Principles of Cell and Molecular Biology was developed to be a readable story that is accessible and interesting for all introductory students. The authors provide a balanced treatment of both classical cell biology and modern molecular biology issues. Students are further presented with historical and experimental approaches to explain the evolution of models and ideas, and to provide actual data for each concept. By first introducing the fundamental principles that guide cellular organization and function, students develop an understanding of concept development. The text supports these principles by providing the crucial scientific evidence that led to the formulation of these central concepts. Finally, this synthesis of new and classic coverage is achieved within a size and style that is easy to read and comprehend by all students. The second edition has been revised to update all scientific content and references, and care was taken during revision to fine tune the writing style. Also new to this edition is a completely revised, full color art program, a glossary of key terms, chapter-opening "Sentence Headings" that provide an overview of the concepts to be discussed, and chapter-ending "Summary of Principal Points" sections that provide an outline of the important material covered in the chapter.