Biochemical Tests: Proteins The Biuret test can be carried out quickly and easily in a lab to determine if a sample contains proteins Biuret ‘reagent’ contains an alkali and copper (II) sulfate whi...
Biochemical Tests: Lipids Identifying biological molecules Different qualitative reagents can be used to identfy the presence of biological molecules in samples Ethanol is used to identify lipids B...
Biochemical Tests: Reducing Sugars & Starch Benedict’s solution can be used to carry out a semi-quantitative test on a reducing sugar solution to determine the concentration of reducing sugar p...
Practical: Factors Affecting Membrane Structure & Permeability The permeability of cell membranes is affected by different factors or conditions, such as: Temperature Solvent concentration &nbs...
Practical: Investigating Water Potential Practical 1: Investigating water potential using potato cylinders It is possible to investigate the effects of immersing plant tissue in solutions of differ...
Practical: Investigating the Rate of Diffusion Recording a range of quantitative measurements It is important to use appropriate apparatus when recording a range of quantitative measurements Quanti...
Practical: Data loggers & Computer Modelling Data loggers Dataloggers are a tool that allows for the quick and efficient gathering of data This technology can be used for simple data collection...
Practical: Investigating Biodiversity Using Sampling Use of sampling techniques in fieldwork Sampling is a method of investigating the abundance and distribution of species and populations There ar...
Drawing Cells From Blood Smears To record the observations seen under the microscope (or from photomicrographs taken) a labelled biological drawing is often made Biological drawings are line pictur...
