Biology 9700/35 Oct Nov 2016 | Cambridge AS Level Past Papers With Mark Scheme

1. Effect of ethanol concentration on methylene blue release from stained plant tissue using simple dilution and test-tube arrangement.
2. Observation and intensity matching of ethanol concentrations for color analysis and estimation of unknown ethanol concentration.
3. Effect of temperature as an independent variable for modifying methylene blue release investigation.
4. Impact of sucrose concentration on potato tissue mass; calculation of percentage change and graphical analysis for interpolation of intermediate concentrations.
5. Plan diagram and detailed drawing of root tissue from a plant slide, highlighting xylem and structural differences between adjacent cells.
6. Measurement and comparison of airspace diameters in transverse stem sections with calculations for mean actual diameter and structural differences between stem and root tissues.