A complete T-cell receptor on a helper T cell contains both the antigen-binding receptor molecule and a ________ protein for signal transduction.
A) CD8
B) CD3 complex
C) MHC I
D) MHC II
E) CD28

Question

Quizplus · Accepted Answer

The CD3 complex is required for the transmission of signals from the T-cell receptor into the cell, leading to activation of the T cell. CD8 and MHC I are involved in the recognition of antigens presented on the surface of infected or cancerous cells by cytotoxic T cells. CD28 is a co-stimulatory receptor on T cells that enhances T cell activation. MHC II is involved in antigen presentation to CD4+ helper T cells.

A Complete T-Cell Receptor on a Helper T Cell Contains