Biology 5090 · 5 Enzymes
5.1 Enzyme action
Define catalysts and enzymes, explaining specific enzyme action using the lock-and-key hypothesis.
- Questions
- 149
- Years
- 2004–2026
- Multiple choice
- 81
- Written answer
- 68
- Average marks
- 6.9
Where this subtopic appears
- Paper 1variants 01, 11, 1281
- Paper 2variants 02, 21, 2228
- Paper 3variants 03, 31, 3220
- Paper 6variants 06, 61, 6218
- Paper 4variants 412
Questions by year
| Year | May/June | Oct/Nov | Total |
|---|---|---|---|
| 2026 | 5 | – | 5 |
| 2023 | 3 | 6 | 9 |
| 2022 | 10 | 8 | 18 |
| 2021 | 4 | 4 | 8 |
| 2020 | 2 | 7 | 9 |
| 2019 | 8 | 4 | 12 |
| 2018 | 3 | 4 | 7 |
| 2017 | 3 | 3 | 6 |
| 2016 | 6 | 4 | 10 |
| 2015 | 6 | 4 | 10 |
| 2014 | – | 3 | 3 |
| 2013 | 2 | 7 | 9 |
| 2012 | 6 | 3 | 9 |
| 2011 | 2 | 1 | 3 |
| 2010 | – | 2 | 2 |
| 2009 | 2 | 2 | 4 |
| 2008 | 5 | 2 | 7 |
| 2007 | 1 | 4 | 5 |
| 2006 | 2 | 2 | 4 |
| 2005 | 3 | 3 | 6 |
| 2004 | 2 | 1 | 3 |
