The specificity of an antibody is determined by the (a) fixed segment, (b) antigenic determinants, (c) variable region, (d) size of the antibody, (e) antibody class.

Explain how active immunity and passive immunity differ.

Mark the following statements as true or false. If a statement is false, correct is to make a true statement.

c. Subunit vaccines consist of pathogens that are alive but unable to cause disease.

What major advantage is conveyed by having a system of adaptive immunity?

Cytotoxic T cells are primarily involved in ____________.