Chemistry 9701 · 34 Nitrogen compounds
34.4 Amino acids
Describe amino acid acid-base properties, zwitterions, peptide bond formation, and electrophoresis interpretation.
- Questions
- 50
- Years
- 2015–2026
- Multiple choice
- 3
- Written answer
- 47
- Average marks
- 11.5
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Where this subtopic appears
- Paper 4variants 41, 42, 43, 4445
- Paper 1variants 11, 133
- Paper 5variants 51, 532
Questions by year
| Year | Feb/March | May/June | Oct/Nov | Total |
|---|---|---|---|---|
| 2026 | – | 4 | – | 4 |
| 2023 | – | 4 | 1 | 5 |
| 2022 | 1 | 3 | 3 | 7 |
| 2021 | 1 | 2 | 2 | 5 |
| 2020 | 1 | 1 | – | 2 |
| 2019 | – | 1 | 3 | 4 |
| 2018 | – | 1 | 3 | 4 |
| 2017 | – | 2 | 1 | 3 |
| 2016 | 1 | 3 | – | 4 |
| 2015 | – | 7 | 5 | 12 |
