What process is central to the initiation of transcription in bacteria?
What process is central to the initiation of transcription in bacteria?
Which of the following processes is central to the initiation of transcription? The answer is: binding of sigma to the promoter region. The start codon is the same for prokaryotes and eukaryotes.
What are the steps of initiation of transcription?
Transcription takes place in three steps: initiation, elongation, and termination. The steps are illustrated in Figure 2. Initiation is the beginning of transcription. It occurs when the enzyme RNA polymerase binds to a region of a gene called the promoter.
What are the three stages of transcription initiation?
Transcription takes place in three steps: initiation, elongation, and termination.
What is the first step in bacterial transcription?
The first step in transcription is initiation, when the RNA pol binds to the DNA upstream (5′) of the gene at a specialized sequence called a promoter (Figure 2a). In bacteria, promoters are usually composed of three sequence elements, whereas in eukaryotes, there are as many as seven elements.
Which of the following is required for the initiation of transcription?
Explanation: The sigma factor is solely required for the initiation of transcription. In fact, the sigma subunit will often fall off of the enzyme during the elongation phase of transcription. Binding of the sigma factor is an important signal for transcription to begin.
Which of the following is involved with initiation of transcription?
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.
What happens in initiation of translation?
Initiation of translation occurs when mRNA, tRNA, and an amino acid meet up inside the ribosome. Once translation has begun, it continues down the line as mRNA shifts along through the ribosome. Each new codon matches with a new tRNA anticodon, bringing in a new amino acid to lengthen the chain.
What is the initiation factor of transcription?
Transcription initiation factors (TFII) are proteins which enable RNA polymerase II to bind to the DNA template in order to start the transcription process. TFIIA is one of several TFs which are required for transcription.
