Biology 9700/32 May June 2024 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of protease concentration's effect on milk clotting, including proportional dilutions, repeat trials, and error identification for accuracy improvement.

2. Analysis of protease activity under varying pH levels, involving data plotting and explanation of enzymatic activity trends.

3. Structural analysis of xerophytic leaf adaptations using a transverse section; features like trichomes and vascular bundles observed and labeled.

4. Stomatal width calculated as a percentage of guard cell width, using a scanning electron micrograph for precise measurements.

5. Comparison of leaf surfaces from two plants, identifying observable differences like stomatal distribution, trichome density, or surface texture.

6. Application of microscopy techniques, emphasizing practical skills in drawing, labeling, and analyzing plant structures for ecological and functional insights.