Biochemical systems refer to the complex networks of biological molecules that interact within living organisms. These systems include proteins, nucleic acids, lipids, and carbohydrates, which work together to perform essential functions such as metabolism, signaling, and cellular structure. Understanding these interactions helps scientists explore how life operates at a molecular level. In biochemical systems, enzymes play a crucial role as catalysts, speeding up chemical reactions necessary for life. Additionally, biochemical pathways, such as the Krebs cycle and glycolysis, illustrate how energy is produced and utilized in cells. Studying these systems is vital for advancements in fields like medicine and biotechnology.