BIOMED 1 - Moodle quiz
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Questions and Answers

Bacteria are prokaryotes. What does this mean?

  • Have a nucleus
  • Don't have a nucleus (correct)
  • They are small
  • They can move
  • Bacteria can move. What is the name of the structure that moves them?

  • Flagellum (correct)
  • Whip
  • Appendage
  • Tail
  • Examples of oral conditions caused by bacteria are …

  • Periodontal disease (correct)
  • Thrush
  • Coldsores
  • Caries (correct)
  • The cell wall of gram negative bacteria produce endotoxins during cell lysis

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

    The cell wall of gram negative bacteria produce endotoxins whilst the bacteria is replicating

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

    What would you NOT expect to find in cell structure?

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

    Which of the following statements about the Golgi apparatus is INCORRECT?

    <p>Plays an important part in cell division</p> Signup and view all the answers

    Which of the following statements about the nuclear envelope is INCORRECT?

    <p>The outer layer is covered with cilia</p> Signup and view all the answers

    Which of the following statements about the nucleus is INCORRECT?

    <p>Is the smallest feature in a cell</p> Signup and view all the answers

    Which of the following statements is false?

    <p>The plasma membrane comprises a single layer</p> Signup and view all the answers

    Which of the following statements is INCORRECT?

    <p>Each daughter nuclei contains 34 chromosomes</p> Signup and view all the answers

    Which organelle contains enzymes to digest foreign material?

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

    Which organelle is known as the power house of the cell?

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

    Fungal microflora is present throughout the human body

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

    The diversity of fungal presence varies from person to person but will remain the same for all sites on an individual

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

    The structural forms of fungi are

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

    The term commensal microflora refers to the pathogenic nature of micro-organisms to the host

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

    The term dimorphic relates to the ability of fungi to

    <p>Switch between being a yeast and a mould</p> Signup and view all the answers

    Which of the following statements on fungi are true?

    <p>Fungi are oral commensals of approximately 50% of humans</p> Signup and view all the answers

    Yeast is unlike bacteria in being

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

    An example of a virus exhibiting viral latency is

    <p>Herpes zoster</p> Signup and view all the answers

    Genetic material of a virus can be

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

    Penetration occurs by the following

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

    Select the correct order of replication of viruses

    <p>Adsorption, Penetration, Uncoating, Transcription, Synthesis of viral components, Assembly, Release</p> Signup and view all the answers

    Viruses are predominantly made out of

    <p>Large cells with nucleus</p> Signup and view all the answers

    Viruses can multiply by asexual and sexual reproduction

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

    Why are viruses not classed as living organisms

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

    In order to survive, pathogens require a source of nutrients, protection from harmful elements and:

    <p>Colonization of a niche in the host</p> Signup and view all the answers

    Some enveloped viruses use antigenic variation which makes it difficult for the immune system to recognise different strains of the virus. Which type of antigenic variation results in a major change in spike proteins due to gene reassortment?

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

    Which pathogen type is always a member of the normal microbiota and only causes disease in an immunocompromised host?

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

    Which type of pathogen is an environmental microbe that is able to cause disease in an otherwise healthy individual?

    <p>Primary pathogen</p> Signup and view all the answers

    Virulence factors can be described as:

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

    What kind of virulence factors are proteases, nucleases, phospholipases and glycohydrolases?

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

    Which of these virulence factors act as adhesins?

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

    Which of these virulence factors assist in promoting colonization of the host?

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

    Which of these virulence factors enable damage to be caused to the host?

    <p>Toxins and exoenzymes</p> Signup and view all the answers

    Which virulence factor does Porphyromonas Gingivalis use which leads to disregulated immunity in the gingival tissues and breakdown of the structures around the teeth?

    <p>Fimbraie and exoenzyme Gingipains</p> Signup and view all the answers

    The most abundant organisms on the human body are

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

    What type of medicine kills bacteria?

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

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