity: Nonspecific Defenses of the Host

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