Biotechnology is an interdisciplinary research area that includes biology, chemistry, and engineering principles to solve global challenges in health, agriculture, and sustainability. A Textbook of Biotechnology offers a structured, curriculum-aligned guide for students and researchers, blending fundamentals with advanced concepts. Covering topics from basic biotechnology, molecular biology to genomics and cell dynamics, it features clear explanations, diagrams, and review questions for preparation of CBSE class XI Biotechnology (045) and NEET examination. Designed to inspire future innovators, this book balances theory and application, making complex ideas accessible.