What happens to the RNA polymerase if a repressor protein attaches to the operator?
When the repressor binds to the operator, it prevents RNA polymerase from binding to the promoter and/or transcribing the operon. When the repressor is bound to the operator, no transcription occurs and no mRNA is made. Some regulatory proteins are activators.
What does RNA polymerase do during transcription?
RNA polymerase (green) synthesizes RNA by following a strand of DNA. RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription.
How would RNA polymerase be affected if the repressor protein were not bound to the proper site on a gene?
In absence of repressor protein RNA polymerase will attach to DNA and corresponding RNA molecule will be formed.
What happens when the RNA polymerase binds to the promoter of a gene?
Transcription begins when RNA polymerase binds to a promoter sequence near the beginning of a gene (directly or through helper proteins). RNA polymerase uses one of the DNA strands (the template strand) as a template to make a new, complementary RNA molecule. Transcription ends in a process called termination.
Which type of RNA is responsible for translation of mRNA?
Transfer RNA (tRNA)
Does RNA copy instructions from DNA?
The majority of genes carried in a cell’s DNA specify the amino acid sequence of proteins; the RNA molecules that are copied from these genes (which ultimately direct the synthesis of proteins) are called messenger RNA (mRNA) molecules. The final product of a minority of genes, however, is the RNA itself.
What is the process from DNA to RNA to protein?
The Central Dogma of Molecular Biology states that DNA makes RNA makes proteins (Figure 1). The process by which DNA is copied to RNA is called transcription, and that by which RNA is used to produce proteins is called translation.
How does DNA go to RNA to protein?
In the first step, the information in DNA is transferred to a messenger RNA (mRNA) molecule by way of a process called transcription. The pre-mRNA is processed to form a mature mRNA molecule that can be translated to build the protein molecule (polypeptide) encoded by the original gene.
Which type of RNA has an Anticodon?
transfer RNA (tRNA)