, or Deoxyribonucleic Acid, is described, in Encarta Encyclopedia as a genetic material of all cellular organisms and most viruses. carries the information needed to direct protein synthesis and replication. Protein synthesis is the production of the proteins needed by the cell or virus for its activities and development. Replication is the process by which copies itself for each descendant cell or virus, passing on the information needed for protein synthesis. In most cellular organisms, is organized on chromosomes located in the nucleus o ....