Biology 9700/01 Oct Nov 2006 | Cambridge AS Level Past Papers With Mark Scheme

1. Microscope calibration: measuring plant cell and chloroplast dimensions using eyepiece graticule and stage micrometer.

2. Protein structure bonds: primary (peptide), secondary (hydrogen), and tertiary (disulfide, ionic, hydrophobic) levels.

3. Enzyme kinetics: competitive inhibitor effects on reaction rates with increasing substrate concentration.

4. Osmosis in potato tubers: sucrose solution effects on water potential, elongation changes, and water movement dynamics.

5. DNA replication mechanisms: semi-conservative model validated by isotopic labeling, centrifugation band patterns post-generation.

6. Photosynthesis and transpiration: xylem water potential gradients, stomatal evaporation sites, and companion cell mitochondria roles.

7. Respiratory system studies: spirometer lung volume measurement, smoking impacts on lung cancer rates, and hemoglobin-myoglobin oxygen affinity comparisons.

8. Immune system functionality: B vs. T lymphocytes differentiation, bone marrow origins, and antibody-mediated active immunity responses.