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kiranmayi
Forum Guru Topics: 237 Posts: 407 |
Antigens processed by the exogenous antigen presentation pathway are presented in association with which of following? A. Fc receptors B. IgG heavy chains C. MHC class I molecules D. MHC class II molecules E. T cell receptor (TCR)
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dxtxpx
| Forum Guru Topics: 259 Posts: 1233
choice C
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asmi
| Forum Hero Topics: 1049 Posts: 4620
D..
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kiranmayi
| Forum Guru Topics: 237 Posts: 407
The correct answer is D. When pathogenic organisms are phagocytized and degraded in the exogenous antigen presentation pathway, the antigenic molecules are presented on the surface of the antigen-presenting cell by MHC class II molecules to a CD4+ T lymphocyte with a specific TCR for the specific antigenic epitope. In the endogenous antigen presentation pathway (eg, a virus infecting a cell), the cell would display epitopes from the virus in association with class I molecules (choice C) to the CD8+ cytotoxic T cell.
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dxtxpx
| Forum Guru Topics: 259 Posts: 1233
thanks
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