Do prokaryotes regulate gene expression with a promoter?
Just so, how do prokaryotes regulate gene expression?
Prokaryotic cells can only regulate gene expression by controlling the amount of transcription. It therefore became possible to control gene expression by regulating transcription in the nucleus, and also by controlling the RNA levels and protein translation present outside the nucleus.
Also Know, what is an operator in prokaryotic gene expression? A repressor is a transcription factor that suppresses transcription of a gene in response to an external stimulus by binding to a DNA sequence within the regulatory region called the operator, which is located between the RNA polymerase binding site of the promoter and the transcriptional start site of the first
Also to know, how is an operator different from a promoter in the regulation of prokaryotic gene expression?
An operon is basically a group of genes all under control of one promoter. The promoter is the sequence where the RNA polymerase binds and begins transcription. It is upstream of the sequence encoding the protein. An operator is a regulatory sequence that a repressor can bind to.
How does the operator region of DNA regulate gene expression?
The promoter is found in the DNA of the operon, upstream of (before) the genes. Some regulatory proteins are repressors that bind to pieces of DNA called operators. When bound to its operator, a repressor reduces transcription (e.g., by blocking RNA polymerase from moving forward on the DNA).