Biology 9700/33 May June 2018 | Cambridge AS Level Past Papers With Mark Scheme

1. Estimating sucrose concentration in fruit extract using the non-reducing sugar test and proportional dilutions of known concentrations.

2. Identifying errors in Benedict's test procedure, improving accuracy by refining sucrose solution concentrations below 2.0%.

3. Calculating the percentage of sugars in fruit from mass data and visualizing sugar type distribution using bar charts.

4. Identifying the source of sucrose in plants and the phloem loading mechanism through active transport.

5. Drawing plan diagrams of plant stem cross-sections, detailing vascular and surrounding tissues for structural analysis.

6. Measuring stem width using calibrated eyepiece graticules, comparing structural differences between two plant species based on photomicrographs.