Question 1

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

Accepted Answer

1. Non-cellular structure: Unlike other

Question 2

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 3

The nucleocapsid consists of

Accepted Answer

A) the capsomers assembled into the capsid. 
B) the nucleic acid of the virus only. 
C) the nucleic acid along with the capsid. 
D) the envelope and capsid. 
E) the envelope, nucleic acid, and capsid. 
A) the capsomers assembled into the capsid. 
B) the nucleic acid of the virus only. 
C) the nucleic acid along with the capsid. 
D) the envelope and capsid. 
E) the envelope, nucleic acid, and capsid.

Question 4

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 5

Discuss the criteria used for classifying viruses into families and genera.

Accepted Answer

Viruses are classified into families and

Question 6

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 7

Which of the following viruses did D. Ivanovski and M. Beijerinck work with?

Accepted Answer

A) Rabies 
B) Smallpox 
C) Tobacco Mosaic Virus 
D) Herpes 
E) Epstein-Barr virus 
A) Rabies 
B) Smallpox 
C) Tobacco Mosaic Virus 
D) Herpes 
E) Epstein-Barr virus

Question 8

Discuss why it is difficult to trace the origins of viruses and why they are important.

Accepted Answer

Tracing the origins of viruses can be di

Question 9

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 10

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 11

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) 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 12

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 13

Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes called

Accepted Answer

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

Question 14

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 15

A common method for cultivating viruses in the lab is to use in vitro systems called _____ cultures.

Accepted Answer

The answer of A common method for cultivating viruses in...

Question 16

Which of the following is correct about viruses?

Accepted Answer

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

Question 17

The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is

Accepted Answer

A) adsorption to the host cells. 
B) injection of the viral nucleic acid into the host cell. 
C) host cell synthesis of viral enzymes and capsid proteins. 
D) assembly of nucleocapsids. 
E) replication of viral nucleic acid. 
A) adsorption to the host cells. 
B) injection of the viral nucleic acid into the host cell. 
C) host cell synthesis of viral enzymes and capsid proteins. 
D) assembly of nucleocapsids. 
E) replication of viral nucleic acid.

Question 18

Bacteriophages do not undergo adsorption to specific host cell receptors prior to penetration.

Accepted Answer

A) True 
 B)False

Question 19

Spikes are glycoproteins of the virus capsid.

Accepted Answer

A) True 
 B)False

Question 20

No cases of variant Creutzfeldt-Jakob syndrome linked to eating infected cows have occurred in the United States.

Accepted Answer

A) True 
 B)False

Exam 6: An Introduction to Viruses

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

Infectious naked strands of RNA are called

The nucleocapsid consists of

Which of the following will not support viral cultivation?

Discuss the criteria used for classifying viruses into families and genera.

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 viruses did D. Ivanovski and M. Beijerinck work with?

Discuss why it is difficult to trace the origins of viruses and why they are important.

Viruses belong to which of the following Kingdoms?

The core of every virus particle always contains

Which is incorrect about prophages?

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

Viral growth in bird embryos can cause discrete, opaque spots in the embryonic membranes called

Viruses acquire envelopes around their nucleocapsids during

A common method for cultivating viruses in the lab is to use in vitro systems called _____ cultures.

Which of the following is correct about viruses?

The event that occurs in bacteriophage multiplication that does not occur in animal virus replication is

Bacteriophages do not undergo adsorption to specific host cell receptors prior to penetration.

Spikes are glycoproteins of the virus capsid.

No cases of variant Creutzfeldt-Jakob syndrome linked to eating infected cows have occurred in the United States.

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

An Introduction to 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, Disease, and Epidemiology

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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