Question 1

Which of the following can be found at the ends of the genome of a virus that infects archaeal cells?

Accepted Answer

A)  Covalently bound protein 
B)  Inverted terminal repeats 
C)  Telomeric-like repeat sequences 
D)  Covalently closed ends 
E)  All of the above can be found. 
A)  Covalently bound protein 
B)  Inverted terminal repeats 
C)  Telomeric-like repeat sequences 
D)  Covalently closed ends 
E)  All of the above can be found.

Question 2

Some of the viruses that infect archaeal cells have linear dsDNA genomes with covalently closed ends.What is a major advantage of this feature?

Accepted Answer

A)  It makes the genome more stable under low pH conditions. 
B)  It allows the genome to be more easily packaged into the virion 
C)  It allows the genome to be more easily integrated into the host cell genome. 
D)  It allows the genome to use a self-priming mechanism for DNA replication. 
E)  All of the above are correct. 
A)  It makes the genome more stable under low pH conditions. 
B)  It allows the genome to be more easily packaged into the virion 
C)  It allows the genome to be more easily integrated into the host cell genome. 
D)  It allows the genome to use a self-priming mechanism for DNA replication. 
E)  All of the above are correct.

Question 3

Rudiviruses, a family of archaea viruses, are different from most other archaea viruses in that they lyse the host cell to release mature virions.

Accepted Answer

A) True 
 B)False

Question 4

Viruses that infect archaeal cells have been isolated from all of the following environments EXCEPT:

Accepted Answer

A)  Hot springs with temperatures over 80ᵒC 
B)  Environments with a pH of 0 
C)  Solfataric fields that emit sulfur gases 
D)  The surface of the moon 
E)  Environments with salt concentrations over 1.5M 
A)  Hot springs with temperatures over 80ᵒC 
B)  Environments with a pH of 0 
C)  Solfataric fields that emit sulfur gases 
D)  The surface of the moon 
E)  Environments with salt concentrations over 1.5M

Question 5

What is the function of the large pyramidal structures that are produced during infection with the archaeal virus SIRV-2, which is a member of the Rudivirus family?

Accepted Answer

A)  They are sites of viral gene expression. 
B)  They lyse the host cell and release virions from the cell. 
C)  They are part of the virion assembly complex. 
D)  They are structures involved in viral DNA replication 
E)  They are involved in inhibiting host cell functions. 
A)  They are sites of viral gene expression. 
B)  They lyse the host cell and release virions from the cell. 
C)  They are part of the virion assembly complex. 
D)  They are structures involved in viral DNA replication 
E)  They are involved in inhibiting host cell functions.

Exam 9: Viruses of Archaea

Which of the following can be found at the ends of the genome of a virus that infects archaeal cells?

Some of the viruses that infect archaeal cells have linear dsDNA genomes with covalently closed ends.What is a major advantage of this feature?

Rudiviruses, a family of archaea viruses, are different from most other archaea viruses in that they lyse the host cell to release mature virions.

Viruses that infect archaeal cells have been isolated from all of the following environments EXCEPT:

What is the function of the large pyramidal structures that are produced during infection with the archaeal virus SIRV-2, which is a member of the Rudivirus family?

Introduction to Virology

Virus Structure and Assembly

Virus Classification: The World of Viruses

Virus Entry

Single-Stranded RNA Bacteriophages

Microviruses

Bacteriophage

Bacteriophage Lambda

Cucumber Mosaic Virus

Picornaviruses

Flaviviruses

Togaviruses

Coronaviruses

Paramyxo-Viruses and Rhabdoviruses

Filovirouses

Bunyaviruses

Influenza Viruses

Reoviruses

Parvoviruses

Polyomaviruses

Papillomaviruses

Adenoviruses

Herpesviruses

Baculoviruses

Poxviruses

Viruses of Algae and Mimivirus

Retroviruses

Human Immunodeficiency

Hepadnaviruses

Viroids and Hepatitis Delta Virus

Prions

Intrinsic Cellular Defenses Against Virus Infection

Innate and Adaptive Immune Responses to Virus Infection

Antiviral Vaccines

Antiviral Chemotherapy

Eukaryotic Virus Vectors

Filters