In this article we will discuss about:- 1. The Inducible and Repressible Systems 2. Transcriptional and Translational Control 3. Regulation of E.coli Tryptophan Operon 4. Regulation of Transcription in Eukaryotes 5. Promoters and Enhancers 6. Transcriptional Activators 7. Regulation by Alternative Splicing of RNA Transcript 8. Regulation at the Level of Translation 9. Epigenetic Control of Genetic Regulation. The Inducible [...]
In this article we will discuss about the genetics of viruses. History of Viruses: Viruses were first discovered in 1899 when M. W. Beijerinck noticed the existence of microorganisms invisible in the microscope, that could pass through filters that stopped bacteria. In 1917 Felix d'Herelle gave the name bacteriophage (meaning eater of bacteria) to one such microbe that was parasitic [...]
In this article we will discuss about the genetic map of E.coli. Several methods have revealed that the genetic map of the main chromosome of E. coli is an un-branched circle with a circumference of 100 minutes (Fig. 17.5) which corresponds to the transfer time during conjugation. About 650 genes have been mapped. Some important features of the genetic map [...]