The branch of biology that deals with the study of the structure and function of the cell is known as cell biology. It is involved in the study of various aspects of the cell such as its physiological properties, signaling pathways, metabolic processes and life cycle. It also studies the chemical composition and interactions of the cell with their environment. Research in this field is conducted at both microscopic and molecular levels. The cells which are studied in cell biology are broadly classified as either prokaryotic or eukaryotic. Prokaryotic cells do not have a membrane bound nucleus while eukaryotic cells have a membrane bound nucleus as well as membrane bound organelles. Cell biology plays an important role in the diagnosis and treatment of many diseases such as cancer. The study in cell biology is closely related to the fields of genetics, molecular biology, immunology, biochemistry and cytochemistry. The book aims to shed light on some of the unexplored aspects of cell biology. Different approaches, evaluations and concepts related to this field have been included herein. This textbook aims to serve as a resource guide for students and experts alike and contribute to the growth of the discipline.