Molecular Biology is the field of life science that studies biological processes essential for the cell's functions and maintenance such as replication, transcription, and translation. This field has a profound impact on life science investigation. Major developments in molecular biology over the last four decades have revolutionized life science. Innovation in next-generation sequencing, CRISPR/Cas, epigenetics, meganucleases, genome editing, and recombinant DNA technology, which made it possible to divulge the high complexity of the genome and reveal the precise mechanisms for the transmission of the genetic information. So, it is now established that gene expression, DNA replication, and DNA repair are processes much more intricate than formerly assumed. This complexity includes, but is not limited to: the presence of interconnected regulatory pathways involving also previously unforeseen actors, such as non-coding RNA; the importance of epigenetic mechanisms and post-transcriptional modifications; the importance of the correct execution, timing, sequentially and coordination of all cell cycle events; the pleiotropic functions of players operating in these processes; and the influence of the energetic metabolisms and environmental signals. Given the speedily changing and continuously evolving nature of the molecular biology field, this book is an attempt to give updated information about molecular processes. The molecular biology textbook describes important concepts of replication, DNA damage, and repair, transcription, translation, regulation of gene expression, and molecular techniques systematically. Numerous books are available on molecular biology but there was a scarcity of books that generate a quest to learn the subject. Emphasis has been laid to start every topic with a basic question that comes to the mind of students. For more information you can visit http://ifasonline.com/