Question 1

The archaea virus SSV-1,which infects a host organism that lives at 80oC,has a positively supercoiled genome.What is the advantage of this?

Accepted Answer

A) It reduces local unwinding of the DNA. 
B) It makes it easier for DNA to be unwound during replication. 
C) It makes it easier for DNA to be unwound during transcription. 
D) It prevents tangling of the genomic DNA. 
E) It allows histone proteins to condense the genome. 
A) It reduces local unwinding of the DNA. 
B) It makes it easier for DNA to be unwound during replication. 
C) It makes it easier for DNA to be unwound during transcription. 
D) It prevents tangling of the genomic DNA. 
E) It allows histone proteins to condense the genome.

Question 2

Most archaea viruses resemble bacteriophages with an icosahedral head and a helical tail.

Accepted Answer

A) True 
 B)False

Question 3

Which of the following techniques can be used to induced an integrated copy of the archaea virus SSV-1 to begin expressing viral genes?

Accepted Answer

A) Exposure of cells to low pH 
B) Exposure of cells to high salt concentrations 
C) Superinfection with the same strain of virus 
D) Growth of cells at lower temperatures 
E) Exposure of cells to UV light 
A) Exposure of cells to low pH 
B) Exposure of cells to high salt concentrations 
C) Superinfection with the same strain of virus 
D) Growth of cells at lower temperatures 
E) Exposure of cells to UV light

Question 4

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.

Question 5

The filaments attached to one end of the Sulfolobus spindle-shaped virus 1 are thought to be involved in which of the following processes?

Accepted Answer

A) Degradation of the host cell wall 
B) Attachment to the surface of host cells 
C) Injection of the genome into the host cell 
D) Movement of the virus particle through the environment 
E) Maintaining the structure of the virion 
A) Degradation of the host cell wall 
B) Attachment to the surface of host cells 
C) Injection of the genome into the host cell 
D) Movement of the virus particle through the environment 
E) Maintaining the structure of the virion

Exam 9: Viruses of Archaea

The archaea virus SSV-1,which infects a host organism that lives at 80oC,has a positively supercoiled genome.What is the advantage of this?

Most archaea viruses resemble bacteriophages with an icosahedral head and a helical tail.

Which of the following techniques can be used to induced an integrated copy of the archaea virus SSV-1 to begin expressing viral genes?

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?

The filaments attached to one end of the Sulfolobus spindle-shaped virus 1 are thought to be involved in which of the following processes?

Introduction to Virology 2

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

Paramyxoviruses and Rhabdoviruses

Filovirouses

Bunyaviruses

Influenza Viruses

Reoviruses

Parvoviruses

Polyomaviruses

Papillomaviruses

Adenoviruses

Herpesviruses

Baculoviruses

Poxviruses

Viruses of Algae and Mimivirus

Retroviruses

Human Immunodeficiency Virus

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

The archaea virus SSV-1,which infects a host organism that lives at 80^oC,has a positively supercoiled genome.What is the advantage of this?