Biology 9700/52 May June 2010 | Cambridge AS Level Past Papers With Mark Scheme

1. Hypothesis development and experimental procedure for comparing transpiration rates in mesophytes and xerophytes using a potometer.
2. Calculation of water loss rate normalized by leaf surface area and identification of appropriate statistical tests for analyzing significance in water loss differences.
3. Measurement of water loss in leaves with varied wax coverage to deduce transpiration patterns and draw conclusions on leaf surface roles.
4. Investigation of fibroblast growth stimulation by glutamine versus inhibition by glutamic acid, analyzing concentration-dependent effects on cell proliferation.
5. Control of experimental variables in cell culture studies to maintain consistency in nutrient availability and environmental conditions.
6. Proportional cell number increase calculations and hypothesis assessment using growth data from amino acid concentration experiments.