Question 1

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 2

While of the following techniques or tools has provided information regarding the nature of viruses, which one had to be developed before the genetics, biochemistry, and life cycles of viruses could be thoroughly studied?

Accepted Answer

A)  scanning electron microscopy 
B)  viral cultivation techniques 
C)  transmission electron microscopy 
D)  serological techniques 
A)  scanning electron microscopy 
B)  viral cultivation techniques 
C)  transmission electron microscopy 
D)  serological techniques

Question 3

Infectious protein particles are called

Accepted Answer

A)  viroids. 
B)  phages. 
C)  prions. 
D)  oncogenic viruses. 
E)  spikes. 
A)  viroids. 
B)  phages. 
C)  prions. 
D)  oncogenic viruses. 
E)  spikes.

Question 4

Viruses that infect bacteria are specifically called _____.

Accepted Answer

The answer of Viruses that infect bacteria are specifically called...

Question 5

Discuss at least six characteristics that are unique to viruses compared to other microorganisms.

Accepted Answer

1. Non-cellular structure: Unlike other

Question 6

Prophages can be activated into viral replication and enter the lytic cycle.

Accepted Answer

A) True 
 B)False

Question 7

Which body system is mainly affected by Creutzfeldt-Jakob disease?

Accepted Answer

A)  digestive system 
B)  genitourinary system 
C)  nervous system 
D)  circulatory system 
E)  respiratory system 
A)  digestive system 
B)  genitourinary system 
C)  nervous system 
D)  circulatory system 
E)  respiratory system

Question 8

Creutzfeldt-Jakob disease is

Accepted Answer

A)  caused by a chronic latent virus. 
B)  initiated by an oncogenic virus. 
C)  caused by a viroid. 
D)  a spongiform encephalopathy of humans. 
E)  also called "Mad Cow disease". 
A)  caused by a chronic latent virus. 
B)  initiated by an oncogenic virus. 
C)  caused by a viroid. 
D)  a spongiform encephalopathy of humans. 
E)  also called "Mad Cow disease".

Question 9

Viruses acquire envelopes around their nucleocapsids during

Accepted Answer

A)  replication. 
B)  assembly. 
C)  adsorption. 
D)  release. 
E)  penetration. 
A)  replication. 
B)  assembly. 
C)  adsorption. 
D)  release. 
E)  penetration.

Question 10

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

Accepted Answer

The answer of Diagnosis of viral infections sometimes involves analyzing...

Question 11

Which of the following parts of a virus is/are not always present?

Accepted Answer

A)  envelope 
B)  nucleic acid 
C)  capsid 
D)  capsomers 
E)  None of these choices are optional parts of a virus. 
A)  envelope 
B)  nucleic acid 
C)  capsid 
D)  capsomers 
E)  None of these choices are optional parts of a virus.

Question 12

Infectious naked strands of RNA are called

Accepted Answer

A)  viroids. 
B)  phages. 
C)  prions. 
D)  oncogenic viruses. 
E)  spikes. 
A)  viroids. 
B)  phages. 
C)  prions. 
D)  oncogenic viruses. 
E)  spikes.

Question 13

Spikes are glycoproteins of the virus capsid.

Accepted Answer

A) True 
 B)False

Question 14

All of the following pertain to virus envelopes except they

Accepted Answer

A)  are gained as a virus leaves the host cell membrane. 
B)  are found primarily on animal viruses. 
C)  contain special virus proteins. 
D)  help the virus particle attach to host cells. 
E)  are located between the capsid and nucleic acid. 
A)  are gained as a virus leaves the host cell membrane. 
B)  are found primarily on animal viruses. 
C)  contain special virus proteins. 
D)  help the virus particle attach to host cells. 
E)  are located between the capsid and nucleic acid.

Question 15

Compare and contrast viruses, prions, and viroids.

Accepted Answer

Viruses, prions, and viroids are all inf

Question 16

Viral replication can involve the copying of RNA in an RNA virus.

Accepted Answer

A) True 
 B)False

Question 17

The correct sequence of events in viral multiplication is

Accepted Answer

A)  penetration, replication, maturation, adsorption, assembly, release. 
B)  replication, penetration, maturation, assembly, absorption, release. 
C)  adsorption, penetration, replication, maturation, assembly, release. 
D)  assembly, maturation, replication, release, penetration, adsorption. 
E)  adsorption, release, maturation, replication, assembly, penetration. 
A)  penetration, replication, maturation, adsorption, assembly, release. 
B)  replication, penetration, maturation, assembly, absorption, release. 
C)  adsorption, penetration, replication, maturation, assembly, release. 
D)  assembly, maturation, replication, release, penetration, adsorption. 
E)  adsorption, release, maturation, replication, assembly, penetration.

Question 18

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 19

Which 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)  always lyse the 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)  always lyse the host cells 
E)  occur when temperate phages enter host cells

Question 20

Helical and icosahedral are terms used to describe the shapes of a virus

Accepted Answer

A)  spike. 
B)  capsomere. 
C)  envelope. 
D)  capsid. 
E)  core. 
A)  spike. 
B)  capsomere. 
C)  envelope. 
D)  capsid. 
E)  core.

Exam 6: An Introduction to Viruses

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

While of the following techniques or tools has provided information regarding the nature of viruses, which one had to be developed before the genetics, biochemistry, and life cycles of viruses could be thoroughly studied?

Infectious protein particles are called

Viruses that infect bacteria are specifically called _____.

Discuss at least six characteristics that are unique to viruses compared to other microorganisms.

Prophages can be activated into viral replication and enter the lytic cycle.

Which body system is mainly affected by Creutzfeldt-Jakob disease?

Creutzfeldt-Jakob disease is

Viruses acquire envelopes around their nucleocapsids during

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

Which of the following parts of a virus is/are not always present?

Infectious naked strands of RNA are called

Spikes are glycoproteins of the virus capsid.

All of the following pertain to virus envelopes except they

Compare and contrast viruses, prions, and viroids.

Viral replication can involve the copying of RNA in an RNA virus.

The correct sequence of events in viral multiplication is

Which of the following represents a virus family name?

Which is incorrect about prophages?

Helical and icosahedral are terms used to describe the shapes of a virus

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

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