Abstract

The cell is the basic structural and functional unit of all living organisms. Information governing cellular activity is stored in the nucleus of the cells. In all organisms, except in few viruses, the hereditary material is the deoxyribonucleic acid (DNA). In this chapter, a brief introduction to the building blocks of DNA and its structures is given. Many experiments that prove that DNA is the genetic material are discussed. Structures of prokaryotic and eukaryotic genes and genomes are also dealt with.

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