Molecular biology studies those activities of cellular molecules, such as proteins and nucleic acids, which are essential for cell maintenance and cell functioning. The mapping of transfer of biological sequential information is the central concern of this field. Molecular cloning, DNA copying through polymerase chain reaction (PCR), molecular blotting and probing, the preparation of microarrays are some of the modern applications of molecular biology. Some of the diverse topics covered in this book address the varied branches that fall under this category. Most of the topics introduced herein cover new techniques and applications of this field. For all those who are interested in molecular biology, this book can prove to be an essential guide.