Biochemistry stands at the fascinating intersection of biology and chemistry, providing insights into the molecular basis of life. The subject explores the structure, composition, and functions of biomolecules, while also explaining the metabolic pathways that sustain cellular processes. For students of life sciences, medicine, and allied disciplines, a foundational understanding of biochemistry is essential to appreciate how living organisms function at the molecular level.
This book, “Introduction to Biochemistry”, has been designed to present the core concepts of the subject in a clear, systematic, and student-friendly manner. The chapters are organized to provide a gradual progression from basic principles to more complex processes, ensuring that learners can build a strong conceptual foundation.

The book covers the classification, structure, properties, and metabolism of carbohydrates, lipids, proteins, and nucleic acids, along with their biological significance. Emphasis has been placed on the biochemical pathways such as glycolysis, the Krebs cycle, electron transport chain, lipid oxidation, amino acid catabolism, enzyme mechanisms, and nucleic acid replication, transcription, and translation. Special attention has been given to explaining the biological importance of biomolecules and their role in health and disease. This not only strengthens theoretical understanding but also enhances the practical relevance of biochemistry in medical, agricultural, and biotechnological fields.

The primary objective of this book is to serve as a comprehensive yet concise textbook for undergraduate students of biochemistry, life sciences, and related courses. It may also serve as a useful reference for postgraduate students who wish to revisit the fundamental aspects of the subject.

I sincerely hope that this book will spark curiosity, deepen understanding, and inspire students to explore the biochemical basis of life with enthusiasm.