When does the full repertoire of antibody-producing cells (all such cells that a person will ever have)appear in the lymphoid tissue?
A)in the fertilized egg
B)before stimulation by any antigen
C)before stimulation by any antibody
D)after stimulation by all of the possible antibodies
E)after stimulation by any of the possible antigens

Question

Quizplus · Accepted Answer

The full repertoire of antibody-producing cells appears in the lymphoid tissue before stimulation by any antigen. This is because during embryonic development, precursor cells give rise to all the different types of lymphocytes, including B cells that produce antibodies. These precursor cells then undergo genetic rearrangements to generate a diverse repertoire of lymphocytes capable of recognizing a wide variety of antigens. Therefore, the full repertoire is present before any exposure to stimuli, such as antigens or antibodies.

When Does the Full Repertoire of Antibody-Producing Cells (All Such