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Multiple Choice

MicrobiologyMultiple Choice

Multiple Choice


The component(s) of a virus that is/are extended from the envelope for attachment is/are the:

  1. capsomeres
  2. spikes
  3. nucleic acid
  4. viral whiskers

Which of the following does a virus lack? Select all that apply.

  1. ribosomes
  2. metabolic processes
  3. nucleic acid
  4. glycoprotein

The envelope of a virus is derived from the host’s

  1. nucleic acids
  2. membrane structures
  3. cytoplasm
  4. genome

In naming viruses, the family name ends with ________ and genus name ends with _________.

  1. −virus; −viridae
  2. −viridae; −virus
  3. −virion; virus
  4. −virus; virion

What is another name for a nonenveloped virus?

  1. enveloped virus
  2. provirus
  3. naked virus
  4. latent virus

Which of the following leads to the destruction of the host cells?

  1. lysogenic cycle
  2. lytic cycle
  3. prophage
  4. temperate phage

A virus obtains its envelope during which of the following phases?

  1. attachment
  2. penetration
  3. assembly
  4. release

Which of the following components is brought into a cell by HIV?

  1. a DNA-dependent DNA polymerase
  2. RNA polymerase
  3. ribosome
  4. reverse transcriptase

A positive-strand RNA virus:

  1. must first be converted to a mRNA before it can be translated.
  2. can be used directly to translate viral proteins.
  3. will be degraded by host enzymes.
  4. 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?

  1. transduction
  2. penetration
  3. excision
  4. translation

Which of the followings cannot be used to culture viruses?

  1. tissue culture
  2. liquid medium only
  3. embryo
  4. animal host

Which of the following tests can be used to detect the presence of a specific virus?

  1. EIA
  2. RT-PCR
  3. PCR
  4. all of the above

Which of the following is NOT a cytopathic effect?

  1. transformation
  2. cell fusion
  3. mononucleated cell
  4. inclusion bodies

Which of these infectious agents do not have nucleic acid?

  1. viroids
  2. viruses
  3. bacteria
  4. prions

Which of the following is true of prions?

  1. They can be inactivated by boiling at 100 °C.
  2. They contain a capsid.
  3. They are a rogue form of protein, PrP.
  4. They can be reliably inactivated by an autoclave.
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