Multiple Choice
Which proteins on the antigen-presenting cell are recognized by the helper T-cell?
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21. The Immune System
Major Histocompatibility Complex Molecules
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Which type of major histocompatibility complex (MHC) molecule is found on all nucleated cells?
A
MHC Class II
B
MHC Class IV
C
MHC Class III
D
MHC Class I
Verified step by step guidance1
Understand the role of major histocompatibility complex (MHC) molecules in the immune system. MHC molecules are crucial for the immune system to recognize foreign molecules.
Learn about the different classes of MHC molecules. There are two primary classes: MHC Class I and MHC Class II. MHC Class III is not typically involved in antigen presentation.
MHC Class I molecules are present on all nucleated cells. This is important for the immune system to monitor the health of cells and detect any that are infected or cancerous.
MHC Class II molecules are found primarily on antigen-presenting cells such as macrophages, dendritic cells, and B cells. They present antigens to helper T cells.
Recognize that MHC Class I molecules are the correct answer for the type of MHC molecule found on all nucleated cells, as they are involved in presenting endogenous antigens to cytotoxic T cells.
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