Required practical PACK  and Required practical PACK with KEY ANSWERS

Year 1 Practicals

RP 1. Investigation into the effect of a named variable on the rate of an enzyme-controlled reaction

RP 2. Preparation of stained squashes of cells from plant root tips; setup and use of an optical microscope to identify the stages of mitosis in these stained squashes and calculation of a mitotic index

RP 3. Production of a dilution series of a solute to produce a calibration curve with which to identify the water potential of plant tissue

RP 4. Investigation into the effect of a named variable on the permeability of cell-surface membranes

RP 5. Dissection of animal or plant gas exchange or mass transport system or of organ within such a system

RP 6. Use of aseptic techniques to investigate the effect of antimicrobial substances on microbial growth

Year 2 Practicals

RP 7. Use of chromatography to investigate the pigments isolated from leaves of different plants, eg leaves from shade-tolerant and shade-intolerant plants or leaves of different colours

RP 8. Investigation into the effect of a named factor on the rate of dehydrogenase activity in extracts of chloroplasts

RP 9. Investigation into the effect of a named variable on the rate of respiration of cultures of single-celled organisms (e.g. yeast)

RP 10. Investigation into the effect of an environmental variable on the movement of an animal using either a choice chamber or a maze

RP 11. Production of a dilution series of a glucose solution and use of colorimetric techniques to produce a calibration curve with which to identify the concentration of glucose in an unknown ‘urine’ sample

RP 12. Investigation into the effect of a named environmental factor on the distribution of a given species