Biochemical tools are methods and techniques used in the study of biological systems at a molecular level. These tools typically involve the analysis and manipulation of molecules such as proteins, enzymes, nucleic acids, and metabolites. Common biochemical tools include techniques such as protein purification, enzyme assays, gel electrophoresis, Western blotting, and PCR. These tools are essential for understanding the function and regulation of biological processes, as well as for developing new drugs and therapies.