Biology 9700/22 Oct Nov 2020 | Cambridge AS Level Past Papers With Mark Scheme

- Water movement through leaf cells, xylem, cell structures, pathways, and mechanisms.
- Tuberculosis treatment, antibiotic resistance, combination therapy, modes of action, and societal impact.
- RNA polymerase function, mRNA synthesis, enzyme activity, mutations, and resistance mechanisms.
- Lung tissue structure, bronchus identification, ciliated epithelium, goblet cells, and respiratory health.
- Plasma cell development, B-lymphocyte activation, clonal expansion, memory cells, and immune response.
- Enzyme activity comparison, sucrose phosphorylase, immobilized enzymes, industrial applications, and pH/temperature effects.