CAIE A-Level Biology AS 11.1.3 Primary Immune Response Sequence Questions
Describe the primary immune response sequence after antigen exposure using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- AS
Exam points
- Describe the sequence of the primary immune response after first exposure to an antigen.
CAIE A-Level Biology AS 11.1.3 Primary Immune Response Sequence Questions question 1
[Maximum number: 1]
The events listed occur during the primary immune response to a specific pathogen.
1 activation of B-lymphocyte to produce plasma cells and memory cells
2 phagocytosis of invading pathogens by macrophages
3 T-helper cell activation and production of T-killer cells
4 expression of antigens on phagocyte cell surface
5 production and release of antibodies
Which row identifies a correct sequence of events?
A
5
1
2
4
2
4
3
1
last
4
2
1
5
3
4
2
3
1
5
B
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