Gene Expresslon O FIGURE 7.10 The Process of RNA Synthesis Bacterial RNA polymerases have a sigma subunit that allows them to recognize a promoter (as illustrated); the RNA polymerases of eukaryotic cells and archaea use Transcription transcription factors to recognize promoters. ? Which component of the bacterial RNA polymerase recognizes the promoter? Translation 5' 3' 3' 5' Promoter Terminator RNA polymerase 1 Initiation RNA polymerase binds to the promoter and melts a short stretch of DNA. 5' 3' 3' 5' Template strand Sigma 2 Elongation Sigma factor dissociates from RNA polymerase, leaving the core enzyme to complete transcription. RNÁ is synthesized in the 5' to 3' direction as the enzyme adds nucleotides to the 3 end of the growing chain. 5' 3' 5' Promoter RNA ETGAS Termination When RNA polymerase encounters a terminator, it falls off the template and releases the newly synthesized RNA. 5' 3' 3" 5' Promoter RNA polymerase dissociates from template.
Bacterial Genomics
The study of the morphological, physiological, and evolutionary aspects of the bacterial genome is referred to as bacterial genomics. This subdisciplinary field aids in understanding how genes are assembled into genomes. Further, bacterial or microbial genomics has helped researchers in understanding the pathogenicity of bacteria and other microbes.
Transformation Experiment in Bacteria
In the discovery of genetic material, the experiment conducted by Frederick Griffith on Streptococcus pneumonia proved to be a stepping stone.
Plasmids and Vectors
The DNA molecule that exists in a circular shape and is smaller in size which is capable of its replication is called Plasmids. In other words, it is called extra-chromosomal plasmid DNA. Vectors are the molecule which is capable of carrying genetic material which can be transferred into another cell and further carry out replication and expression. Plasmids can act as vectors.
Which component of the bacterial RNA polymerase recognizes the promoter?


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