IB Biology HL 3.2.6 Lymphocytes Question Bank
Practise IB Biology HL 3.2.6 by relating antigen recognition, T-cell activation, clonal expansion and antibody production to specific immunity.
- Syllabus
- First assessment 2025
- Course
- Biology HL
- Level
- HL
Exam points
- Relate antigen recognition, T-cell activation, clonal expansion and antibody production to specific immunity.
- Interpret immune-response diagrams to identify lymphocyte stages, helper-cell functions and memory-cell formation.
C3.2.6—Lymphocytes question 1
[Maximum number: 7]
Multicellular organisms benefit from cell specialization and division of labour.
Explain how cells in the bloodstream cause a specific immune response.
a. (specific immune response is) production of antibodies in response to a particular pathogen;
b. antibody is specific to/binds to a specific antigen;
c. macrophages/phagocytes engulf/present antigens from pathogens/viruses/bacteria;
d. T lymphocytes activated by antigens/antigen presentation/antigens presented by macrophage;
e. (activated) T lymphocytes activate B lymphocytes;
f. only B lymphocytes that produce antibodies against the antigen/pathogen are activated;
g. (activated) B lymphocytes clone/divide by mitosis to form plasma cells;
h. plasma cells then secrete (large quantity) of an antibody/secrete antibodies of same type;
i. some B lymphocytes/plasma cells form memory cells;
j. memory cells give long lasting immunity/faster response to a disease/pathogen;
Marking guidance:
Accept B and T cells instead of B and T lymphocytes
7 max
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