Lysogenic Infection and Phage Induction Quiz
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Questions and Answers

Which type of virus is transmitted through sexual contact?

  • Respiratory
  • Zoonotic
  • Enteric
  • Sexually transmitted (correct)
  • Which type of virus is transmitted through the fecal-oral route?

  • Zoonotic
  • Sexually transmitted
  • Enteric (correct)
  • Respiratory
  • Which type of virus is transmitted through vector organisms like arthropods?

  • Sexually transmitted
  • Zoonotic (correct)
  • Respiratory
  • Enteric
  • What is the approximate diameter of the smallest viruses?

    <p>10 nanometer</p> Signup and view all the answers

    What is the general strategy for phage replication in a productive infection?

    <p>New viral particles are produced</p> Signup and view all the answers

    Which step of the animal virus replication cycle involves the binding of virus attachment proteins to receptors on the host cell surface?

    <p>Synthesis</p> Signup and view all the answers

    During viral replication, which event involves the expression of viral genes to produce viral structural and catalytic genes?

    <p>Synthesis</p> Signup and view all the answers

    Which replication strategy is used by RNA viruses?

    <p>RNA-directed RNA polymerase</p> Signup and view all the answers

    Which step of the animal virus replication cycle involves the separation of nucleic acid from the protein coat?

    <p>Entry and Uncoating</p> Signup and view all the answers

    Which type of virus can infect multiple species?

    <p>Reverse transcribing viruses</p> Signup and view all the answers

    Which type of infection occurs when a prophage is excised by a phage-encoded enzyme?

    <p>Lytic infection</p> Signup and view all the answers

    What can induce the excision of a prophage from a lysogen?

    <p>Ultraviolet light</p> Signup and view all the answers

    Which protease is activated by the SOS repair system during phage induction?

    <p>Protease RecA</p> Signup and view all the answers

    What is the consequence of lysogeny in terms of superinfection?

    <p>Immunity to superinfection</p> Signup and view all the answers

    Which type of phage infection causes infected cells to slowly die?

    <p>Filamentous phage infection</p> Signup and view all the answers

    Which of the following is true about viruses?

    <p>Viruses require live organisms as hosts</p> Signup and view all the answers

    What is the composition of a virion?

    <p>Nucleic acid surrounded by a capsid</p> Signup and view all the answers

    Which of the following is true about viral taxonomy?

    <p>Viral taxonomy includes eight principal ranks</p> Signup and view all the answers

    What is the main characteristic used to classify viruses?

    <p>Genome structure</p> Signup and view all the answers

    Which of the following routes can zoonotic viruses use to infect humans?

    <p>All of the above</p> Signup and view all the answers

    Which enzyme is required for the replication of RNA viruses?

    <p>RNA polymerase</p> Signup and view all the answers

    What is the role of the (+) strand in the replication of RNA viruses?

    <p>It is used as a template for synthesizing new (-) RNA strands</p> Signup and view all the answers

    Which type of viruses carry RNRP to synthesize the (+) strand?

    <p>dsRNA viruses</p> Signup and view all the answers

    What is the mechanism for variation in viruses that involves accumulation of mutations in genes coding for antibody-binding sites?

    <p>Antigenic drift</p> Signup and view all the answers

    Which surface protein enables viral release from the cell?

    <p>Neuraminidase</p> Signup and view all the answers

    Which scientist(s) determined that tobacco mosaic disease was caused by a 'filterable virus' too small to be seen with a light microscope?

    <p>D. M. Iwanowsky and Martinus Beijerinck</p> Signup and view all the answers

    What is the term used to describe microorganisms that were identified as infectious agents?

    <p>Filterable virus</p> Signup and view all the answers

    What was the year when tobacco mosaic disease was first identified?

    <p>1890s</p> Signup and view all the answers

    What did the scientists use to determine that the infectious agent causing tobacco mosaic disease was too small to be seen with a light microscope?

    <p>Filters for bacteria</p> Signup and view all the answers

    Who authored the textbook 'Nester's Microbiology A Human Perspective, Tenth Edition'?

    <p>Denise Anderson, Sarah Salm, Mira Beins</p> Signup and view all the answers

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