Biology 9700/34 May June 2015 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigating catalase activity in plant extracts by preparing serial dilutions, measuring oxygen release, and analyzing enzyme kinetics with solution X.

2. Identifying significant errors and suggesting improvements in enzyme activity measurement techniques, including bubble counting and water displacement methods.

3. Evaluating the relationship between giraffe neck length and left ventricle muscle wall thickness, plotting data, and estimating values from graphical trends.

4. Differentiating blood vessels through transverse sections, calculating vessel diameter-to-wall thickness ratios, and analyzing structural features for function.

5. Examining xylem structure in plant stems, comparing it with blood vessels, and identifying shared transport features facilitating material movement.