A researcher is studying the interactions between foreign antigens and human immune cells. She has isolated a line of lymphocytes that is known to bind antigen-presenting cells. From this cell line, she has isolated a cell surface protein that binds to class I major histocompatibility complex molecules. The continued activation, proliferation and survival of this specific cell line requires which of the following signaling molecules?
AInterleukin 1
BInterleukin 4
CInterleukin 2
DInterleukin 8
EInterleukin 6
Which of the following is not a component of innate immunity?
AEpithelial barriers
BNK cells
CDendritic cells
DHelper T lymphocytes
IL-2 is secreted by?
AHelper T-cells
BNeutrophils
CNK cells
DMacrophages
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