Biology 9700/33 Oct Nov 2019 | Cambridge AS Level Past Papers With Mark Scheme

1. Preparation of serial dilutions for copper sulfate solution to study its inhibitory effect on enzyme E activity during starch hydrolysis.

2. Measurement of starch disappearance time using iodine on a white tile and analysis of results to determine copper sulfate concentration.

3. Graphical analysis of temperature effects on enzyme E activity, with interpretation of reaction rates at specific temperature intervals.

4. Structural observations and labeled diagrams of plant leaf sections, including identification of epidermal tissue and its cellular arrangement.

5. Calculation of actual leaf thickness and mean cell length using magnification and provided measurements, with step-by-step working.

6. Tabulation and comparison of observable differences between two plant leaf specimens based on anatomical and histological features.