AQA 'AS' and 'A' level Biology required practicals suitable for use with a colorimeter.

Practical 1

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

Practical 4

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

Practical 8

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

Practical 9

Investigation into the effect of a named variable on the rate of respiration of cultures of single-celled organisms.

Practical 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.