| Date | May 2013 | Marks available | 1 | Reference code | 13M.1.HL.TZ2.37 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 37 | Adapted from | N/A |
Question
What is the function of thrombin in the process of blood clotting?
A. It acts as a catalyst.
B. It criss-crosses the wound to trap blood cells.
C. It changes from a soluble protein to an insoluble fibrous protein.
D. It releases clotting factors from platelets.
Markscheme
A
Examiners report
N/A
Syllabus sections
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