The aim of this book is to present the subject of Biotechnology to the undergraduate B.Sc. IInd Year students of Biotechnology, M.P. Universities and students of various other Universities. This book provides an accurate and understandable matter on Biotechnology. The diagrams are especially designed for clarity and simplicity. It is comparable at international level and fully based on scientific research and teaching. Thus, in this book many topics which are not easily available have been incorporated for the convenience of the students.