Question 1

The process of dissolving the envelope and capsid to release the viral nucleic acid is ______.

Accepted Answer

A) adsorption 
B) penetration 
C) uncoating 
D) synthesis 
E) assembly 
A) adsorption 
B) penetration 
C) uncoating 
D) synthesis 
E) assembly

Question 2

One of the principal viral capsid shapes is a 20-sided figure with 12 evenly spaced corners referred to as a/an _____ capsid.

Accepted Answer

A) spiked 
B) complex 
C) icosahedral 
D) helical 
E) buckeyball 
A) spiked 
B) complex 
C) icosahedral 
D) helical 
E) buckeyball

Question 3

Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific _____ that the immune system produces against the virus.

Accepted Answer

A) glycoproteins 
B) antibodies 
C) complement proteins 
D) antigens 
A) glycoproteins 
B) antibodies 
C) complement proteins 
D) antigens

Question 4

Each virus is classified into a genus based on its host, target tissue, and type of disease it causes.

Accepted Answer

A) True 
 B)False

Question 5

The adeno-associated virus (AAV) and the delta agent are prions.

Accepted Answer

A) True 
 B)False

Question 6

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

Accepted Answer

A) cytoplasm 
B) nucleus 
C) nucleolus 
D) DNA 
E) cell membrane 
A) cytoplasm 
B) nucleus 
C) nucleolus 
D) DNA 
E) cell membrane

Question 7

Which of the following is incorrect about prophages?

Accepted Answer

A) Present when the virus is in lysogeny 
B) Formed when viral DNA enters the bacterial chromosome 
C) Replicated with host DNA and passed on to progeny 
D) Cause lysis of host cells 
E) Occur when temperate phages enter host cells 
A) Present when the virus is in lysogeny 
B) Formed when viral DNA enters the bacterial chromosome 
C) Replicated with host DNA and passed on to progeny 
D) Cause lysis of host cells 
E) Occur when temperate phages enter host cells

Question 8

Viruses exhibit all the following except ______.

Accepted Answer

A) definite shape 
B) metabolism 
C) genes 
D) ability to infect host cells 
E) ultramicroscopic size 
A) definite shape 
B) metabolism 
C) genes 
D) ability to infect host cells 
E) ultramicroscopic size

Question 9

The core of every virus particle always contains ______.

Accepted Answer

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

Question 10

A negative RNA virus must first

Accepted Answer

A) synthesize a DNA copy of its genome. 
B) synthesize a negative RNA copy of its genome. 
C) synthesize a positive RNA copy of its genome. 
D) transcribe reverse transcriptase. 
E) transcribe RNA polymerase. 
A) synthesize a DNA copy of its genome. 
B) synthesize a negative RNA copy of its genome. 
C) synthesize a positive RNA copy of its genome. 
D) transcribe reverse transcriptase. 
E) transcribe RNA polymerase.

Question 11

Viruses are unable to multiply outside of a host cell.

Accepted Answer

A) True 
 B)False

Question 12

What type of phage enters an inactive prophage stage?

Accepted Answer

A) Primary 
B) Secondary 
C) Temperate 
D) Temporary 
E) Transformed 
A) Primary 
B) Secondary 
C) Temperate 
D) Temporary 
E) Transformed

Question 13

What structures are used by bacteriophages to attach to host cell receptors?

Accepted Answer

A) Viral sheaths 
B) Tail fibers 
C) Nucleic acids 
D) Capsid heads 
A) Viral sheaths 
B) Tail fibers 
C) Nucleic acids 
D) Capsid heads

Question 14

Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called ______.

Accepted Answer

A) latent 
B) oncogenic 
C) prions 
D) viroids 
E) delta agents 
A) latent 
B) oncogenic 
C) prions 
D) viroids 
E) delta agents

Question 15

Which of the following represents a virus family name?

Accepted Answer

A) Herpes simplex virus 
B) Herpesviridae 
C) Picornavirus 
D) Enterovirus 
E) Hepatitis B virus 
A) Herpes simplex virus 
B) Herpesviridae 
C) Picornavirus 
D) Enterovirus 
E) Hepatitis B virus

Question 16

Which of the following is not associated with every virus?

Accepted Answer

A) Envelope 
B) Capsomeres 
C) Capsid 
D) Nucleic acid 
E) Genome 
A) Envelope 
B) Capsomeres 
C) Capsid 
D) Nucleic acid 
E) Genome

Question 17

When a virus enters a host cell, the viral genes redirect the genetic and metabolic activities of the host cell.

Accepted Answer

A) True 
 B)False

Question 18

Viral nomenclature uses the same system as living organisms; a genus and specific epithet is designated for each virus.

Accepted Answer

A) True 
 B)False

Question 19

Animal viruses have the ability to attach to and enter almost any animal host cell.

Accepted Answer

A) True 
 B)False

Question 20

How are viroids transmitted?

Accepted Answer

A) Respiratory secretions 
B) Sex 
C) Plant seeds 
D) Blood products 
A) Respiratory secretions 
B) Sex 
C) Plant seeds 
D) Blood products

Exam 6: An Introduction to the Viruses

The process of dissolving the envelope and capsid to release the viral nucleic acid is ______.

One of the principal viral capsid shapes is a 20-sided figure with 12 evenly spaced corners referred to as a/an _____ capsid.

Diagnosis of viral infections sometimes involves analyzing the patient's blood for specific _____ that the immune system produces against the virus.

Each virus is classified into a genus based on its host, target tissue, and type of disease it causes.

The adeno-associated virus (AAV) and the delta agent are prions.

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

Which of the following is incorrect about prophages?

Viruses exhibit all the following except ______.

The core of every virus particle always contains ______.

A negative RNA virus must first

Viruses are unable to multiply outside of a host cell.

What type of phage enters an inactive prophage stage?

What structures are used by bacteriophages to attach to host cell receptors?

Viruses that cause infection resulting in alternating periods of activity with symptoms and inactivity without symptoms are called ______.

Which of the following represents a virus family name?

Which of the following is not associated with every virus?

When a virus enters a host cell, the viral genes redirect the genetic and metabolic activities of the host cell.

Viral nomenclature uses the same system as living organisms; a genus and specific epithet is designated for each virus.

Animal viruses have the ability to attach to and enter almost any animal host cell.

How are viroids transmitted?

The Main Themes of Microbiology

The Chemistry of Biology

Tools of the Laboratory: Methods for the Culturing of Microscopic Analysis of Microorganisms

Bacteria and Archaea

Eukaryotic Cells and Microorganisms

Microbial Nutrition, Ecology, and Growth

Microbial Metabolism: The Chemical Crossroads of Life

Microbial Genetics

Genetic Engineering and Recombinant Dna

Physical and Chemical Control of Microbes

Antimicrobial Treatment

Microbe-Human Interactions: Health and Disease

Host Defenses I: Overview and Nonspecific Defenses

Host Defenses II: Specific Immunity and Immunization

Disorders in Immunity

Diagnosing Infections

Infectious Diseases Affecting the Skin and Eyes

Infectious Diseases Affecting the Nervous System

Infectious Diseases Affecting the Cardiovascular and Lymphatic Systems

Infectious Diseases Affecting the Respiratory System

Infectious Diseases Affecting the Gastrointestinal Tract

Infectious Diseases Affecting the Genitourinary System

Microbes and the Environment

Applied Microbiology and Food and Water Safety

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