Biology 9700/33 Oct Nov 2023 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of yeast enzyme activity immobilized in alginate beads, analyzing the hydrolysis of sucrose into reducing sugars using Benedict's test.

2. Evaluation of the effect of bead number on enzymatic activity, controlling temperature with a water bath and recording color change times.

3. Study of temperature effects on immobilized versus free pectinase activity, measuring fruit juice yield, and explaining enzyme stability differences.

4. Comparative analysis of leaf structures, drawing plan diagrams, and noting observable differences between stained sections of different plant species.

5. Measurement and calculation of vascular bundle lengths and percentage differences, emphasizing precision and accuracy in microscopy-based studies.

6. Application of enzymatic assays, data graphing, and procedural adjustments to enhance experimental outcomes and result reliability.