Technology is the boon of modern times. The expansion of molecular cloning technology in the late 20th century created an uprising in the biological and biomedical sciences that extends till today. This book supplies the reader with a viewpoint on how extensive the functions of molecular cloning have become. The data in this book is arranged in sections based on functions, and range from cancer biology and immunology to plant and evolutionary biology. This book even covers a broad variety of technological techniques such as situational cloning and exceptional tools for recombinant protein appearance. This book intends to provide some useful information for students and experts.