Biology 9700/33 March 2020 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigating the effect of temperature on catalase activity in yeast suspension by measuring the rate of oxygen release.

2. Preparing hydrogen peroxide dilutions and standardizing variables for enzyme activity experiments.

3. Analyzing enzyme activity across a pH range and estimating activity at specific pH values using graphs.

4. Observing and drawing starch grains, identifying specific patterns, and measuring their dimensions using graticules.

5. Constructing plan diagrams of plant root transverse sections and labeling starch-containing tissues.

6. Recording and comparing observable anatomical differences between roots of different plant species.