Essentials of Molecular Biology, Fourth Edition focuses on the fundamental aspects of molecular structure and function by reviewing key features, and along the way, capsulizing them as a series of concise concepts. Thus, students are encouraged to place the essential knowledge of molecular biology into broad contexts and thereby develop both academic and personal meaning for this discipline. Essentials of Molecular Biologyis organized into a series of modules that provides instructors with an opportunity to scale the treatment of various topics up or down, depending on the level of the students and the overall curriculum format.