Trivia: Microbiology Quiz On DNA And Virus

45 Questions | Total Attempts: 164

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Microbiology Quizzes & Trivia

Microbiology is a very important discipline that someone who wants to thrive in the health sector is expected to have a good understanding of. This quiz is designed to ask questions related to the course of UTHSC's Medical Technology Microbiology III. Give it a try and get to find out just how much knowledge you have so far. All the best!


Questions and Answers
  • 1. 
    Viruses that infect bacteria are referred to as
    • A. 

      Viralcidens

    • B. 

      Bacteriocidins

    • C. 

      Bacterialogens

    • D. 

      Bacteriophages

  • 2. 
    A virion is a(n)
    • A. 

      Pathogenic virus

    • B. 

      Suviral particle

    • C. 

      Individual virus particle

    • D. 

      Enveloped virus particle

  • 3. 
    A virion is composed of
    • A. 

      Protein,and both RNA and DNA

    • B. 

      Protein, and either RNA or DNA

    • C. 

      Protein

    • D. 

      DNA

  • 4. 
    The protein coat of a virus
    • A. 

      Is called a capsomere

    • B. 

      Is called a capsid

    • C. 

      Protects the nucleic acid

    • D. 

      Is involved in recognition of host cell receptors

    • E. 

      Is called a capsid, protects the nucleic acid AND is involved in recognition of host cell receptors

  • 5. 
    Which does not refer to the shape of a virus?
    • A. 

      Icosahedral (isometric)

    • B. 

      Helical

    • C. 

      Complex

    • D. 

      Bacillus

  • 6. 
    The shape of the virus is determined by its
    • A. 

      Nucleic acid

    • B. 

      Capsid

    • C. 

      Envelope

    • D. 

      Tail

  • 7. 
    The viral envelope closely resembles the
    • A. 

      Prokaryotic cell wall

    • B. 

      Capsomere

    • C. 

      Eukaryotic cell membrane

    • D. 

      Cytoplasm

  • 8. 
    A limiting factor for viral infection is
    • A. 

      Internal metabolic temperature of the host cell

    • B. 

      Nutrition of the host cell

    • C. 

      Stage of cell cycle of the host cell

    • D. 

      Presence of specific receptor molecules on the host cell

  • 9. 
    If the infecting phage lacks some critical pieces of DNA necessary for replication it is called
    • A. 

      Incomplete

    • B. 

      Mutated

    • C. 

      Defective

    • D. 

      Vegetative

  • 10. 
    Specialized transduction
    • A. 

      Involves the random transmission of any gene

    • B. 

      Involves the transfer of a few specific genes

    • C. 

      Utilizes a defective virus

    • D. 

      Only involves genes near the viral DNA integration site

    • E. 

      Involves the transfer of a few specific genes, utilizes a defective virus AND only involves genes near the viral DNA integration site

  • 11. 
    The replicative form of nucleic acid in filamentous phages is
    • A. 

      DsDNA

    • B. 

      DsRNA

    • C. 

      Positive ssRNA

    • D. 

      Negative ssDNA

  • 12. 
    Filamentous phage
    • A. 

      Only infect E.coli that have pili

    • B. 

      Only infect E.coli lacking pili

    • C. 

      Infect E.coli regardless of the presence of pili

    • D. 

      Do not infect E. coli

  • 13. 
    Once inside the host cell, phage DNA
    • A. 

      Is replicated

    • B. 

      Is transcribed

    • C. 

      May get degraded by bacterial nucleases

    • D. 

      All of the choice are correct

  • 14. 
    Most phages that contain single-stranded DNA
    • A. 

      Are extruded

    • B. 

      Contain a positive-sese DNA strand

    • C. 

      Have their DNA transformed to double-stranded DNA before replication and transcription occur

    • D. 

      All of the choice are correct

  • 15. 
    Phages that can either replicate and cause cell lysis or can integrate their DNA into the host DNA are called
    • A. 

      Lysogenic phages

    • B. 

      Lytic phages

    • C. 

      Virulent phages

    • D. 

      Segmented phages

  • 16. 
    One of the most intensively studied virulent phages which infects E.coli is
    • A. 

      T9

    • B. 

      T4

    • C. 

      Beta

    • D. 

      Gamma

  • 17. 
    During attachment of phage to E.coli, the phage
    • A. 

      Actively seek out bacteria

    • B. 

      Randomly bump into bacteria

    • C. 

      Attach to proteins or carbohydrates on the bacterial surface

    • D. 

      Attach to the bacterial RNA

    • E. 

      Randomly bump into the bacteria AND attach to proteins or carbohydrates on the bacterial surface

  • 18. 
    What part of the E. coli T4 phage attaches to the host cell receptors?
    • A. 

      Capsid fragments around the nucleic acid

    • B. 

      Protein fibers at the end of the phage tail

    • C. 

      Pili of the envelope

    • D. 

      Spikes of the envelope

  • 19. 
    During penetration of E. coli by the T4 phage
    • A. 

      Lysozyme is used to allow entry of the phage capsid

    • B. 

      The tail acts as a "hypodermic needle",injecting the phage DNA into the cell

    • C. 

      The protein fibers digest a hole in the cell wall

    • D. 

      The bacterial receptor molecules open a hole through the cell wall

  • 20. 
    Phage-encoded proteins are
    • A. 

      Coded for by host DNA

    • B. 

      Coded for by phage DNA

    • C. 

      Proteins normally present in the uninfected cell

    • D. 

      Early proteins

    • E. 

      Coded for by phage DNA AND early proteins

  • 21. 
    Phage-encoded enzymes are
    • A. 

      All produced simultaneously

    • B. 

      Produced in a sequential manner

    • C. 

      Strictly host enzymes

    • D. 

      Used to customize the cell for viral production

    • E. 

      Produced in a sequential manner AND used to customize the cell for viral production

  • 22. 
    The protein projection on the surface of a virus that are involved in attachment to the host cell are called
    • A. 

      Suckers

    • B. 

      Pili

    • C. 

      Cilia

    • D. 

      Spikes

    • E. 

      Hooks

  • 23. 
    Outside of living cells, viruses are
    • A. 

      Scavenging glucose

    • B. 

      Slowly stockpiling ATP from the mitochondria

    • C. 

      Using cilia to move to the next host

    • D. 

      Metabotically inert

  • 24. 
    Viruses
    • A. 

      Probably keep the number of bacteria in check

    • B. 

      Habe no effect on the number of bacteria

    • C. 

      Increase the number of bacteria

    • D. 

      Are active in passing DNA from one bacterium to another

    • E. 

      Probably keep the numbers of bacteria in check AND are active in passing DNA from one bacterium to another

  • 25. 
    What part of the attached bacteriophage enters through the host cell wall?
    • A. 

      The entire virus

    • B. 

      Only the enzymes necessary for replication

    • C. 

      The nucleic acid

    • D. 

      The nucleic acid and capsid

    • E. 

      The capsid only