Biology 9700/31 May June 2021 | Cambridge AS Level Past Papers With Mark Scheme
- Investigation of catalase activity in plant cells, specifically in potato tissue.
- Effect of surface area on enzyme activity, measured through oxygen release.
- Standardization of variables, including diameter of potato cylinders.
- Calculation of total surface area using geometric formulas for cylinders.
- Measurement of hydrogen peroxide concentration impact on catalase activity.
- Microscopy analysis of plant leaf structure, including identification of tissues and features.

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