| Date | May 2009 | Marks available | 1 | Reference code | 09M.1.SL.TZ2.18 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 18 | Adapted from | N/A |
Question
Which term describes a molecule capable of triggering an immune response?
A. Antibody
B. Antigen
C. Pathogen
D. Antibiotic
Markscheme
B
Examiners report
N/A
Syllabus sections
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