Biology 9700/31 Oct Nov 2021 | Cambridge AS Level Past Papers With Mark Scheme

- Kidney function, waste removal, urine production, health check, protein concentration, mock urine.
- Serial dilution, protein solution preparation, concentration reduction, beaker labeling, distilled water addition.
- Test-tube mixing, color observation, protein presence, color symbols, result recording.
- Medical condition assessment, protein mass in urine, urinary tract infection, kidney disease indicators.
- Antibiotic resistance, Escherichia coli, percentage resistance, comparative analysis of antibiotics.
- Microscopy, plant tissue observation, cell structure, eyepiece graticule calibration, measurement of midrib width.