| Date | November 2013 | Marks available | 1 | Reference code | 13N.1.HL.TZ0.38 |
| Level | Higher level | Paper | Paper 1 | Time zone | TZ0 |
| Command term | Question number | 38 | Adapted from | N/A |
Question
What steps occur in blood clotting?
A. Fibrin is converted to fibrinogen which then alters prothrombin into thrombin.
B. Thrombin is converted to prothrombin which then alters fibrinogen into fibrin.
C. Fibrinogen is converted to fibrin which then alters prothrombin into thrombin.
D. Prothrombin is converted to thrombin which then alters fibrinogen into fibrin.
Markscheme
D
Examiners report
[N/A]
Syllabus sections
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