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Biology 9700/51 Oct Nov 2022 | Cambridge AS Level Past Papers With Mark Scheme

- Antibiotic resistance in bacteria, global health issue, research into antibacterial substances, honey as an alternative.
- Manuka honey, antibacterial properties, methylglyoxal (MGO), hydrogen peroxide, Bacillus subtilis, aerobic respiration.
- Measurement of bacterial growth, turbidity as an indicator, broth culture methodology, control experiments.
- Preparation of dilutions, concentration calculations, stock solutions, 10% honey solution, graduated pipettes.
- Independent and dependent variables, experimental design, prediction of results, statistical analysis using chi-squared test.
- Gossypol toxicity in livestock, dietary impacts on milk production, genetically modified cotton plants, risk assessment of gossypol intake.
CIE AS & A Level Biology (9700) Nov 2022

Laura Bellini

Classification: Paper 5
Page count: 16
Viewed: 66
Last update: 12 days ago
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