Cell is the fundamental building block of all the existing life forms. Conducting studies related to cells and its various functions and activities are crucial for understanding all the essential life sustaining processes. Cell biology tries to explain the structure, physiological properties, metabolic processes, signaling pathways and life cycles, and other processes of the cells. Molecular biology studies the interaction of biomolecules with different systems of the cell including proteins, DNA, RNA and their synthesis. It is a sub-field of cell biology. This book traces the progress of this field and highlights some of its key concepts and applications. The topics covered in this extensive book deal with the core topics related this area of study. It unfolds the innovative aspects of cell biology which will be crucial for the progress of this field in the future. It aims to assist cell biologists, molecular biologists, researchers and students associated with this field.