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
Epitopes may be linear or assembled
B cells bind only processed antigen epitopes

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Antigen
During the lag period between antigen contact and detection of adaptive immunity,

innate immune effectors are eliminating antigen
new B and T cells with the appropriate antigen specificity must be produced in the bone marrow
antigen is hidden from the immune system in macrophages
innate immunity blocks the activation of adaptive immune effector cells

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Antigen
For specific antigen recognition by T cells,

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

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Antigen
CD antigens

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

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