Biology 9700/33 March 2024 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of enzyme activity in seeds from two plant species, measuring reducing sugar concentration through Benedict’s test and serial dilution.

2. Semi-quantitative methods to compare sugar concentrations, emphasizing precise timing and color changes during reactions.

3. Structural analysis of plant leaf sections, identifying epidermis, vascular bundles, and observable adaptations for water environments.

4. Quantitative measurements of air spaces in aquatic plant leaves, including calculations of mean actual lengths using magnification.

5. Use of photomicrographs to identify anatomical differences between plant species and adaptations for specific ecological niches.

6. Practical emphasis on accurate labeling, measurement, and analysis of enzymatic activity and plant tissue features in laboratory investigations.