Biology 9700/31 Oct Nov 2014 | Cambridge AS Level Past Papers With Mark Scheme

1. Enzyme-catalyzed hydrolysis of triglycerides into fatty acids and glycerol, using milk as the substrate and indicator-based endpoint detection.

2. Preparation of various enzyme solution concentrations by simple dilution, expected trend in reaction rates, and setup of control experiments.

3. Significant error identification in time measurements, syringe accuracy evaluation, and optimizing investigation for accurate temperature-dependent enzyme activity.

4. Plan diagrams of vascular bundles in plant stem sections, detailed cellular drawings of pith tissue, and magnification calculations from photomicrographs.

5. Effect of sucrose concentration on plant stem curvature, graphical representation of distance changes, and osmotic behavior analysis related to solution concentration.