Question 1

The capsomers are made of

Accepted Answer

A) DNA. 
B) RNA. 
C) lipids. 
D) protein. 
E) carbohydrate. 
A) DNA. 
B) RNA. 
C) lipids. 
D) protein. 
E) carbohydrate.

Question 2

Host range is limited by the

Accepted Answer

A) type of nucleic acid in the virus. 
B) age of the host cell. 
C) type of host cell receptors on cell membrane. 
D) size of the host cell. 
E) All of these choices are correct. 
A) type of nucleic acid in the virus. 
B) age of the host cell. 
C) type of host cell receptors on cell membrane. 
D) size of the host cell. 
E) All of these choices are correct.

Question 3

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 4

Viruses that infect bacteria are specifically called _____.

Accepted Answer

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

Question 5

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 6

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 7

All of the following are characteristics of viruses 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 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

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.

Question 10

Compare and contrast the steps of viral multiplication cycles in bacteriophages and animal viruses.

Accepted Answer

The steps of viral multiplication cycles

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

Compare and contrast viruses, prions, and viroids.

Accepted Answer

Viruses, prions, and viroids are all inf

Question 13

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

Accepted Answer

The answer of Two noncellular agents, smaller than viruses, are...

Question 14

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 15

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 16

Spikes are glycoproteins of the virus capsid.

Accepted Answer

A) True 
 B)False

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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 19

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 20

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

Accepted Answer

Viruses are classified into families and

Exam 6: An Introduction to Viruses

The capsomers are made of

Host range is limited by the

The core of every virus particle always contains

Viruses that infect bacteria are specifically called _____.

Viruses that consist of only a nucleocapsid are considered

Infectious protein particles are called

All of the following are characteristics of viruses except

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

Uncoating of viral nucleic acid

Compare and contrast the steps of viral multiplication cycles in bacteriophages and animal viruses.

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

Compare and contrast viruses, prions, and viroids.

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

The nucleocapsid consists of

Infectious naked strands of RNA are called

Spikes are glycoproteins of the virus capsid.

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

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

Which of the following represents a virus family name?

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

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