Question 1

A capsomere is

Accepted Answer

A) A protective protein shell surrounding nucleic acid 
B) The complete viral particle 
C) A phospholipid bilayer that contains glycoproteins 
D) A protein molecule that forms the capsid 
E) The sum of the nucleic acid and the capsid 
A) A protective protein shell surrounding nucleic acid 
B) The complete viral particle 
C) A phospholipid bilayer that contains glycoproteins 
D) A protein molecule that forms the capsid 
E) The sum of the nucleic acid and the capsid D

Question 2

What is the composition of viruses?

Accepted Answer

A) Proteins and enzymes 
B) Proteins and genetic material 
C) Enzymes and genetic material 
D) None of the choices 
E) All of the choices 
A) Proteins and enzymes 
B) Proteins and genetic material 
C) Enzymes and genetic material 
D) None of the choices 
E) All of the choices B

Question 3

Which of these processes is not used by viruses to spread within a host?

Accepted Answer

A) Syncytia 
B) The production of decoy virions to confuse and distract the host defenses 
C) Movement through the apical surface of epithelial cells to spread to neighboring cells 
D) Transportation by microtubules 
E) Lysis of the host cell 
A) Syncytia 
B) The production of decoy virions to confuse and distract the host defenses 
C) Movement through the apical surface of epithelial cells to spread to neighboring cells 
D) Transportation by microtubules 
E) Lysis of the host cell D

Question 4

Regions on the host cell's plasma membrane rich in cholesterol and particular types of fatty acids to which some viruses attach are called

Accepted Answer

A) Syncytia 
B) Protein coats 
C) Capsomeres 
D) Lipid rafts 
A) Syncytia 
B) Protein coats 
C) Capsomeres 
D) Lipid rafts

Question 5

Why is the capsid an important part of the structure of the virus?

Accepted Answer

A) It allows for the virion to withstand harsh environments until it infects a cell 
B) It is easily shed when the virion enters into the host cell 
C) It selectively allows certain agents to penetrate the coat and enter into the virion 
D) It allows the virion to withstand harsh environments and is easily shed when it enters the host cell 
E) It allows the virion to withstand harsh environments and selectively allows certain agents to penetrate the coat and enter the virion 
A) It allows for the virion to withstand harsh environments until it infects a cell 
B) It is easily shed when the virion enters into the host cell 
C) It selectively allows certain agents to penetrate the coat and enter into the virion 
D) It allows the virion to withstand harsh environments and is easily shed when it enters the host cell 
E) It allows the virion to withstand harsh environments and selectively allows certain agents to penetrate the coat and enter the virion

Question 6

The _____ is the protein that is located between the capsid and the nucleocapsid of some enveloped viruses.

Accepted Answer

A) Glycoprotein spike 
B) Icosahedron 
C) Helix 
D) Tegument 
E) Nucleic acid-binding protein 
A) Glycoprotein spike 
B) Icosahedron 
C) Helix 
D) Tegument 
E) Nucleic acid-binding protein

Question 7

A nucleocapsid

Accepted Answer

A) A protective protein shell surrounding nucleic acid 
B) The complete viral particle 
C) A phospholipid bilayer that contains glycoproteins 
D) A protein molecule that forms the capsid 
E) The sum of the nucleic acid and the capsid 
A) A protective protein shell surrounding nucleic acid 
B) The complete viral particle 
C) A phospholipid bilayer that contains glycoproteins 
D) A protein molecule that forms the capsid 
E) The sum of the nucleic acid and the capsid

Question 8

Reverse transcriptase is an enzyme that

Accepted Answer

A) Is provided by the host cell 
B) Is virally encoded and must be synthesized immediately after infection by (-) single-stranded RNA viruses 
C) Is carried within retroviruses and can function immediately after infection 
D) Copies viral DNA into (+) RNA 
A) Is provided by the host cell 
B) Is virally encoded and must be synthesized immediately after infection by (-) single-stranded RNA viruses 
C) Is carried within retroviruses and can function immediately after infection 
D) Copies viral DNA into (+) RNA

Question 9

Enveloped viral structure
Use the figure below to answer the following questions.
  
-In the figure which letter (A-D)indicates the RNA or DNA?

Accepted Answer

The answer of Enveloped viral structure
Use the figure below to...

Question 10

Explain the difference between helical and icosahedral symmetry.Provide an example of each.

Accepted Answer

Helical symmetry is associated with viru

Question 11

Enveloped viral structure
Use the figure below to answer the following questions.
  
-In the figure which letter (A-D)indicates the part that will eventually fuse with the host cell plasma membrane?

Accepted Answer

The answer of Enveloped viral structure
Use the figure below to...

Question 12

Enveloped viral structure
Use the figure below to answer the following questions.
  
-In the figure which letter (A-D)indicates neuraminidase or hemagglutinin?

Accepted Answer

The answer of Enveloped viral structure
Use the figure below to...

Question 13

Identify the sequence of events that occurs during the lytic cycle of an animal virus infection.Describe in basic terms what takes place at each step.

Accepted Answer

The steps of the lytic cycle of infectio

Question 14

Retroviruses contain _____ which catalyzes the synthesis of DNA encoded by their RNA.

Accepted Answer

A) Reverse transcriptase 
B) RNA polymerase 
C) DNA polymerase 
D) RNA transcriptase 
E) RNA replicase 
A) Reverse transcriptase 
B) RNA polymerase 
C) DNA polymerase 
D) RNA transcriptase 
E) RNA replicase

Question 15

Enveloped viral structure
Use the figure below to answer the following questions.
  
-In the figure which letter (A-D)indicates the matrix protein?

Accepted Answer

The answer of Enveloped viral structure
Use the figure below to...

Question 16

A capsid is

Accepted Answer

A) A protective protein shell surrounding nucleic acid 
B) The complete viral particle 
C) A phospholipid bilayer that contains glycoproteins 
D) A protein molecule that forms the capsid 
E) The sum of the nucleic acid and the capsid 
A) A protective protein shell surrounding nucleic acid 
B) The complete viral particle 
C) A phospholipid bilayer that contains glycoproteins 
D) A protein molecule that forms the capsid 
E) The sum of the nucleic acid and the capsid

Question 17

Endosomes that assist in the uncoating of non-enveloped viruses function via

Accepted Answer

A) Hydrolytic enzymes 
B) An acidic environment 
C) Host proteases 
D) Virally encoded lipases 
E) Fusion pores 
A) Hydrolytic enzymes 
B) An acidic environment 
C) Host proteases 
D) Virally encoded lipases 
E) Fusion pores

Question 18

How does a simple icosahedral virus differ from a complex icosahedral virus?

Accepted Answer

An icosahedral virus has a capsid compos

Question 19

A virion is

Accepted Answer

A) A protective protein shell surrounding nucleic acid 
B) The complete viral particle 
C) A phospholipid bilayer that contains glycoproteins 
D) A protein molecule that forms the capsid 
E) The sum of the nucleic acid and the capsid 
A) A protective protein shell surrounding nucleic acid 
B) The complete viral particle 
C) A phospholipid bilayer that contains glycoproteins 
D) A protein molecule that forms the capsid 
E) The sum of the nucleic acid and the capsid

Question 20

What processes can viruses use to spread within a host and describe how they help avoid and evade host defenses?

Accepted Answer

Viruses spread within a host by movement

Exam 12: The Structure and Infection Cycle of Viruses

A capsomere is

What is the composition of viruses?

Which of these processes is not used by viruses to spread within a host?

Regions on the host cell's plasma membrane rich in cholesterol and particular types of fatty acids to which some viruses attach are called

Why is the capsid an important part of the structure of the virus?

The _____ is the protein that is located between the capsid and the nucleocapsid of some enveloped viruses.

A nucleocapsid

Reverse transcriptase is an enzyme that

Enveloped viral structure Use the figure below to answer the following questions. -In the figure which letter (A-D)indicates the RNA or DNA?

Explain the difference between helical and icosahedral symmetry.Provide an example of each.

Enveloped viral structure Use the figure below to answer the following questions. -In the figure which letter (A-D)indicates the part that will eventually fuse with the host cell plasma membrane?

Enveloped viral structure Use the figure below to answer the following questions. -In the figure which letter (A-D)indicates neuraminidase or hemagglutinin?

Identify the sequence of events that occurs during the lytic cycle of an animal virus infection.Describe in basic terms what takes place at each step.

Retroviruses contain _____ which catalyzes the synthesis of DNA encoded by their RNA.

Enveloped viral structure Use the figure below to answer the following questions. -In the figure which letter (A-D)indicates the matrix protein?

A capsid is

Endosomes that assist in the uncoating of non-enveloped viruses function via

How does a simple icosahedral virus differ from a complex icosahedral virus?

A virion is

What processes can viruses use to spread within a host and describe how they help avoid and evade host defenses?

What is Microbiology and Why Does it Matter?

Fundamental Chemistry for Microbiology

Essentials of Metabolism

An Introduction to Cell Structure and Host-Pathogen Relationships

Requirements for Infection

Transmission of Infection, the Compromised Host, Epidemiology, and Diagnosing Infections

Principles of Disease

Emerging and Re-Emerging Infectious Disease

The Clinical Significance of Bacterial Anatomy

Bacterial Growth

Microbial Genetics and Infectious Disease

Viral Infection

Parasitic and Fungal Infections

The Innate Immune Response

The Adaptive Immune Response

Failures of the Immune Response

Control of Microbial Growth with Disinfectants and Antiseptics

Antibiotics and Antimicrobial Drugs

Antibiotic Resistance

Infections of the Respiratory System

Infections of the Digestive System

Infections of the Genitourinary System

Infections of the Central Nervous System

Infections of the Blood and Lymph

Infections of the Skin and Eyes

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