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Question pack on viruses, viroids, virusoids and prions.
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The component(s) of a virus that is/are extended from the envelope for attachment is/are the:
Which of the following does a virus lack? Select all that apply.
The envelope of a virus is derived from the host’s
In naming viruses, the family name ends with ______________ and genus name ends with ______________.
What is another name for a nonenveloped virus?
Scientists have identified viruses that are able to infect fungal cells.
A virus that infects a bacterium is called a/an ______________.
A/an ______________ virus possesses characteristics of both a polyhedral and helical virus.
A virus containing only nucleic acid and a capsid is called a/an ______________ virus or______________virus.
The ______________ ______________ on the bacteriophage allow for binding to the bacterial cell.
Which of the following leads to the destruction of the host cells?
A virus obtains its envelope during which of the following phases?
Which of the following components is brought into a cell by HIV?
a DNA-dependent DNA polymerase
A positive-strand RNA virus:
must first be converted to a mRNA before it can be translated.
can be used directly to translate viral proteins.
will be degraded by host enzymes.
is not recognized by host ribosomes.
What is the name for the transfer of genetic information from one bacterium to another bacterium by a phage?
An enzyme from HIV that can make a copy of DNA from RNA is called ______________.
For lytic viruses, ______________ is a phase during a viral growth curve when the virus is not detected.
Which of the followings cannot be used to culture viruses?
liquid medium only
Which of the following tests can be used to detect the presence of a specific virus?
all of the above
Which of the following is NOT a cytopathic effect?
Viruses can be diagnosed and observed using a(n) ______________ microscope.
Cell abnormalities resulting from a viral infection are called ______________ ______________.
Which of these infectious agents do not have nucleic acid?
Which of the following is true of prions?
They can be inactivated by boiling at 100 °C
They contain a capsid.
They are a rogue form of protein, PrP.
They can be reliably inactivated by an autoclave.
Both viroids and virusoids have a(n) ______________ genome, but virusoids require a(n) ______________ to reproduce.