Fundamentals of Cellular and Molecular Biology is a comprehensive textbook designed to explain the molecular mechanisms that underpin the functions and structures within living organisms. This resource focuses on improving the reader’s understanding and exploration of the cellular and molecular basis of life, emphasizing the latest research findings and technological advancements. The book is structured into 18 chapters that systematically cover topics ranging from the basic structural components of cells to the complex processes of gene expression, protein synthesis, and cell signaling. It offers a detailed examination of DNA replication, repair mechanisms, and the molecular basis of genetic diseases. Additionally, the book explains the application of molecular biology in biotechnology, medicine, and environmental science, as well as advanced topics like cloning, gene therapy, and molecular diagnostics.