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31. Which part of this T cell receptor is produced only AFTER the T cell has bound an antigen? A. The part labeled A B. The37. How do Treg cells differ from Th cells? A. When Treg cells bind B7, they engulf and destroy it. B. Treg cells secrete apo

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Answer #1

Question 31

Choice B. Part labelled “B”

Explanation: Part B in the diagram is Alpha and beta T cell receptors which recognise the antigen which is peptide bounded and bind. This is mediated or assisted by the clas I and II MHC molecules.

Question 32

Choice D. T reg Cells recognize endogenous antigen on MHC-I.

Explation: T reg cells are CD8 molecule receptors which recognise only MHC class I molecules on the cell surface. While T helper cells are CD4 molecules recognise MHC class II molecules on the cell surface.

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