This sixth edition contains the recent advances in molecular basis of life. Includes illustrations, formulas, and worked-out examples and solutions to assist those interested in knowing how nature and human life work at the molecular level. New interactions (special topics) consist of: scurvy, lime juice, ascorbic acid, and the scientific method, air bags, melatonin - hope or hype?, mad cows, prions, and protein shapes, biochips, breast cancer, and the no-name protein and more. Each chapter provides a summary as well as review exercises.