| Date | May 2010 | Marks available | 1 | Reference code | 10M.1.HL.TZ1.21 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Identify | Question number | 21 | Adapted from | N/A |
Question
What prevents antibiotics from being effective against viruses?
A. Viruses have a high rate of mutation.
B. Viruses have no RNA.
C. Viruses have no metabolism.
D. Viruses have a protein shell that protects them.
Markscheme
C
Examiners report
This question turned out to be a very good discriminator. Many candidates believed that due to the high rate of mutation of the virus, the antibiotics are ineffective against them.
Syllabus sections
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