Question 1

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 2

Viral spikes are inserted into the host cell membrane before budding or exocytosis occurs.

Accepted Answer

A) True 
 B)False

Question 3

Satellite viruses are

Accepted Answer

A) also called viroids. 
B) dependent on other viruses for replication. 
C) the cause of spongiform encephalopathies. 
D) significant pathogens of plants. 
E) All of these choices are correct. 
A) also called viroids. 
B) dependent on other viruses for replication. 
C) the cause of spongiform encephalopathies. 
D) significant pathogens of plants. 
E) All of these choices are correct.

Question 4

In general, most DNA viruses multiply in the host cell's _____, while most RNA viruses multiply in the host cell's _____.

Accepted Answer

A) nucleus; cytoplasm 
B) cytoplasm; cell membrane 
C) cell membrane; cytoplasm 
D) cytoplasm; nucleus 
E) nucleus; endoplasmic reticulum 
A) nucleus; cytoplasm 
B) cytoplasm; cell membrane 
C) cell membrane; cytoplasm 
D) cytoplasm; nucleus 
E) nucleus; endoplasmic reticulum

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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 7

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 8

Viral capsids are made from subunits called

Accepted Answer

A) envelopes. 
B) spikes. 
C) capsomers. 
D) prophages. 
E) peplomers. 
A) envelopes. 
B) spikes. 
C) capsomers. 
D) prophages. 
E) peplomers.

Question 9

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 10

The Adeno-Associated Virus (AAV) and the Delta Agent are prions.

Accepted Answer

A) True 
 B)False

Question 11

Which of these structures are used by bacteriophages to attach to host cell receptors?

Accepted Answer

A) sheath 
B) tail fibers 
C) nucleic acid 
D) capsid head 
A) sheath 
B) tail fibers 
C) nucleic acid 
D) capsid head

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

Viruses with _____ sense RNA contain the correct message for translation, while viruses with _____ sense RNA must first be converted into a correct message.

Accepted Answer

The answer of Viruses with _____ sense RNA contain the...

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

Viruses are ultramicroscopic because they range in size from 2 mm to 450 mm.

Accepted Answer

A) True 
 B)False

Question 16

Discuss theories regarding the origins of viruses and make a case for whether viruses originated before cellular life-forms or after cellular life-forms.

Accepted Answer

The origins of viruses have been a topic

Question 17

Select the FALSE statement about viruses.

Accepted Answer

A) Cellular life-forms most likely preceded the origin of viruses since viruses need host cells in which to develop and reproduce. 
B) Viruses are the most numerous microbes on Earth. 
C) Viruses have impacted the evolution of all other cellular life-forms including bacteria, achaeans, and eukaryotes. 
D) When viruses are treated in a way that prevents them from entering host cells and reproducing, they are said to be dead. 
A) Cellular life-forms most likely preceded the origin of viruses since viruses need host cells in which to develop and reproduce. 
B) Viruses are the most numerous microbes on Earth. 
C) Viruses have impacted the evolution of all other cellular life-forms including bacteria, achaeans, and eukaryotes. 
D) When viruses are treated in a way that prevents them from entering host cells and reproducing, they are said to be dead.

Question 18

When used in a description of viruses, the term replication includes

Accepted Answer

A) the production of multiple copies of a virus by a host cell. 
B) the copying of the viral DNA in a DNA virus. 
C) the copying of the genomic RNA in an RNA virus. 
D) All of these choices are correct. 
A) the production of multiple copies of a virus by a host cell. 
B) the copying of the viral DNA in a DNA virus. 
C) the copying of the genomic RNA in an RNA virus. 
D) All of these choices are correct.

Question 19

Which of the following is not associated with every virus?

Accepted Answer

A) envelope 
B) capsomers 
C) capsid 
D) nucleic acid 
E) Genome 
A) envelope 
B) capsomers 
C) capsid 
D) nucleic acid 
E) Genome

Question 20

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

Exam 6: An Introduction to Viruses

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

Viral spikes are inserted into the host cell membrane before budding or exocytosis occurs.

Satellite viruses are

In general, most DNA viruses multiply in the host cell's _____, while most RNA viruses multiply in the host cell's _____.

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

Viruses belong to which of the following Kingdoms?

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

Viral capsids are made from subunits called

Creutzfeldt-Jakob disease is

The Adeno-Associated Virus (AAV) and the Delta Agent are prions.

Which of these structures are used by bacteriophages to attach to host cell receptors?

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

Viruses with _____ sense RNA contain the correct message for translation, while viruses with _____ sense RNA must first be converted into a correct message.

All of the following pertain to virus envelopes except they

Viruses are ultramicroscopic because they range in size from 2 mm to 450 mm.

Discuss theories regarding the origins of viruses and make a case for whether viruses originated before cellular life-forms or after cellular life-forms.

Select the FALSE statement about viruses.

When used in a description of viruses, the term replication includes

Which of the following is not associated with every virus?

Which of the following will not support viral cultivation?

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

Filters

In general, most DNA viruses multiply in the host cell's _, while most RNA viruses multiply in the host cell's _.

Viruses with _ sense RNA contain the correct message for translation, while viruses with _ sense RNA must first be converted into a correct message.