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Immuno Final Retake 2020 - Answers

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  1. Front
    The following is characteristic of B but not T cells: Select one:
    Back
    surface immunoglobulin
  2. Front
    Upon encountering an appropriate peptide-MHC class I on an infected cell: Select one:
    Back
    CD8+ cytotoxic T cells destroy the infected cell
  3. Front
    Which of the following molecules is expressed by both effector and memory Th1 and Tc cells? Select one:
    Back
    IL-2R
  4. Front
    Protection against intracellular pathogens is not provided by: Select one:
    Back
    mast cells
  5. Front
    γδ T cells: Select one:
    Back
    migrate preferentially to respiratory organs, skin and the peritoneal cavity
  6. Front
    Which molecules do not participate in acute inflammation: Select one:
    Back
    immunoglobulins
  7. Front
    The secondary immune response is characterized by: Select one:
    Back
    presence of memory cells
  8. Front
    Which of the following sentences is false? Select one:
    Back
    PRRs can distinguish between two different bacterial lipopolysaccharides
  9. Front
    Purification of which of the following requires negative selection in MACS?: Select one:
    Back
    lymphocytes
  10. Front
    Proteasomes of APC cells: Select one:
    Back
    degrade unneeded or damaged proteins
  11. Front
    Substances that are immunogenic only when conjugated with protein carriers are called: Select one:
    Back
    haptens
  12. Front
    Antibodies: Select one:
    Back
    help eliminate antigens from the body
  13. Front
    Microbes can evade the host immune response by: Select one:
    Back
    all answers are correct
  14. Front
    Which cells are responsible for delayed type of hypersensitivity? Select one:
    Back
    Th1 cells and macrophages
  15. Front
    Monoclonal antibodies are: Select one:
    Back
    derived from a single clone of B cells
  16. Front
    Dendritic cells (DC) present foreign antigen to T lymphocytes primarily in the: Select one:
    Back
    lymph nodes
  17. Front
    Suppression of Th1 cells by Th2 cells may be mediated by: Select one:
    Back
    IL-10
  18. Front
    HIV is able to enter and infect: Select one:
    Back
    CD4, CXCR4 and CCR5 positive cells
  19. Front
    The major advantages of „killed” over „live attenuated” viral vaccines include: Select one:
    Back
    vaccine can be given to immunodeficient patients
  20. Front
    The adaptive immune system contributes to immune surveillance of the oral cavity by the secretion of Select one:
    Back
    IgA
  21. Front
    Which type of hypersensitivity reaction is represented by contact dermatitis? Select one:
    Back
    delayed type
  22. Front
    The basic structure of a T cell receptor (TCR) consists of: Select one:
    Back
    a membrane-bound αβ or γδ heterodimer
  23. Front
    Humoral response to T- dependent antigens is characterized by: Select one:
    Back
    induction of memory cells
  24. Front
    Protection against intracellular pathogens is provided by: Select one:
    Back
    T cells and NK cells
  25. Front
    The constant region of the five major types of heavy chains of immunoglobulin molecules dictates the molecule’s: Chose one:
    Back
    isotype
  26. Front
    The rapid rise, prolonged production and elevated level of antibody that follows the second exposure to antigen is known as: Select one:
    Back
    anamnestic response
  27. Front
    Which of the following sentences is true? Select one:
    Back
    binding TLR4 to bacteria (LPS) activates APC cells
  28. Front
    Which immunoglobulin class crosses the placenta to provide a high level of passive immunity at birth: Select one:
    Back
    IgG
  29. Front
    Subliminal threshold for non-pathogenic antigen leading to tolerance is termed as: Select one:
    Back
    immunological ignorance
  30. Front
    Virally infected cells can be killed directly by: Select one:
    Back
    Natural Killer cells
  31. Front
    Classical activation of complement cascade is a property of which antibody region? Select one:
    Back
    Fc
  32. Front
    Which of the following molecules is expressed by both effector and memory Th1 and Tc cells? Select one:
    Back
    IL-2R
  33. Front
    Th2-type immune response is not characterized by: Select one:
    Back
    stimulation of CD8 T cell and their cytotoxic effect on the target cells
  34. Front
    MHC class II molecules are found on: Select one:
    Back
    B cells, antigen-presenting cells and macrophages
  35. Front
    The constant region of the five major types of heavy chains of immunoglobulin molecules dictates the molecule’s: Select one:
    Back
    isotype
  36. Front
    Activation of complement is responsible for tissue damage in: Select one:
    Back
    Immune complex–mediated hypersensitivity
  37. Front
    Phagocytosis of bacteria is accelerated by: Select one:
    Back
    opsonization of bacteria with IgG
  38. Front
    Which of the following cytokines can mediate release of acute phase proteins from the liver: Select one:
    Back
    IL-1 and IL-6
  39. Front
    Th2-type immune response is not characterized by: Select one:
    Back
    stimulation of CD8 T cell and their cytotoxic effect on the target cells
  40. Front
    An example of a privileged immunological site is the: Select one:
    Back
    testis
  41. Front
    CD4+ T cells that respond to intracellular pathogens by recruiting and activating phagocytic cells are termed: Select one:
    Back
    Th1 cells
  42. Front
    Antibody titer refers to:
    Back
    Highest dilution of antibodies still able to give a positive result in a test system

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