A-LevelBiologyImmunity9700/12 · May/June 2014 · Q351 Mark
During a primary immune response, the following events occur. 1 Some B-lymphocytes form plasma cells. 2 B-lymphocytes with the specific cell surface receptors divide repeatedly by mitosis. 3 Specific antibody is produced. 4 T-helper cells secrete cytokines. 5 T-helper cells identify a specific antigen. In which order will the events occur?
A2→1→4→3→5
B2→4→3→1→5
C5→4→2→1→3
D5→4→3→1→2
✓ Correct answer
C: 5→4→2→1→3
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