Biochemistry is a branch of science that focuses on the study of the chemical processes and substances that occur within living organisms. It involves understanding the structure, function, and regulation of biomolecules such as proteins, nucleic acids, carbohydrates, and lipids. Biochemists study how these molecules interact and contribute to essential biological processes such as metabolism, growth, and reproduction. This field is crucial for advancements in medicine, agriculture, and biotechnology, as it provides insights into the molecular mechanisms underlying health, disease, and other biological phenomena.