Biochemical assays are laboratory techniques used to detect, measure or analyze biological molecules such as proteins, enzymes, DNA, RNA or metabolites. These assays involve a series of chemical reactions that produce a measurable signal, which is then used to determine the concentration, activity, or identity of the molecule of interest. Performing accurate and reliable biochemical assays requires specialized knowledge and skills in various techniques such as spectrophotometry, chromatography and electrophoresis.