This text summarizes the most important concepts of biochemistry for medical students. Each chapter contains study questions designed to test and reinforce students knowledge of the concepts. Answers to the questions, with appropriate explanations, are provided at the end of each chapter. The fifth edition has been revised to reflect the most current concepts and approach to the study of biochemistry. It aims to present key material in easy-to-digest segments, set off in logical sections and also contains plenty of space for note-taking.