Which direction is the RNA polymerase moving in Model 1?
Just so, what protein does the regulatory gene in Model 1 produce?
The regulatory gene lacI produces an mRNA that produces a Lac repressor protein, which can bind to the operator of the lac operon. In some texts, the lacI regulatory gene is called the lacI regulator gene. Regulatory genes are not necessarily close to the operons they affect.
Additionally, how does the change identified in Part A allow transcription of the genes in the operon to occur? The repressor protein binds to the operator site. The repressor protein changes shape. How does the change identified in part A allow transcription of the genes in operon to occur? The repressor protein no longer binds to the operator and is no longer blocking RNA polymerase, so transcription can occur.
Regarding this, which way does RNA move?
RNA polymerase synthesizes an RNA transcript complementary to the DNA template strand in the 5' to 3' direction. It moves forward along the template strand in the 3' to 5' direction, opening the DNA double helix as it goes.
How is gene expression controlled in prokaryotes quizlet?
Transcription, translation or post-translation. Negative control occurs when a regulatory protein prevents transcription. Positive control occurs when a regulatory protein increases the transcription rate.