What is meant by the terms (A) antigen processing and (B) antigen presentation? (C) Why are these processes required before T cells can be activated?
What will be an ideal response?
A. Antigen processing is the intracellular breakdown of pathogen-derived proteins into peptide fragments that are of the appropriate size and specificity required to bind to MHC molecules.
B. Antigen presentation is the assembly of peptides with MHC molecules and the display of these complexes on the surface of antigen-presenting cells.
C. Antigen processing and presentation must occur for T cells to be activated because (1) T-cell receptors cannot bind to intact protein, only to peptides, and (2) T-cell receptors do not bind antigen directly, but rather must recognize antigen bound to MHC molecules on the surface of antigen-presenting cells.
You might also like to view...
What is the positive control when doing a skin test for type I hypersensitivities?
A) Nonsuspected allergen B) Diluent without allergen C) Auspected allergen D) Histamine
Design a behavior modification plan to change one negative behavior in your life. Include short- and long-term goals that are realistic, measurable, and time specific
What will be an ideal response?
Refined grains are often enriched primarily to add fiber back into the product
a. True b. False
An increased rate of metabolism of fat following exercise is the:
a. afterburner effect. b. training effect. c. aerobic effect. d. anaerobic effect.