| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.SL.TZ2.2 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Outline | Question number | 2 | Adapted from | N/A |
Question
How do cells in multicellular organisms differentiate?
A. Some cell types divide by mitosis more often than others.
B. They express some of their genes but not others.
C. Some of their proteins denature but not others.
D. Their DNA content changes with time.
Markscheme
B
Examiners report
This question discriminated well, and many candidates chose option A, which is a correct statement, but is not answering the question asked.
Syllabus sections
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