This book is divided into five chapters, which is further divided into sub topics along with their diagrams which will help readers to understand about the basics of structural organization of plasma membrane, transport across membrane, cytoskeleton (microtubules and microfilaments structure) cell-cell signalling, genome organization, basic idea of sex determination, elementary knowledge of human genome project, hormonal regulation of gene expression, transcription factors, steroid receptors, analysis of gene expression along with general idea of genetic diseases and newly devoloping branch of genetics that deals with gene library and short of the idea of transgenic animals. Along with the ideas of molecular cell biology and genetics readers will get the practical knowledge of the topics that have been covered.