Biology 9700/33 May June 2024 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of ethanol concentration effects on yeast cell sedimentation, focusing on sediment height over time and procedural modifications for accuracy.

2. Analysis of ethanol production efficiency in fermentation using various carbohydrate sources and comparison between Saccharomyces cerevisiae and Schizosaccharomyces pombe.

3. Structural analysis of plant stems through microscopy, including detailed drawings and feature comparison between different plant sections.

4. Quantification of stem diameters using magnification data, emphasizing accuracy in practical measurement techniques.

5. Emphasis on experimental design, error identification (systematic vs. random), and potential improvements in methodology for reliable results.

6. Integration of biological principles with practical skills to enhance understanding of enzymatic processes, cellular dynamics, and plant structure.