Question

Question 1

The antigen specificity of a BCR...

A.	depends on the isotype of that BCR.

B.	is the same as the antigen specificity of the secreted form of antibody produced by that cell.

C.	is different for each of the BCRs on a cell.

D.	is different for each of the Fab regions of the BCR.

Question 2

All BCRs on the surface of a B cell in a lymph node...

A.	will have the same type of light chain (kappa/lambda).

B.	will have the same type of light chain with the same exact amino acid sequence.

C.	will each have a different type of light chain.

D.	will have a lambda light chain on one Fab and a kappa light chain on the other Fab.

Question 3

The isotype of an antibody is...

A.	determined by the light chain.

B.	another word for an immunoglobulin Fab region.

C.	determined by the heavy chain constant region.

D.	determined by the Fc portion.

E.	None of the above are correct

Question 4

Characteristics of lgG are...

A.	a molecular weight of 900,000 and 10 antigen binding sites in the secreted form.

B.	165,000 molecular weight in the monomeric form but it is usually secreted as dimer.

C.	the presence of more heavy chain constant regions than most antibodies but the lowest concentration in blood.

D.	150,000 molecular weight and the highest concentrations of all antibodies in blood.

E.	None of the above describe IgG.

Question 5

Characteristics of lgM are...

A.	900,000 molecular weight and the secreted form has 10 antigen binding sites.

B.	165,000 molecular weight in the monomeric form but it is usually secreted as dimer.

C	.the presence of more heavy chain constant regions than most antibodies but the lowest concentration in blood.

D.	150,000 molecular weight and the highest concentrations of all antibodies in blood.

E.	None of the above describe IgM.