Biology 9700/51 Oct Nov 2014 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of immobilized vs. free ethanol dehydrogenase activity using methylene blue to indicate oxidation.

2. Identification of independent and dependent variables: enzyme state and reaction rate.

3. Experimental control setup to ensure validity of enzyme activity measurements.

4. Statistical analysis of reaction rates, interpreting standard deviation and significance at \\( P < 0.05 \\).

5. Study of \\( ^{32} \\)P phosphate ion distribution in a plant community to trace nutrient flow and trophic relationships.

6. Evaluation of feeding relationships based on radioactivity in primary, secondary, and tertiary consumers.

7. Recommendations for improving community feeding relationship studies through broader sampling and controlled variables.