Question 1

Most viruses cannot be seen by light microscopy.

Accepted Answer

A) True 
 B)False

Question 2

A viral infection which does not result in the production of new virions is ________ infection(s).

Accepted Answer

A)  a lytic 
B)  a latent 
C)  a persistent 
D)  a lysogenic 
E)  either latent or lysogenic 
A)  a lytic 
B)  a latent 
C)  a persistent 
D)  a lysogenic 
E)  either latent or lysogenic

Question 3

Replication of most ________ viruses is similar to normal cellular processes.

Accepted Answer

A)  dsDNA 
B)  ssDNA 
C)  +ssRNA 
D)  -ssRNA 
E)  dsRNA 
A)  dsDNA 
B)  ssDNA 
C)  +ssRNA 
D)  -ssRNA 
E)  dsRNA

Question 4

Host specificity of a virus is due to

Accepted Answer

A)  particular genes that it shares with the infected cell. 
B)  the presence of an envelope. 
C)  differences in size between the virus and the host cell. 
D)  the presence or absence of a cell wall on the host cell. 
E)  interactions between viral and cellular surface molecules. 
A)  particular genes that it shares with the infected cell. 
B)  the presence of an envelope. 
C)  differences in size between the virus and the host cell. 
D)  the presence or absence of a cell wall on the host cell. 
E)  interactions between viral and cellular surface molecules.

Question 5

Viroids infect

Accepted Answer

A)  bacteria. 
B)  plants. 
C)  fungi. 
D)  plants and animals. 
E)  all organisms. 
A)  bacteria. 
B)  plants. 
C)  fungi. 
D)  plants and animals. 
E)  all organisms.

Question 6

Viral capsids are composed of subunits called (capsomeres/nucleocapsids/prions).

Accepted Answer

The answer of Viral capsids are composed of subunits called...

Question 7

Which of the following agents is capable of inducing conversion of a prophage to the lytic cycle?

Accepted Answer

A)  UV light 
B)  X rays 
C)  presence of +ssRNA 
D)  both UV light and X rays 
E)  both UV light and the presence of +ssRNA 
A)  UV light 
B)  X rays 
C)  presence of +ssRNA 
D)  both UV light and X rays 
E)  both UV light and the presence of +ssRNA

Question 8

Attachment of herpesviruses results in ________, a process in which the host cell facilitates viral entry.

Accepted Answer

A)  direct penetration 
B)  membrane fusion 
C)  endocytosis 
D)  exocytosis 
E)  lysogeny 
A)  direct penetration 
B)  membrane fusion 
C)  endocytosis 
D)  exocytosis 
E)  lysogeny

Question 9

What is a virion?

Accepted Answer

A)  a virus genome inside a cell 
B)  an empty capsid 
C)  a single virus particle outside a cell 
D)  an extracellular virus genome 
E)  a virus genome integrated into a host cell genome 
A)  a virus genome inside a cell 
B)  an empty capsid 
C)  a single virus particle outside a cell 
D)  an extracellular virus genome 
E)  a virus genome integrated into a host cell genome

Question 10

A cell is infected with a virus carrying an oncogene sequence in its genome. What process may occur if the oncogene is expressed in the infected cell?

Accepted Answer

A)  lysis 
B)  neoplasia 
C)  lysogeny 
D)  latency 
E)  both lysis and neoplasia 
A)  lysis 
B)  neoplasia 
C)  lysogeny 
D)  latency 
E)  both lysis and neoplasia

Question 11

Which of the following membranes can give rise to a viral envelope?

Accepted Answer

A)  the nuclear membrane 
B)  the cytoplasmic membrane 
C)  the endoplasmic reticulum 
D)  the nuclear and cytoplasmic membranes 
E)  the nuclear and cytoplasmic membranes and the endoplasmic reticulum 
A)  the nuclear membrane 
B)  the cytoplasmic membrane 
C)  the endoplasmic reticulum 
D)  the nuclear and cytoplasmic membranes 
E)  the nuclear and cytoplasmic membranes and the endoplasmic reticulum

Question 12

Uncontrolled cell division in animals is known as (metastasis/neoplasia/cancer).

Accepted Answer

The answer of Uncontrolled cell division in animals is known...

Question 13

The ________ of a virion determines the type of cell it enters.

Accepted Answer

A)  nucleic acid 
B)  matrix proteins 
C)  glycoproteins 
D)  lipid molecules 
E)  shape 
A)  nucleic acid 
B)  matrix proteins 
C)  glycoproteins 
D)  lipid molecules 
E)  shape

Question 14

A(n) ________ is a virus that infects bacterial cells.

Accepted Answer

A)  virion 
B)  prion 
C)  bacteriophage 
D)  nucleocapsid 
E)  envelope 
A)  virion 
B)  prion 
C)  bacteriophage 
D)  nucleocapsid 
E)  envelope

Question 15

Viruses cause most human cancers.

Accepted Answer

A) True 
 B)False

Question 16

The stage of virus infection called (assembly/entry/synthesis) is the stage most dependent on host cell proteins.

Accepted Answer

The answer of The stage of virus infection called (assembly/entry/synthesis)...

Question 17

Seven (orders/families/classes) represent the highest level of taxonomic rank used in classifying viruses.

Accepted Answer

The answer of Seven (orders/families/classes) represent the highest level of...

Question 18

Which of the following is NOT used for the classification of viruses?

Accepted Answer

A)  genus 
B)  class 
C)  specific epithet 
D)  family 
E)  order 
A)  genus 
B)  class 
C)  specific epithet 
D)  family 
E)  order

Question 19

Prions are composed of a single protein called (plaque/BSE/PrP).

Accepted Answer

The answer of Prions are composed of a single protein...

Question 20

Which of the following is a feature shared by viruses and living organisms?

Accepted Answer

A)  possession of a genome that directs synthesis of materials necessary for replication 
B)  presence of cytoplasm 
C)  metabolic capability 
D)  responsiveness 
E)  the ability to increase in size 
A)  possession of a genome that directs synthesis of materials necessary for replication 
B)  presence of cytoplasm 
C)  metabolic capability 
D)  responsiveness 
E)  the ability to increase in size

Exam 13: Characterizing and Classifying Viruses, Viroids, and Prions

Most viruses cannot be seen by light microscopy.

A viral infection which does not result in the production of new virions is ________ infection(s).

Replication of most ________ viruses is similar to normal cellular processes.

Host specificity of a virus is due to

Viroids infect

Viral capsids are composed of subunits called (capsomeres/nucleocapsids/prions).

Which of the following agents is capable of inducing conversion of a prophage to the lytic cycle?

Attachment of herpesviruses results in ________, a process in which the host cell facilitates viral entry.

What is a virion?

A cell is infected with a virus carrying an oncogene sequence in its genome. What process may occur if the oncogene is expressed in the infected cell?

Which of the following membranes can give rise to a viral envelope?

Uncontrolled cell division in animals is known as (metastasis/neoplasia/cancer).

The ________ of a virion determines the type of cell it enters.

A(n) ________ is a virus that infects bacterial cells.

Viruses cause most human cancers.

The stage of virus infection called (assembly/entry/synthesis) is the stage most dependent on host cell proteins.

Seven (orders/families/classes) represent the highest level of taxonomic rank used in classifying viruses.

Which of the following is NOT used for the classification of viruses?

Prions are composed of a single protein called (plaque/BSE/PrP).

Which of the following is a feature shared by viruses and living organisms?

A Brief History of Microbiology

The Chemistry of Microbiology

Cell Structure and Function

Microscopy, Staining, and Classification

Microbial Metabolism

Microbial Nutrition and Growth

Microbial Genetics

Recombinant DNA Technology

Controlling Microbial Growth in the Environment

Controlling Microbial Growth in the Body: Antimicrobial Drugs

Characterizing and Classifying Prokaryotes

Characterizing and Classifying Eukaryotes

Infection, Infectious Diseases, and Epidemiology

Innate Immunity

Adaptive Immunity

Immunization and Immune Testing

Immune Disorders

Microbial Diseases of the Skin and Wounds

Microbial Diseases of the Nervous System and Eyes

Microbial Cardiovascular and Systemic Diseases

Microbial Diseases of the Respiratory System

Microbial Diseases of the Digestive System

Microbial Diseases of the Urinary and Reproductive Systems

Applied and Industrial Microbiology

Microbial Ecology and Microbiomes

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