Biology 9700/31 May June 2010 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of enzyme E catalyzing sucrose hydrolysis, using potassium permanganate decolorization to track reaction progress.
2. Sampling frequency determination and recording of reaction time intervals for end-point color change in the enzyme-catalyzed reaction.
3. Preparation and implementation of control experiments to validate the enzyme's effect on sucrose hydrolysis.
4. Plotting and analysis of the relationship between time and reducing sugar mass, calculating enzyme activity rates using graph gradients.
5. Explanation of the plateau in reducing sugar production due to substrate depletion in enzyme-catalyzed reactions.
6. Plan diagrams and length calculations of structures in digestive system transverse sections, with adaptations for absorption highlighted.