Molecular biology is a biological branch that is concerned with the molecular aspects of biological activity that occurs between biomolecules within a cell. It observes and regulates the interactions between proteins, DNA, RNA and their biosynthesis. In molecular biology specific techniques are combined with the techniques and concepts from genetics and biochemistry. It is the study of molecular basis of various processes including replication, translation, transcription and cell function. Some of the common techniques of this domain include molecular cloning, gel electrophoresis: macromolecule blotting. This book presents the complex subject of molecular biology in the most comprehensible and easy to understand language. The topics covered in this extensive book deal with the core subjects of this biological field. This book will prove to be immensely beneficial to students and experts in this field.