Chapter 6 Questions Flashcards
The component(s) of a virus that is/are extended from the envelope for attachment is/are the?
A. Capsomeres
B. spikes
C. Nucleic acid
D. Viral whiskers
B. Spikes
Which of the following does a virus lack? Select all that apply
A. Ribosomes
B. Metabolic processes
C. Nucleic acid
D. Glycoprotein
Ribosomes and Metabolic processes
The envelope of a virus is derived from the host’s what?
A. Nucleic acids
B. Membrane structures
C. Cytoplasm
D. Genome
Membrane structures
In naming viruses, the family name ends with ___________ and genus name ends with ___________.
A. -Virus; -viridae
B. -viridae; virus
C. -Virion; virus
D. -Virus, virion
-viridae, -virus
What is another name for a noneveloped virus?
A. enveloped virus
B. Provirus
C. Naked virus
D. Latent virus
Naked virus
Which of the following leads to the destruction of the host cells?
A. Lysogenic cycle
B. Lytic cycle
C. Prophage
D. Temperate phage
Lytic cycle
A virus obtains its envelope during which of the following phases?
A. attachment
B. Penetration
C. Assembly
D. Release
Release
Which of the following components is brought into a cell by HIV?
A. a DNA-dependent DNA polymerase
B. RNA polymerase
C. Ribosome
D. Reverse transcriptase
Reverse trancriptase
A positive- strand RNA virus:
A. Must be converted to a mRNA before it can be translated
B. Can be used directly to translate viral proteins
C. Will be degraded by host enzymes
D. Is not recognized by host ribosomes
Can be used directly to translate viral proteins
What is the name for the transfer of genetic information from one bacterium to another bacterium by a phage?
A. Transduction
B. Penetration
C. Excision
D. Translation
Transduction
Which of the following cannot be used to culture viruses?
A. Tissue culture
B. Liquid medium only
C. Embryo
D. animal host
Liquid medium only
Which of the following test can be used to detect the presence of a specific virus?
A. EIA
B. RT-PCR
C. PCR
D. All of the above
All of the above
Which of the following is NOT a cytopathic effect?
A. Transformation
B. Cell fusion
C. Mononucleated cell
D. Inclusion bodies
Mononucleated cell
Which of these infectious agents do not have Nucleic acid?
A. Viroids
B. Viruses
C. Bacteria
D. Prions
Prions
Which of the following is true of prions?
A. They can be inactive by boiling at 100 degrees Celsius
B. They contain a capsid
C. They are a rogue for of protein, PrP.
D. They can be reliability inactivated by an autoclave
They are a rogue form of protein, PrP
Scientist have identified viruses that are able to infect fungal cells.
True or false
True
The virus that infects a bacterium is called a/an __________________.
Bacteriophage
A/an _______________ virus possesses characteristics of both a polyhedral and helical virus.
Complex
A virus containing only Nucleic acid and a capsid is called a/an ____________________ virus or ________________ virus.
Naked, noneveloped
The ___________ __________________ on the bacteriophage allow for binding to the bacterial cell.
Tail fibers
An enzyme from HIV that can make a copy of DNA from RNA is called __________________ ________________.
Reverse transcriptase
For lytic viruses, _______________ is a phase during a viral growth curve when the virus is not detected.
Eclipse
Viruses can be diagnosed and observed using a(n) _____________ microscope.
Electron
Cell abnormalities resulting from a viral infection are called ___________ ___________.
Cytopathic effects
Both viroids and virusoids have a(n) __________ genome, but virus require a(n) _________ to reproduce.
RNA, helper virus
