How many types of RNA polymerase are in prokaryotes?
Prokaryotes utilize one RNA polymerase for all transcription of types of RNA. In contrast, eukaryotes utilize three slightly different RNA polymerases: RNA polymerase I, RNA polymerase II, and RNA polymerase III (8). Each of the three RNA polymerases in eukaryotes is responsible for transcribing a unique type of RNA.
How many types of RNA polymerase are present write their functions?
There are 5 known types of RNA polymerases each responsible for the synthesis of specific subtypes of RNA.
How many different types of RNA polymerases are in eukaryotes?
three
What’s the role of RNA polymerase?
RNA polymerase is an enzyme that is responsible for copying a DNA sequence into an RNA sequence, duyring the process of transcription. For example, all species require a mechanism by which transcription can be regulated in order to achieve spatial and temporal changes in gene expression.
What is the role of RNA polymerase II?
RNA polymerase II (Pol II) is the central enzyme that catalyses DNA-directed mRNA synthesis during the transcription of protein-coding genes.
What is the function of polymerase II?
Eukaryotic RNA polymerase II (pol II) is a 12-subunit DNA-dependent RNA polymerase that is responsible for transcribing nuclear genes encoding messenger RNAs and several small nuclear RNAs (1).
What happens if DNA polymerase makes a mistake?
When Replication Errors Become Mutations. Incorrectly paired nucleotides that still remain following mismatch repair become permanent mutations after the next cell division. This is because once such mistakes are established, the cell no longer recognizes them as errors.
Why does replication fork have two polymerases?
There are two molecules of DNA polymerase III at a replication fork, each of them hard at work on one of the two new DNA strands. This strand is made continuously, because the DNA polymerase is moving in the same direction as the replication fork.