Biology 9700 · 3 Enzymes
3.2 Factors that affect enzyme action
Investigate factors affecting enzyme rates, explain Vmax and Km affinity, compare competitive and non-competitive inhibition, and explore immobilised enzymes.
- Questions
- 344
- Years
- 2001–2026
- Multiple choice
- 155
- Written answer
- 189
- Average marks
- 8.9
Where this subtopic appears
- Paper 1variants 01, 11, 12, 13, 14155
- Paper 3variants 03, 31, 32, 33, 34, 35, 36, 3773
- Paper 2variants 02, 21, 22, 23, 2469
- Paper 5variants 05, 51, 52, 5328
- Paper 4variants 41, 42, 43, 4419
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | 4 | 15 | – | 19 |
| 2025 | – | 7 | 8 | 15 |
| 2023 | 3 | 10 | 15 | 28 |
| 2022 | 2 | 10 | 9 | 21 |
| 2021 | 3 | 10 | 12 | 25 |
| 2020 | 5 | 10 | 13 | 28 |
| 2019 | 2 | 11 | 9 | 22 |
| 2018 | 5 | 14 | 11 | 30 |
| 2017 | 3 | 15 | 16 | 34 |
| 2016 | 5 | 16 | 15 | 36 |
| 2015 | – | 16 | 9 | 25 |
| 2011 | – | 7 | – | 7 |
| 2010 | – | 7 | 7 | 14 |
| 2009 | – | 5 | 6 | 11 |
| 2008 | – | – | 1 | 1 |
| 2007 | – | 4 | 1 | 5 |
| 2006 | – | 2 | 1 | 3 |
| 2005 | – | 3 | 2 | 5 |
| 2004 | – | 3 | 4 | 7 |
| 2003 | – | 2 | 3 | 5 |
| 2002 | – | 1 | 1 | 2 |
| 2001 | – | – | 1 | 1 |
