Biology 9700/35 Oct Nov 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of enzyme-catalyzed oxygen release from hydrogen peroxide, serial dilution preparation of peroxide concentrations, and foam height measurement as a proxy for reaction rate.

2. Error identification in foam height measurements, modification of procedures to assess copper sulfate's effect on enzyme activity.

3. Microscopic examination of plant leaf structure, plan diagram of vascular bundle, and cellular drawings of palisade and epidermal cells.

4. Calculations of field of view area using a stage micrometer, stomatal density estimation, and comparison of stomatal distributions across leaf surfaces.

5. Observable structural differences between leaf surfaces analyzed under photomicrographs, focusing on stomatal pattern and density variation.