| Date | May 2011 | Marks available | 1 | Reference code | 11M.1.SL.TZ2.30 |
| Level | Standard level | Paper | Paper 1 | Time zone | Time zone 2 |
| Command term | Question number | 30 | Adapted from | N/A |
Question
Which variable has the least effect on enzyme activity?
A. Temperature
B. Light intensity
C. pH
D. Substrate concentration
Markscheme
B
Examiners report
Most candidates answered this question correctly, making it the second easiest question in the exam.
Syllabus sections
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