This is the fourth book which I have put forth with utmost hard work and in depth coverage. This book has been ideated to help the students understand the basic concepts of Molecular Biology and Bio- techniques. This book is written mostly from the viewpoint of the basic scientist who works at the cellular and molecular level. As molecular biology is one of the fore front subjects in research and development these days, it has become almost necessary for the students to have a hold on this subject. Coupled with the molecular biology are the bio-techniques employed in every walk of research. A student aspiring to be a researcher needs to have a fair knowledge of the basic lab techniques used in R&D. Written in lucid language so as to be easy for the beginners reading these two subjects for the first time, it comprises of two units, each of which have been written according to the needs of the student at the primary level.