What does the core part of RNA polymerase do?
At the heart of all polymerase enzymes is a set of subunits called the core enzyme. The core enzyme of RNA polymerase is catalytically active, which is responsible for the polymerization.
What are the steps of bacterial transcription?
The process occurs in three main steps: initiation, elongation, and termination; and the end result is a strand of mRNA that is complementary to a single strand of DNA. Generally, the transcribed region accounts for more than one gene.
During which stage of bacterial transcription is the subunit of RNA polymerase involved?
During which stage of bacterial transcription is the σ subunit of the RNA polymerase involved? Answer a. The σ subunit of the RNA polymerase involved in initiation.
What is core enzyme in transcription?
A core enzyme consists of the subunits of an enzyme that are needed for catalytic activity, as in the core enzyme RNA polymerase. An example of a core enzyme is a RNA polymerase enzyme without the sigma factor (σ). This enzyme consists of only two alpha (2α), one beta (β), one beta prime (β’) and one omega (ω).
What role does RNA polymerase play in transcription of mRNA?
RNA polymerase is the main transcription enzyme. 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.
What is the process of RNA transcription?
Transcription is the process by which the information in a strand of DNA is copied into a new molecule of messenger RNA (mRNA). DNA safely and stably stores genetic material in the nuclei of cells as a reference, or template.
What happens to RNA polymerase after transcription?
What happens to RNA polymerase II after it has completed transcription of a gene? The enzyme is free to transcribe other genes in the cell. RNA polymerase releases the completed RNA and detaches from the DNA.
What is the TATA box in transcription?
A TATA box is a DNA sequence that indicates where a genetic sequence can be read and decoded. It is a type of promoter sequence, which specifies to other molecules where transcription begins. The TATA box is able to define the direction of transcription and also indicates the DNA strand to be read.