Indicate whether each of the following descriptions better applies to B cell receptors (B) or T cell receptors (T). Your answer would be a four-letter string composed of letters B and T only, e.g. BTTT.
( ) They can also be produced as secreted antibodies with the same antigen specificity.
( ) They diversify by class switching and somatic hypermutation.
( ) They often exist as heterodimers.
( ) They have a relatively low antigen-binding affinity.

Question

Indicate whether each of the following descriptions better applies to B cell receptors (B) or T cell receptors (T). Your answer would be a four-letter string composed of letters B and T only, e.g. BTTT.
( )	They can also be produced as secreted antibodies with the same antigen specificity.
( )	They diversify by class switching and somatic hypermutation.
( )	They often exist as heterodimers.
( )	They have a relatively low antigen-binding affinity.

Quizplus · Accepted Answer

B cell receptors are tetramers made up of two identical heavy chains and two identical light chains; they can also be made in the form of soluble antibodies and can undergo affinity maturation by somatic hypermutation. T cell receptors are heterodimers; they do not undergo somatic hypermutation and affinity maturation and therefore have relatively low affinity for antigen.

Indicate Whether Each of the Following Descriptions Better Applies to B