This book covers in detail some existent theories and innovative concepts revolving around molecular biology. The ever growing need of advanced technology is the reason that has fuelled the research in this field in recent times. Molecular biology refers to the study of molecular activity at the biological level. It encompasses the elements of biochemistry, biology, genetics and chemistry. It aims at examining the processes taking place in living organisms and at determining the roles and structure of biomolecules. This book explores all the important aspects of molecular biology in the present day scenario. Different approaches, evaluations, methodologies and advanced studies have been included in it. The text is appropriate for students seeking detailed information in this area as well as for experts.