Which of the following statements concerning B cell receptors (BCRs)is FALSE?
A) They are formed in response to an encounter with an antigen.
B) They are complementary in shape to a specific antigenic determinant that they may or may not encounter.
C) They are bound to the surface of B lymphocytes and have two antigen-binding sites.
D) Each B lymphocyte is randomly generated with antibody variable regions that determine its BCR.
E) Scientists estimate that each person forms at least 1011 different types of B lymphocytes with distinct BCRs.

Question

Quizplus · Accepted Answer

B cell receptors (BCRs) are genetically encoded and are present on the surface of B lymphocytes before they encounter an antigen. Upon exposure to an antigen, BCRs undergo a process of affinity maturation, leading to the selection of B cells with high-affinity BCRs specific for that antigen.

Which of the Following Statements Concerning B Cell Receptors (BCRs)is