Biology 9700/05 May June 2007 | Cambridge AS Level Past Papers With Mark Scheme

1. Frequency histogram plotting and mean value calculations for seed numbers per pod, including standard deviation and error analysis to understand data variability.
2. Respirometer-based investigation of respiration rates in small invertebrates and germinating seeds, with predictions based on metabolic activity and respiratory quotient calculations.
3. Control of variables in immobilized enzyme experiments, including substrate concentration and temperature, to ensure accurate reaction rate measurements.
4. Identification of anomalous results in enzyme data tables and improvement suggestions for experimental reliability through additional replicates and consistent sample preparation.
5. Comparative enzyme activity analysis at varying concentrations, emphasizing proportional relationships between enzyme concentration and reaction rates.