Biology 9700/33 March 2016 | Cambridge AS Level Past Papers With Mark Scheme

1. Determination of protein concentration in urine using potassium hydroxide and copper sulfate, colorimetric analysis, and estimation of unknown sample concentrations.

2. Standardization of protein concentration tests to ensure accuracy and minimize variability in results.

3. Microscopic preparation and observation of onion epidermal cells kept in solutions of different water potentials, with comparisons drawn between cellular plasmolysis.

4. Measurement and analysis of red blood cell dimensions and shape variations under osmotic stress, including calculations of mean diameter for crenated cells.