Biotechnology – A Problem Approach is a comprehensive textbook that covers fundamental concepts, methodologies, and applications in biotechnology. This book offers a well-rounded introduction to key areas of the subject, including Biomolecules and Catalysis, Bioenergetics and Metabolism, Cell Structure and Functions, Immunology, Genetics, Bioinformatics, and Bioprocess Engineering. The chapters are thoughtfully selected to provide a focused yet comprehensive overview without overwhelming readers with excessive detail. The content is enhanced with clear explanations supported by flow charts, figures, and tables, facilitating easy and compelling learning. Self-tests and questions at the end of each chapter help readers assess their understanding and reinforce key concepts. Designed for BSc and MSc Biotechnology students, as well as those preparing for GATE Biotechnology and DBT-JRF exams, this book serves as a valuable resource for a deep understanding of biotechnology principles.