Biology 9700/31 May June 2019 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigating the effect of pH on catalase activity using plant extract and potassium manganate(VII) as a hydrogen peroxide indicator.

2. Measuring oxygen release from hydrogen peroxide breakdown at different temperatures to assess catalase activity.

3. Plotting data on the effect of temperature on enzymatic activity and determining optimal temperature for oxygen production.

4. Drawing and labeling plant root cross-sections to analyze tissue structure and cell arrangements.

5. Comparing anatomical differences between root samples through photomicrograph analysis and calculating actual root dimensions using scale bars.