$4.00 Molecular Genetics Unit Lesson 1: DNA: The Genetic Material Lesson 2: Replication of DNA Lesson 3: DNA, RNA, Protein Lesson 4: Gene Regulation and Mutation Some of the topics covered the scientists behind the discovery of DNA, the enzymes that replicate DNA, okazaki fragments, types of RNA, synthesis of RNA, and translation, operons, mutations, and mutagens.