Biology 9700/33 Oct Nov 2017 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigating the effect of pH on enzyme-catalyzed reactions by measuring foam height from oxygen release.

2. Recording foam height measurements at specified time intervals and estimating buffer pH from comparative data.

3. Modifying procedures to study substrate concentration effects on enzyme activity while keeping pH constant.

4. Graphing enzyme activity rates across temperature ranges and analyzing thermal denaturation impacts.

5. Drawing plan diagrams of plant stem transverse sections, identifying vascular tissue, and calculating air space dimensions.

6. Comparing anatomical differences in stem structures from various plant specimens through observational data.