Question 1

Viruses lack introns in their genomes.

Accepted Answer

A) True 
 B)False

Question 2

The terms gag, pol, and env are genes present in all_______ .

Accepted Answer

The answer of The terms gag, pol, and env are...

Question 3

Transcription, replication, and encapsidation of vaccinia progeny particles occur in structures known as_______ .

Accepted Answer

The answer of Transcription, replication, and encapsidation of vaccinia progeny...

Question 4

Viruses that are enveloped contain________ membranes.

Accepted Answer

The answer of Viruses that are enveloped contain________ membranes....

Question 5

Enzymes are contained in the virion of retroviruses because the genome is not used directly as mRNA.

Accepted Answer

A) True 
 B)False

Question 6

Gene therapy viruses are usually constructed from which type of virus?

Accepted Answer

A)  adenoviruses 
B)  poxviruses 
C)  polyomaviruses 
D)  cytomegaloviruses 
A)  adenoviruses 
B)  poxviruses 
C)  polyomaviruses 
D)  cytomegaloviruses

Question 7

In bacteriophage 0X174, viral mRNA is synthesized from

Accepted Answer

A)  RF DNA. 
B)  mRNA replicase. 
C)  RF RNA. 
D)  the host's genome. 
A)  RF DNA. 
B)  mRNA replicase. 
C)  RF RNA. 
D)  the host's genome.

Question 8

T7 has an icosahedral head

Accepted Answer

A)  and no tail. 
B)  and a long tail. 
C)  with an indeterminate tail length. 
D)  and a very short tail. 
A)  and no tail. 
B)  and a long tail. 
C)  with an indeterminate tail length. 
D)  and a very short tail.

Question 9

The viral DNA of simian virus 40 (SV40) codes for two DNA polymerases but must use the host for its additional polymerases.

Accepted Answer

A) True 
 B)False

Question 10

What is the function of RNA replicase (RNA- dependent RNA polymerase)?

Accepted Answer

A)  replicate RNA from RNA 
B)  replicate RNA from either DNA or RNA 
C)  cleave proteins and replicate RNA from RNA 
D)  cleave proteins 
A)  replicate RNA from RNA 
B)  replicate RNA from either DNA or RNA 
C)  cleave proteins and replicate RNA from RNA 
D)  cleave proteins

Question 11

Explain the phenomenon of antigenic shift using the influenza virus as an example.

Accepted Answer

Antigenic shift is a phenomenon where ma

Question 12

Most known plant viruses have_______ - strand RNA genomes, because small genomes _______.

Accepted Answer

A)  negative / facilitate cell- to- cell transfer 
B)  positive / facilitate cell- to- cell transfer 
C)  positive / interact more readily with host DNA 
D)  negative / interact more readily with host DNA 
A)  negative / facilitate cell- to- cell transfer 
B)  positive / facilitate cell- to- cell transfer 
C)  positive / interact more readily with host DNA 
D)  negative / interact more readily with host DNA

Question 13

The two kinds of coat proteins formed in the assembly of the enveloped rhabdovirus virion are ________ proteins and ________ proteins.

Accepted Answer

nucleocaps

Question 14

Hepadnaviruses contain DNA genomes that are partially double- stranded and partially single- stranded.

Accepted Answer

A) True 
 B)False

Question 15

The 5,386 bp genome of 0X174 was the first DNA molecule to be completely sequenced.

Accepted Answer

A) True 
 B)False

Question 16

Some viruses have been confirmed to cause cancer in humans.

Accepted Answer

A) True 
 B)False

Question 17

A concatemer is a

Accepted Answer

A)  combination of two or more repeated nucleotide sequences covalently linked together. 
B)  polymeric protein. 
C)  linker molecule that allows several phages to infect one host. 
D)  complex of RNA- specific polymerases found only in bacteriophages. 
A)  combination of two or more repeated nucleotide sequences covalently linked together. 
B)  polymeric protein. 
C)  linker molecule that allows several phages to infect one host. 
D)  complex of RNA- specific polymerases found only in bacteriophages.

Question 18

The lipid envelope surrounding rhabdoviruses and influenza viruses is acquired from the_______of the host cell.

Accepted Answer

cytoplasmi

Question 19

In T7, the proteins that inhibit the host restriction system are synthesized

Accepted Answer

A)  after the T7 genome is completely within the host cytoplasm. 
B)  in response to the T7 genome binding to the host chromosome. 
C)  before the entire T7 genome enters the cell. 
D)  while the T7 genome is entering the cell but before it enters the nucleus. 
A)  after the T7 genome is completely within the host cytoplasm. 
B)  in response to the T7 genome binding to the host chromosome. 
C)  before the entire T7 genome enters the cell. 
D)  while the T7 genome is entering the cell but before it enters the nucleus.

Question 20

The filamentous DNA phages are unusual, because they

Accepted Answer

A)  are released from the host without the host being lysed. 
B)  replicate without a host. 
C)  have linear genomes. 
D)  do all of the above. 
A)  are released from the host without the host being lysed. 
B)  replicate without a host. 
C)  have linear genomes. 
D)  do all of the above.

Exam 21: Viral Diversity

Viruses lack introns in their genomes.

The terms gag, pol, and env are genes present in all_______ .

Transcription, replication, and encapsidation of vaccinia progeny particles occur in structures known as_______ .

Viruses that are enveloped contain________ membranes.

Enzymes are contained in the virion of retroviruses because the genome is not used directly as mRNA.

Gene therapy viruses are usually constructed from which type of virus?

In bacteriophage 0X174, viral mRNA is synthesized from

T7 has an icosahedral head

The viral DNA of simian virus 40 (SV40) codes for two DNA polymerases but must use the host for its additional polymerases.

What is the function of RNA replicase (RNA- dependent RNA polymerase)?

Explain the phenomenon of antigenic shift using the influenza virus as an example.

Most known plant viruses have_______ - strand RNA genomes, because small genomes _______.

The two kinds of coat proteins formed in the assembly of the enveloped rhabdovirus virion are ________ proteins and ________ proteins.

Hepadnaviruses contain DNA genomes that are partially double- stranded and partially single- stranded.

The 5,386 bp genome of 0X174 was the first DNA molecule to be completely sequenced.

Some viruses have been confirmed to cause cancer in humans.

A concatemer is a

The lipid envelope surrounding rhabdoviruses and influenza viruses is acquired from the_______of the host cell.

In T7, the proteins that inhibit the host restriction system are synthesized

The filamentous DNA phages are unusual, because they

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

Viruses and Virology

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

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

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Most known plant viruses have_ - strand RNA genomes, because small genomes _.

The two kinds of coat proteins formed in the assembly of the enveloped rhabdovirus virion are proteins and proteins.