This book is written expansively to meet the curriculum requirements of Pharmacy, Biotech and biomedical engineering and life science, veterinary students. This Book is written with color illustrations, headings, sub headings, tables and flow charts for better understanding, easy reproducibility of the subject. The language and contents of this book are made so simple and easy for understanding. It provides latest and wide information for students and it is a good book for those who interested in more advanced research in the field of biotechnology, and a true guide for beginners to practice and establish advanced research in this field.