Question 1

Which statement is TRUE?

Accepted Answer

A)  Many viruses contain their own nucleic acid polymerases. 
B)  All viruses contain their own nucleic acid polymerases. 
C)  Viruses do not contain their own nucleic acid polymerases. 
D)  The origins of the nucleic acid polymerases used by viruses are eukaryotic. 
A)  Many viruses contain their own nucleic acid polymerases. 
B)  All viruses contain their own nucleic acid polymerases. 
C)  Viruses do not contain their own nucleic acid polymerases. 
D)  The origins of the nucleic acid polymerases used by viruses are eukaryotic.

Question 2

Virions infecting some bacteria possess the enzyme __________ that makes a small hole in the bacterial cell wall, allowing the viral nucleic acid to enter.

Accepted Answer

The answer of Virions infecting some bacteria possess the enzyme...

Question 3

RNA viruses encode host restriction systems designed to destroy host DNA.

Accepted Answer

A) True 
 B)False

Question 4

An RNA genome itself serves as mRNA in negative- stranded RNA viruses.

Accepted Answer

A) True 
 B)False

Question 5

The virus repressor protein provides immunity to infection by the same type of virus.

Accepted Answer

A) True 
 B)False

Question 6

The Baltimore Classification System groups seven viral classes according to_________ and_________.

Accepted Answer

their genome composi

Question 7

Retroviruses

Accepted Answer

A)  include the virus that causes AIDS. 
B)  transcribe DNA from RNA template. 
C)  may cause cancer. 
D)  do all of the above. 
A)  include the virus that causes AIDS. 
B)  transcribe DNA from RNA template. 
C)  may cause cancer. 
D)  do all of the above.

Question 8

Why might a virus undergo lysogeny rather than the lytic cycle?

Accepted Answer

A virus might undergo lysogeny rather th

Question 9

Because a prion is composed entirely of protein, explain how the prion replicates.

Accepted Answer

The sheer presence of a pathog

Question 10

Viruses can redirect host metabolic functions.

Accepted Answer

A) True 
 B)False

Question 11

Viruses infecting _________are typically the easiest to grow in the laboratory.

Accepted Answer

A)  plants 
B)  prokaryotes 
C)  fungi 
D)  animals 
A)  plants 
B)  prokaryotes 
C)  fungi 
D)  animals

Question 12

Present in both animals and plants, _________are incomplete and therefore require the presence of other active helper viruses.

Accepted Answer

defective,

Question 13

Cellular receptors may be composed of

Accepted Answer

A)  proteins. 
B)  lipids. 
C)  carbohydrates. 
D)  combinations of any or all of the above. 
A)  proteins. 
B)  lipids. 
C)  carbohydrates. 
D)  combinations of any or all of the above.

Question 14

Tailed bacterial viruses can be used as genetic engineering tools.

Accepted Answer

A) True 
 B)False

Question 15

Bacteriophages' genomes are typically composed of

Accepted Answer

A)  double- stranded RNA. 
B)  single- stranded DNA. 
C)  double- stranded DNA. 
D)  single- stranded RNA. 
A)  double- stranded RNA. 
B)  single- stranded DNA. 
C)  double- stranded DNA. 
D)  single- stranded RNA.

Question 16

All viral particles

Accepted Answer

A)  exhibit cell lysis under a particular condition. 
B)  are metabolically inert. 
C)  contain an envelope to prevent its degradation outside of a host. 
D)  are smaller than bacterial cells. 
A)  exhibit cell lysis under a particular condition. 
B)  are metabolically inert. 
C)  contain an envelope to prevent its degradation outside of a host. 
D)  are smaller than bacterial cells.

Question 17

Explain the relationship between the terms virus particle, virion, and virus genome.

Accepted Answer

A virus particle is a broad term used to

Question 18

What do viroids lack that viruses have, and how does this influence their ability to infect a host cell?

Accepted Answer

A viroids does not have a protein capsid

Question 19

A temperate virus does not exist as a virus particle inside the host cell.

Accepted Answer

A) True 
 B)False

Question 20

The Nobel Prize laureate David Baltimore is credited with the discovery of

Accepted Answer

A)  retroviruses and reverse transcriptase. 
B)  T- series viruses (such as T2, T4, etc.). 
C)  parvoviruses. 
D)  prions. 
A)  retroviruses and reverse transcriptase. 
B)  T- series viruses (such as T2, T4, etc.). 
C)  parvoviruses. 
D)  prions.

Exam 9: Viruses and Virology

Which statement is TRUE?

Virions infecting some bacteria possess the enzyme __________ that makes a small hole in the bacterial cell wall, allowing the viral nucleic acid to enter.

RNA viruses encode host restriction systems designed to destroy host DNA.

An RNA genome itself serves as mRNA in negative- stranded RNA viruses.

The virus repressor protein provides immunity to infection by the same type of virus.

The Baltimore Classification System groups seven viral classes according to_________ and_________.

Retroviruses

Why might a virus undergo lysogeny rather than the lytic cycle?

Because a prion is composed entirely of protein, explain how the prion replicates.

Viruses can redirect host metabolic functions.

Viruses infecting _________are typically the easiest to grow in the laboratory.

Present in both animals and plants, _________are incomplete and therefore require the presence of other active helper viruses.

Cellular receptors may be composed of

Tailed bacterial viruses can be used as genetic engineering tools.

Bacteriophages' genomes are typically composed of

All viral particles

Explain the relationship between the terms virus particle, virion, and virus genome.

What do viroids lack that viruses have, and how does this influence their ability to infect a host cell?

A temperate virus does not exist as a virus particle inside the host cell.

The Nobel Prize laureate David Baltimore is credited with the discovery of

Microorganisms and Microbiology

A Brief Journey to the Microbial World

Cell Structure and Function in Bacteria and Archaea

Nutrition, Culture, and Metabolism of Microorganisms

Microbial Growth

Molecular Biology of Bacteria

Archael and Eukaryotic Molecular Biology

Regulation of Gene Expression

Genetics of Bacteria and Arachaea

Genetic Engineering

Microbial Genomics

Phototrophy, Chemolithotrophy, and Major Biosyntheses

Catabolism of Organic Compounds

Commercial Products and Biotechnology

Microbial Evolution and Systematics

Bacteria: the Proteobacteria

Other Bacteria

Archaea

Eukaryotic Cell Biology and Eukaryotic Microorganisms

Viral Diversity

Methods in Microbial Ecology

Major Microbial Habitats and Diversity

Nutrient Cycles, Biodegradation, and Bioremediation

Microbial Symbioses

Microbial Growth Control

Microbial Interactions With Humans

Immunity and Host Defense

Immune Mechanisms

Molecular Immunology

Diagnostic Microbiology and Immunology

Epidemiology

Person-To-Person Microbial Diseases

Vectorborne and Soilborne Microbial Pathogens

Wastewater Treatment, Water Purification, and Waterborne Microbial Diseases

Food Preservation and Foodborne Microbial Diseases

Filters

The Baltimore Classification System groups seven viral classes according to_ and_.