Cell biology is the branch of biology concerned with the examination of the structure and function of cells. It delves into various facets of the cell, including its physiological properties, signaling pathways, metabolic processes, and life cycle. Furthermore, it examines the chemical composition of cells and their interactions with the environment. Research in cell biology is conducted at both microscopic and molecular levels. Cells studied in cell biology are broadly categorized as either prokaryotic or eukaryotic. Prokaryotic cells lack a membrane-bound nucleus, whereas eukaryotic cells possess both a membrane-bound nucleus and membrane-bound organelles. Cell biology significantly contributes to the diagnosis and treatment of various diseases, including cancer. The study of cell biology is closely intertwined with fields such as cytochemistry, immunology, genetics, molecular biology, and biochemistry. The topics included in this book on cell biology are of utmost significance and bound to provide incredible insights to readers. It includes topics that deal with the basic to the most complex concepts and approaches of this area. It will serve as a valuable source of reference for graduate and postgraduate students.