"Biochemical" refers to the study of the chemical processes and substances that occur within living organisms. This field combines principles from both biology and chemistry to understand how molecules like proteins, lipids, carbohydrates, and nucleic acids interact and function in biological systems. Biochemical research is essential for various applications, including medicine, agriculture, and environmental science. It helps scientists develop new drugs, improve crop yields, and understand diseases at a molecular level. Key techniques in this field include chromatography, mass spectrometry, and DNA sequencing, which allow for detailed analysis of biological molecules.