3. Adaptive Immune Responses

B Cell Activation — Quiz

Test your understanding of b cell activation with 5 practice questions.

Practice Questions

Question 1

Which B cell subset is primarily responsible for mounting T-independent type 1 responses to bacterial lipopolysaccharide?

Question 2

In CD40L deficiency (X-linked hyper-IgM syndrome), which histological feature is absent in secondary lymphoid follicles?

Question 3

A population of germinal center B cells expresses high CXCR4 and low CXCR5. To which zone are these cells localized?

Question 4

During class switch recombination, which DNA repair pathway primarily mediates the joining of double-strand breaks at switch regions?

Question 5

During a germinal center reaction, centroblasts double every 6 hours. If one cell enters the dark zone and proliferates for 24 hours, approximately how many cells will be present?