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according to information from http://www.rothamsted.ac.uk/notebook/courses/guide/trans.htm " if the RNA polymerase attaches to a special sequence called a promoter, an additional small protein, the factor sigma, will also attach to the polymerase and lock it on the DNA. The factor 'sigma' will only attach itself to the complex DNA / RNA polymerase when the RNA polymerase is attached to a promoter. Another hypothesis is that the factor sigma attaches to RNApol anyway and the enzyme is then able to slide along the DNA until it finds a promoter. It prevents detaching and speeds up promoter location, and decreases the affinity of RNApol for general regions of DNA. " Therefore, the answer seems to be, RNA attaches to DNA through a small protein called the factor sigma once the RNA polymerase attaches itself to a chain sequence called a "promoter". according to information from http://www.rothamsted.ac.uk/notebook/courses/guide/trans.htm " if the RNA polymerase attaches to a special sequence called a promoter, an additional small protein, the factor sigma, will also attach to the polymerase and lock it on the DNA. The factor 'sigma' will only attach itself to the complex DNA / RNA polymerase when the RNA polymerase is attached to a promoter. Another hypothesis is that the factor sigma attaches to RNApol anyway and the enzyme is then able to slide along the DNA until it finds a promoter. It prevents detaching and speeds up promoter location, and decreases the affinity of RNApol for general regions of DNA. " Therefore, the answer seems to be, RNA attaches to DNA through a small protein called the factor sigma once the RNA polymerase attaches itself to a chain sequence called a "promoter". role of sigma
Actually RNA Polymerase can bind to DNA anywhere in the entire genome but sigma factor attaches to polymerase only when it is at promotor. sigma factor dissociates when polymerase crosses promotor. sigma factor stablises the pre initiatiation complex. Actually there are many promoter and many genes but which gene to be transcribed is decided by sigma factor.
What else can I help you with?
How would RNA polymerase be affected if the repressor protein were not bound to the proper site on a gene?
If the repressor protein is not bound to the proper site on a gene, it would not block the RNA polymerase from transcribing the gene. This would lead to the expression of the gene, as the RNA polymerase can then proceed with transcription.
Where does RNA polymerase bind?
RNA polymerase bind specific regions of DNA called promoters. The RNA polymerase holoenzyme is guided to promoters by interactions between members of the holoenyzme and specific DNA sequences such as the TATA box.
What enzyme transcribes DNA?
The enzyme that transcribes the DNA into RNA is called RNA polymerase.
What are the different types of RNA polymerases and their promoters?
There are three different types of RNA polymerases in eukaryotic cells: RNA polymerase I, II, and III. Each type is responsible for transcribing a specific set of genes. RNA polymerase I transcribes ribosomal RNA genes, RNA polymerase II transcribes protein-coding genes, and RNA polymerase III transcribes small structural RNA genes. The promoters for each type of RNA polymerase are different and contain specific sequences that are recognized by the polymerase to initiate transcription.
What is the significance of the 3 prime hydroxyl group in RNA synthesis?
The 3' prime hydroxyl group in RNA synthesis is important because it allows for the addition of new nucleotides during the formation of the RNA strand. This group provides a site for the attachment of the next nucleotide in the sequence, enabling the RNA polymerase enzyme to continue building the RNA molecule in the correct order.
How would RNA polymerase be affected if the repressor protein were not bound to the proper site on a gene?
If the repressor protein is not bound to the proper site on a gene, it would not block the RNA polymerase from transcribing the gene. This would lead to the expression of the gene, as the RNA polymerase can then proceed with transcription.
What genetic locus serves as a recognition site for RNA polymerase?
The promoter region, typically located upstream of the coding sequence, serves as the recognition site for RNA polymerase. It contains specific DNA sequences that allow RNA polymerase to bind and initiate transcription.
Where does RNA polymerase bind?
RNA polymerase bind specific regions of DNA called promoters. The RNA polymerase holoenzyme is guided to promoters by interactions between members of the holoenyzme and specific DNA sequences such as the TATA box.
What enzyme binds to DNA and is responsible for making a transcript RNA of DNA?
RNA polymerase is the enzyme responsible for binding to DNA and synthesizing a complementary RNA strand during transcription.
What enzyme transcribes DNA?
The enzyme that transcribes the DNA into RNA is called RNA polymerase.
What are the different types of RNA polymerases and their promoters?
There are three different types of RNA polymerases in eukaryotic cells: RNA polymerase I, II, and III. Each type is responsible for transcribing a specific set of genes. RNA polymerase I transcribes ribosomal RNA genes, RNA polymerase II transcribes protein-coding genes, and RNA polymerase III transcribes small structural RNA genes. The promoters for each type of RNA polymerase are different and contain specific sequences that are recognized by the polymerase to initiate transcription.
What is the name of the enzyme that creates mRNA?
RNA polymerase is the enzyme that makes mRNA from a strand of DNA.
Where does RNA polymerase blind?
The RNA polymerase binds to the promoter. RNA stands for ribonucleic acid.
Is the enzyme that allows replication to occur DNA polymerase or RNA polymerase?
DNA polymerase replicated DNA. RNA polymerase creates mRNA to be used in protein synthesis. RNA polymerase does not replicated DNA.
What is the significance of the 3 prime hydroxyl group in RNA synthesis?
The 3' prime hydroxyl group in RNA synthesis is important because it allows for the addition of new nucleotides during the formation of the RNA strand. This group provides a site for the attachment of the next nucleotide in the sequence, enabling the RNA polymerase enzyme to continue building the RNA molecule in the correct order.
What enzymes catalyzes the linking together of RNA nucleotides to form RNA a RNA polymerase b tRNA c ribozyme d reverse transcriptase e RNA ligase?
rna polymerase
Examples of a molecule in your body that can affect transcription factors?
A repressor, which works by binding to the operator and blocking the attachment of RNA polymerase to the promoter.
