In this article we will discuss about the characters of different groups of prokaryotes. Domain: Archaea: The important characters of Domain Archaea (Gr. archaios, ancient) are: Important Characters of Archaea: 1. Members of the Domain Archaea i.e., Archebacteria can live in different habitats like. i. Extreme acidic and hot (above 100°C) environment, ii. Extreme saline condition, and iii. In anaerobic [...]
The below mentioned article provides a study note on the transcription in prokaryotes. In prokaryotic organisms, transcription occurs in three phases known as initiation, elongation and termination with the help of single RNA polymerase. RNA Polymerase: RNA is synthesized by a single RNA polymerase enzyme which contains multiple polypeptide subunits. In E. coli, the RNA polymerase has five subunits: two [...]
In this article we will discuss about the Transcriptional and Post-Transcriptional Regulation in Prokaryotes. Transcriptional Regulation of Gene Expression in Prokaryotes: Gene transcription is regulated in bacteria through a complex of genes termed operon. These are transcriptional units in which several genes, with related functions, are regulated together. Other genes also occur in operons which encode regulatory proteins that control [...]