Researchers from a number of disciplines have made valuable contributions to our current understandings of carcinogenesis, at the same time developing an extensive and 'rich' vocabulary to describe repair and mutagenesis.This book highlights the basic process and understanding of the molecular basis of carcinogenesis with special emphasis on chemical carcinogenesis.The role of various genes in the induction of cancer is also explained.This book will be helpful for teachers,researchers and students and help them in better understanding of the subject.