The book is ideally cut out for the Undergraduate and Postgraduate students of Physiology (General Science), Medical Science, Veterinary Science, Biochemistry, Biophysics, Genetics, Applied Biology etc. It is equally helpful for examinations. In this book Molecular Biology has been discussed vis-a-vis Biochemistry and structural formula of DNA and RNA, their biological role, mechanism of transmission of heredity, replication, gene expression, protein biosynthesis, etc. A separate chapter on Genetic Engineering with recent clinical developments has been included in the text. Another chapter on Forensic Medicine, i.e. DNA fingerprint technology, Gene therapy, Human genome project, Human cell cloning in therapeutic, individual genetic diversity and determination (ROMA), has also been incorporated for the students to cope up with all the recent developments.