The field of biochemistry aims to study the chemical processes taking place in living organisms on a cellular level. The chapters included in this book are a compilation of updated information on structure and interaction of proteins and nucleic acids, structure of cells, applied biochemistry, molecular biology, etc. Some of the core concepts of biochemistry like functions of biomolecules and metabolic processes have been explained in this book. It aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.