Antigen
Which of the following is incorrect with regard to antigen epitopes?

A protein molecule usually contains multiple epitopes
An epitope may be shared by two different antigens
B cells bind only processed antigen epitopes
Epitopes may be linear or assembled

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Antigen
CD antigens

allow leukocytes to recognize antigen
function as receptors for cytokine and CAMs
are each expressed on only one cell type
are expressed on immune cells to mark them for separation

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Antigen
For specific antigen recognition by T cells,

MHC molecules are not required
antigen is bound by a T cell membrane antibody
antigen exposure during T cell maturation is required
denaturation of antigen does not reduce epitope recognition

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