CAIE A-Level Biology AS 11.1.2 Antigens Questions
Explain antigen roles in triggering specific immune responses using evidence from each question and mark scheme.
- Syllabus
- 2028–2030
- Course
- Biology 9700
- Level
- AS
Exam points
- Explain the role of antigens in triggering specific immune responses.
CAIE A-Level Biology AS 11.1.2 Antigens Questions question 1
A person's blood group is determined by antigens present on the red blood cells.
The table shows the antigens and antibodies in the blood of people with different blood groups.
During a blood transfusion, it is essential that the person receiving the blood does not have antibodies to the donor's blood.
Which blood groups can be given to a person with blood group A B ?
A
A B only
B
O only
C
A and B only
D
A, B, AB and O
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