| Date | May 2015 | Marks available | 1 | Reference code | 15M.1.HL.TZ1.9 |
| Level | Higher level | Paper | Paper 1 | Time zone | Time zone 1 |
| Command term | Deduce | Question number | 9 | Adapted from | N/A |
Question
Why does exposure to high temperatures cause an enzyme to lose its biological properties?
A. The substrate blocks the active site at high temperatures.
B. The three dimensional structure of the enzyme becomes changed.
C. Chemical reactions cannot take place at high temperatures.
D. High temperatures increase the activation energy of reactions.
Markscheme
B
Examiners report
[N/A]
Syllabus sections
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