Biology 9700/31 May June 2016 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of reducing sugar diffusion using Visking tubing and Benedict’s test to measure concentration changes.

2. Preparation of varying reducing sugar concentrations via serial dilution, recording reaction times for color change in Benedict's test, and estimation of unknown sample concentration.

3. Enzyme-catalyzed sucrose hydrolysis, correlation between sucrose concentration and reaction rate, and effect of pH on enzymatic activity.

4. Plan and detailed cellular drawings of plant root vascular tissues, including xylem, and comparative measurements of air spaces in plant stems.

5. Adaptations of plants with air spaces for aquatic habitats and comparative anatomical analysis of plant root and stem tissue structures.