Question: 1. Affinity maturation
A. is caused by hypermutation
B. occurs in variable regions
C. Leads to in…
1. Affinity maturation
A. is caused by hypermutation
B. occurs in variable regions
C. Leads to increased binding affinity
D. All of the above
2. Which mechanism is not used to regulate complement
activation?
A. Binding of C3b to DAF
B. Formation of inhibitory C1 complex
C. Polymerization of C9
D. Degredation of C3b
3. Which one of the following statements about humoral immune
responses is true?
A. Naive B cells are required for initiation of primary
responses and memory B cells are required for initiation of
secondary responses
B. Antibody responses to bacteria polysaccharides antigens
require CD4+ helper T cells
C. Affinity maturation does not require helper T cells
D. Antibody secreting cells generated during a humoral immune
response live for only a few hours