Biochemistry is the study of the chemical substances and processes that occur in living organisms. It combines biology and chemistry to explain how molecules like proteins, carbohydrates, lipids, and nucleic acids work together to sustain life. The course focuses on topics such as enzyme function, metabolism, and genetic information flow, helping students understand how cellular reactions support growth, energy production, and overall body function. It forms a key foundation for careers in medicine, pharmacy, and biotechnology.