potential new risk from mobile phones. it is the masure problemof todays world. this book has all the possible reason and pathways relating to cancer due to radiation. it has a field project with discussion on brain cancer due to radiation. the main aim of this book is to make people aware about hazardous effects of different radiations where they are living so that they can prevent themselves from these radiation. it has also dealt with the various mechanism by which people can save themselves from these hazardous radiations. in todays world cancer is a big problem so people should know how they can prevent from it. in short this book provide a large idea to readers in brief explanation about how and what type of radiation and up to what extent can effects living beings. this book has dealt mainly on signal transduction and various enzymes like protein kinases in relation to regulation and cancer. radiation cause cancerby disturbing cell signalling.