Chapter 16 Regulation principles and How genes are regulated in bacteria Chapter 17 Basic mechanism of gene expression in eukaryotes Chapter 18 The mechanism of rnai and the role of miRNA in development and cancergenesis5 Chapter 16 Regulation principles and How genes are regulated in bacteria Chapter 17 Basic mechanism of gene expression in eukaryotes Chapter 18 The mechanism of RNAi and the role of miRNA in development and cancergenesis