Comparing Ribosome Size and Cell Characteristics in Prokaryotes and Fungi
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Questions and Answers

What is the function of a bacterial capsule?

  • Mediates adherence to surfaces
  • Protects against phagocytosis (correct)
  • Contains channels for transport
  • Facilitates motility
  • What is the composition of a typical bacterial cell wall?

  • Nucleic acids and carbohydrates
  • Polysaccharides N-acetylmuramic acid (NAM) and N-acetylglucosamine (NAG) (correct)
  • Proteins and lipids
  • Only lipids
  • Which structure in bacteria is responsible for adhesion to surfaces and transfer of genetic material during conjugation?

  • Spore
  • Cell envelope
  • Flagellum
  • Pilus/fimbria (correct)
  • What is the function of lipoteichoic acid in bacterial cytoplasmic membrane?

    <p>Induces TNF-α &amp; IL-1</p> Signup and view all the answers

    What characteristic distinguishes viruses from other microorganisms?

    <p>Composition of cells</p> Signup and view all the answers

    Which bacterial structure is essential for motility?

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

    Which type of cell wall component is characteristic of fungi?

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

    What is the primary function of ergosterol in fungal cells?

    <p>Cell membrane structure</p> Signup and view all the answers

    Among the listed pathogens, which one is an example of a protozoan parasite?

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

    What is the primary route of infection for helminths like tapeworms?

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

    Which statement accurately describes viruses?

    <p>Require host cell machinery to replicate</p> Signup and view all the answers

    Which bacterial protein prevents opsonization and phagocytosis by binding to the Fc region of IgG?

    <p>Protein A</p> Signup and view all the answers

    What is the fate of host cells following viral infection?

    <p>Rapid lysis &amp; release of viral particles</p> Signup and view all the answers

    Which type of infections occur more frequently and severely in immunocompromised patients?

    <p>Opportunistic infections</p> Signup and view all the answers

    Which enzyme cleaves IgA, allowing bacteria to adhere to and colonize mucous membranes?

    <p>IgA protease</p> Signup and view all the answers

    Which bacterial protein expressed by group A streptococci may lead to tissue damage through molecular mimicry with human cardiac myosin?

    <p>M protein</p> Signup and view all the answers

    What type of toxins can bacteria produce that contribute to the classification of infections as pyogenic?

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

    At what temperature are most bacteria destroyed rapidly, except for specific toxins like staphylococcal enterotoxin and E coli heat-stable toxin?

    <p>60°C for 1 hour</p> Signup and view all the answers

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