Cellular biology focuses on the different functions and structures of cells. Molecular biology studies biological activity at a molecular level. Some of the techniques used in molecular biology are molecular cloning, gel electrophoresis, polymerase chain reaction, microarrays, etc. The recent discoveries in the field of molecular and cellular biology have made major contributions to medical research and drug development. This book is a compilation of chapters that discuss the most vital concepts and emerging trends in the field of molecular and cellular biology. A number of latest researches have been included to keep the readers up-to-date with the global concepts in this area of study.