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

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

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Antigen
CD antigens

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

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

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

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