Allelic exclusion at the α chain locus is tightly regulated and very rarely will a T-cell express a second α chain.

Positive selection typically takes place before negative selection in the thymus.

Binding of TCR to MHC + peptide along with costimulatory interaction induces naive T-cells to produce?

Cytotoxic T-cells granular contents can induce apoptosis with which of the following cytotoxins in the granules?

Which of the following is true about dendritic cells?

Which T-cell/s are CD8 T-cells?

What is the costimulatory molecule induced on a dendritic cell when it recognizes a pathogen ____?  What is the receptor on the T-cell surface that binds to this costimulatory molecule _____?

T helper 1 cells secrete _____ cytokines.

Which lymphocyte has very light staining granules and is in very high concentration in the blood?

Dendritic cells utilize _________ to process and present antigen.