| Date | November 2012 | Marks available | 1 | Reference code | 12N.1.HL.TZ0.4 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 4 | Adapted from | N/A |
Question
The following events occur in mitosis.
X: Attachment of spindle microtubules to centromeres
Y: Movement of sister chromatids to opposite poles
Z: Supercoiling of chromosomes
What is the correct sequence of events?
A. X → Z → Y
B. X → Y → Z
C. Z → X → Y
D. Z → Y → X
Markscheme
C
Examiners report
N/A
Syllabus sections
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