Antigen Processing and Presentation Pathways Quiz
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Questions and Answers

Which cellular proteins are involved in the processing of extracellular proteins for display by class II MHC molecules?

  • Proteasomes
  • Dendritic cells, macrophages, and B cells
  • CD8+ T cells
  • Late endosomes and lysosomes (correct)

    • What is the main function of the class I MHC pathway?

  • To convert proteins in the cytosol into peptides
  • To display antigens on the cell surface for recognition by CD8+ T cells (correct)
  • To transport peptides into the ER
  • To generate peptide fragments of the antigen

    • Why do the two pathways of antigen processing involve different cellular proteins?

  • To transport peptides into the ER
  • To ensure recognition of antigens from different compartments by different classes of T lymphocytes (correct)
  • To display antigens on the cell surface for recognition by CD8+ T cells
  • To generate peptide fragments of the antigen

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