Cell biology discusses the structure and composition cells. DNA damage and replication, cell division and the cell cycle are some of the significant aspects studied under this field. It involves a microscopic as well as molecular study of both prokaryotic and eukaryotic cells. It is an important field which facilitates advancements of related branches like biochemistry, evolution, genetics, nanotechnology, etc. This book explores all the important aspects of cell biology in the present day scenario. It will serve as a valuable source of reference for graduate and post-graduate students.