The many different proteins in serum can be analyzed by a(n):
a. Anti-antibody test
b. Complement fixation test
c. Precipitation test
d. Immunodiffusion test

A direct ELISA test is utilized as a pregnancy test because it tests for:

a. Antibodies to the fetus in urine

b. Antibodies to a pregnancy hormone in urine

c. An antigen that recognizes a pregnancy hormone in urine

d. T cells that recognize a pregnancy hormone in urine

e. The presence of a pregnancy hormone in urine

Describe one difference between a direct ELISA and an indirect ELISA.

When antigen and antibodies combine, maximal precipitation occurs when:

a. Antigen is in excess

b. Antibody is in excess

c. Antigen and antibody are at equivalent concentrations

d. Antigen is added to the antibody

An anti-antibody is used when:

a. An antigen is not precipitating

b. An antibody is not agglutinating

c. An antibody does not activate complement

d. The antigen is an antibody

A direct fluorescent immunoassay requires which of the following?

a. Heat-inactivated serum

b. Fluorescent serum

c. Immune complexes

d. Antibodies against the antigen

An ELISA uses which of the following reagents?

a. Enzyme-labeled anti-antibody

b. Radioactive anti-antibody

c. Source of complement

d. Enzyme-labeled antigen

Which of the following is a good test to detect rabies virus in the brain of a dog?

a. Agglutination

b. Hemagglutination inhibition

c. Virus neutralization

d. Direct fluorescent antibody

An antiserum is:

a. An anti-antibody

b. An inactivated vaccine

c. Formed of monoclonal antibodies

d. The liquid portion of blood used for immunization