The study of the different structures and functions of the cell falls under the discipline of cell biology. It explains the organization of cell organelles, their physiological properties, signaling pathways, metabolic processes and interactions with the environment. The studies are done on a microscopic and molecular level. It encompasses the study of both prokaryotic and eukaryotic cells. Various technological implements are employed, such as optical microscopy, electron microscopy, scanning electron microscopy and fluorescence microscopy, besides many others. Cell culture, immunostaining, computational genomics, etc. are some of the different methods used in cell biology studies. This book contains some path-breaking studies in the field of cell biology. It traces the progress of this field and highlights some of its key concepts and applications. It will provide comprehensive knowledge to the readers.