Question 1

Two noncellular agents, smaller than viruses, are the infectious proteins called _____, and the infectious RNA strands called _____.

Accepted Answer

prions; viroids

Question 2

How do enveloped animal viruses exit their host?

Accepted Answer

A)  budding or exocytosis 
B)  bursting the host cell 
C)  rupturing the virus 
D)  endocytosis 
A)  budding or exocytosis 
B)  bursting the host cell 
C)  rupturing the virus 
D)  endocytosis A

Question 3

The International Committee on Taxonomy of Viruses has determined that there are only three orders of viruses.

Accepted Answer

A) True 
 B)False  False

Question 4

All of the following are characteristics of viruses except

Accepted Answer

A)  they can be crystallized. 
B)  they often have a geometric capsid. 
C)  they have a viscous fluid inside their capsids. 
D)  they can cause fatal diseases. 
E)  they can cause mild diseases. 
A)  they can be crystallized. 
B)  they often have a geometric capsid. 
C)  they have a viscous fluid inside their capsids. 
D)  they can cause fatal diseases. 
E)  they can cause mild diseases.

Question 5

During lysogeny, an inactive prophage state occurs when the viral DNA is inserted into the _________.

Accepted Answer

bacterial

Question 6

Which of the following will not support viral cultivation?

Accepted Answer

A)  live lab animals 
B)  embryonated bird eggs 
C)  primary cell cultures 
D)  continuous cell cultures 
E)  blood agar 
A)  live lab animals 
B)  embryonated bird eggs 
C)  primary cell cultures 
D)  continuous cell cultures 
E)  blood agar

Question 7

Viruses that consist of only a nucleocapsid are considered

Accepted Answer

A)  simple viruses. 
B)  complex viruses. 
C)  naked viruses. 
D)  viroids. 
E)  incomplete viruses. 
A)  simple viruses. 
B)  complex viruses. 
C)  naked viruses. 
D)  viroids. 
E)  incomplete viruses.

Question 8

The core of every virus particle always contains

Accepted Answer

A)  DNA. 
B)  capsomers. 
C)  enzymes. 
D)  DNA and RNA. 
E)  either DNA or RNA. 
A)  DNA. 
B)  capsomers. 
C)  enzymes. 
D)  DNA and RNA. 
E)  either DNA or RNA.

Question 9

Noneveloped viruses enter their animal host cell via an active process that requires the participation of the animal cell.

Accepted Answer

A) True 
 B)False

Question 10

Viruses belong to which of the following Kingdoms?

Accepted Answer

A)  Protists 
B)  Fungi 
C)  Archaea 
D)  Bacteria 
E)  None of the choices are correct. 
A)  Protists 
B)  Fungi 
C)  Archaea 
D)  Bacteria 
E)  None of the choices are correct.

Question 11

Which of the following is correct about viruses?

Accepted Answer

A)  Most viruses cannot be seen with a light microscope. 
B)  Viruses are prokaryotic. 
C)  Viruses contain 70S ribosomes. 
D)  Viruses undergo binary fission. 
E)  Viruses can be grown on nutrient agar. 
A)  Most viruses cannot be seen with a light microscope. 
B)  Viruses are prokaryotic. 
C)  Viruses contain 70S ribosomes. 
D)  Viruses undergo binary fission. 
E)  Viruses can be grown on nutrient agar.

Question 12

Viral capsids are made from subunits called

Accepted Answer

A)  envelopes. 
B)  spikes. 
C)  capsomers. 
D)  prophages. 
E)  peplomers. 
A)  envelopes. 
B)  spikes. 
C)  capsomers. 
D)  prophages. 
E)  peplomers.

Question 13

The virus-induced, specific damage to the host cell that can be seen in a light microscope is called

Accepted Answer

A)  lysogeny. 
B)  budding. 
C)  plaques. 
D)  cytopathic effect. 
E)  pocks. 
A)  lysogeny. 
B)  budding. 
C)  plaques. 
D)  cytopathic effect. 
E)  pocks.

Question 14

The descriptive groupings of virus into categories such as icosahedral and helical are based on

Accepted Answer

A)  the type of nucleic acid. 
B)  the shape of the nucleocapsid. 
C)  the presence or absence of an envelope. 
D)  the mechanism of entry into host cells. 
A)  the type of nucleic acid. 
B)  the shape of the nucleocapsid. 
C)  the presence or absence of an envelope. 
D)  the mechanism of entry into host cells.

Question 15

In general, most DNA viruses multiply in the host cell's _____, while most RNA viruses multiply in the host cell's _____.

Accepted Answer

A)  nucleus; cytopl 
B)  cytopl; cell membrane 
C)  cell membrane; cytopl 
D)  cytopl; nucleus 
E)  nucleus; endoplic reticulum 
A)  nucleus; cytopl 
B)  cytopl; cell membrane 
C)  cell membrane; cytopl 
D)  cytopl; nucleus 
E)  nucleus; endoplic reticulum

Question 16

What tool or technique used by Ivanowski and Beijerinck while studying diseased tobacco plants enabled them to determine that the disease was caused by an agent significantly smaller than bacteria?

Accepted Answer

A)  scanning electron microscopy that enabled them to view the virus the tobacco mosaic virus 
B)  transmission electron microscopy that allowed them to view the tobacco mosaic virus 
C)  porcelain filters that trapped bacteria but allowed passage of the virus 
D)  cell culture that enabled cultivation of the virus 
A)  scanning electron microscopy that enabled them to view the virus the tobacco mosaic virus 
B)  transmission electron microscopy that allowed them to view the tobacco mosaic virus 
C)  porcelain filters that trapped bacteria but allowed passage of the virus 
D)  cell culture that enabled cultivation of the virus

Question 17

Which type of virus is most likely to cause the immediate damage and destruction of an infected animal cell when it is released?

Accepted Answer

A)  enveloped virus 
B)  RNA virus 
C)  nonenveloped virus 
D)  DNA virus 
A)  enveloped virus 
B)  RNA virus 
C)  nonenveloped virus 
D)  DNA virus

Question 18

Viruses are ultramicroscopic because they range in size from 2 mm to 450 mm.

Accepted Answer

A) True 
 B)False

Question 19

Which of the following is not associated with every virus?

Accepted Answer

A)  envelope 
B)  capsomers 
C)  capsid 
D)  nucleic acid 
E)  Genome 
A)  envelope 
B)  capsomers 
C)  capsid 
D)  nucleic acid 
E)  Genome

Question 20

Uncoating of viral nucleic acid

Accepted Answer

A)  does not occur in bacteriophage multiplication. 
B)  involves enzymatic destruction of the capsid. 
C)  occurs during penetration in the multiplication cycle. 
D)  occurs before replication. 
E)  All of these choices are correct. 
A)  does not occur in bacteriophage multiplication. 
B)  involves enzymatic destruction of the capsid. 
C)  occurs during penetration in the multiplication cycle. 
D)  occurs before replication. 
E)  All of these choices are correct.

Exam 6: An Introduction to Viruses

Two noncellular agents, smaller than viruses, are the infectious proteins called _____, and the infectious RNA strands called _____.

How do enveloped animal viruses exit their host?

The International Committee on Taxonomy of Viruses has determined that there are only three orders of viruses.

All of the following are characteristics of viruses except

During lysogeny, an inactive prophage state occurs when the viral DNA is inserted into the _________.

Which of the following will not support viral cultivation?

Viruses that consist of only a nucleocapsid are considered

The core of every virus particle always contains

Noneveloped viruses enter their animal host cell via an active process that requires the participation of the animal cell.

Viruses belong to which of the following Kingdoms?

Which of the following is correct about viruses?

Viral capsids are made from subunits called

The virus-induced, specific damage to the host cell that can be seen in a light microscope is called

The descriptive groupings of virus into categories such as icosahedral and helical are based on

In general, most DNA viruses multiply in the host cell's _____, while most RNA viruses multiply in the host cell's _____.

What tool or technique used by Ivanowski and Beijerinck while studying diseased tobacco plants enabled them to determine that the disease was caused by an agent significantly smaller than bacteria?

Which type of virus is most likely to cause the immediate damage and destruction of an infected animal cell when it is released?

Viruses are ultramicroscopic because they range in size from 2 mm to 450 mm.

Which of the following is not associated with every virus?

Uncoating of viral nucleic acid

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods of Studying Microorganisms

A Survey of Prokaryotic Cells and Microorganisms

A Survey of Eukaryotic Cells and Microorganisms

Microbial Nutrition, Ecology, and Growth

An Introduction to Microbial Metabolism: the Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering: a Revolution in Molecular Biology

Physical and Chemical Agents for Microbial Control

Drugs, Microbes, Host--The Elements of Chemotherapy

Microbe-Human Interactions: Infection and Disease

An Introduction to Host Defenses and Innate Immunities

Adaptive, Specific Immunity and Immunization

Disorders in Immunity

Procedures for Identifying Pathogens and Diagnosing Infections

The Gram-Positive and Gram-Negative Cocci of Medical Importance

The Gram-Positive Bacilli of Medical Importance

The Gram-Negative Bacilli of Medical Importance

Miscellaneous Bacterial Agents of Disease

The Fungi of Medical Importance

The Parasites of Medical Importance

Introduction to Viruses That Infect Humans: the Dna Viruses

The Rna Viruses That Infect Humans

Environmental Microbiology

Applied and Industrial Microbiology

Filters

Two noncellular agents, smaller than viruses, are the infectious proteins called _, and the infectious RNA strands called _.

In general, most DNA viruses multiply in the host cell's _, while most RNA viruses multiply in the host cell's _.