Biology 9700/35 May June 2018 | Cambridge AS Level Past Papers With Mark Scheme

1. Investigation of enzyme-catalyzed hydrolysis of sucrose by varying substrate concentrations, serial dilution preparation, and measurement of endpoint timing with potassium manganate(VII).

2. Rate calculation of enzyme activity using experimental data, modification of procedures for different variables, and standardization methods for substrate concentration in enzyme reactions.

3. Analysis of enzyme inhibition effects on reaction rates, graphical representation of substrate concentration versus enzyme activity, and identification of inhibition type based on observed Vmax.

4. Examination of plant stem anatomy through observation of transverse sections, construction of plan diagrams, and comparison of vascular bundles and other tissues in different specimens.

5. Calibration of eyepiece graticules using a stage micrometer, unit conversion for microscopy measurements, and calculation of actual tissue lengths from calibrated images.