| Date | May 2012 | Marks available | 1 | Reference code | 12M.1.HL.TZ2.2 |
| Level | Higher 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
N/A
Syllabus sections
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