Biology 9700/34 Oct Nov 2012 | Cambridge AS Level Past Papers With Mark Scheme

1. Effect of enzyme concentration on protein hydrolysis in milk, preparation of serial dilutions, and control setup for experiment validation.

2. Analysis of pH influence on protease activity using gelatine as substrate; graphical representation and trend descriptions for enzymatic rate differences.

3. Plan and detailed drawings of Himalayan leaf cross-sections, including xylem and chloroplast localization in palisade cells.

4. Measurement and ratio calculation of anatomical features in leaf sections, comparison of leaf specimen characteristics, and observable structural differences.