Biology 9700/34 Oct Nov 2013 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of biological molecule diffusion through Visking tubing using plant extracts, testing for presence of carbohydrates, proteins, or lipids.

2. Standardization of test conditions for reducing sugar detection, including water sample volumes, timing, and reagent quantities.

3. Hypothesis formulation regarding diffusion patterns and prediction of trends if the experiment is extended to 30 minutes.

4. Quantification of total sugar content in various fruits, visual representation of data using bar charts, and comparison of sugar levels across fruit types.

5. Plan diagram of tubular organ wall showing tissue layer proportions, with annotations distinguishing tissue types.

6. Micrometric calculations of magnified tissue dimensions, absorption-enhancing features of tubular organs, and comparative observations between different organ sections.

7. Large-scale drawing of stained cells from organ linings, identification of eukaryotic cell features, and labeling based on observable characteristics.