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

Question

Quizplus · Accepted Answer

B cell receptors (BCRs) are not formed in response to an encounter with an antigen; they are pre-formed with specificities before encountering antigens.

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