AQA - AS and A-Level Biology - 7402

3.1 Biological Molecules

3.1.2 Carbohydrates

AT f: Students could use, and interpret, the results of qualitative tests for reducing sugars, non-reducing sugars and starch.
AT c: Students could produce a dilution series of glucose solution and use colorimetric techiques to produce a calibration curve with which to identify the concentration of glucose in an unknown solution.

3.1.4 Proteins

3.1.4.1 General Properties of Proteins

AT f: Students could use, and interpret the results of, a biuret test for proteins.

3.1.4.2 Many proteins are enzymes

Required practical 1: Investigation into the effect of a named variable on the rate of an enzyme-controlled reaction.
PS 2.4: Students could identify the variables that must be controlled in their investigation into rate of reaction.
PS 3.3: Students could calculate the uncertainty of their measurements of the rate of reaction.
MS 3.2: Students could select an appropriate format for the graphical presentation of the results of their investigation into the rate of enzyme controlled reactions.
MS 3.6: Students could use a tangent to find the initial rate of an enzyme-controlled reaction.

3.2 Cells

3.2.3 Transport across cell membranes.

Required practical 4: Investigation into the effect of a named variable on the permeability of cell-surface membranes.
MS 3.2: Students could plot the data from their investigations in an appropriate format.

3.5 Energy transfers in and between organisms (A-level only)

3.5.1 Photosynthesis (A-level only)

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

3.5.2 Respiration (A-level only)

AT b: Students could use a redox indicator to investigate dehydrogenase activity.
Required practical 9: Investigation into the effect of a named variable on the rate of respiration of cultures of single-celled organisms.

3.6 Organisms respond to changes in their internal and external environments (A-level only)

Required practical 11: Production of a dilution series of a glucose solution and use of colorimetric techiques to produce a calibration curve with which to identify the concentration of glucose in an unknown 'urine' sample.

3.7 Genetics, populations, evolution and ecosystems (A=level only)

3.7.4 Populations in ecosystems (A-level only)

AT i: Students could use turbidity measurements to investigate the growth rate of a broth culture of microorganisms.