A graduate student is trying to create a more efficient in vitro transcription system. The students idea is to covalently attached the sigma factor to RNA Polymerase so that the complex will be more efficient at binding promoter. Is this a good idead?

A graduate student is trying to create a more efficient in vitro transcription system. The students idea is to covalently attached the sigma factor to RNA Polymerase so that the complex will be more efficient at binding promoter. Is this a good idead?

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Description: A graduate student is trying to create a more efficient in vitro transcription system. The students idea is to covalently attached the sigma factor to RNA Polymerase so that the complex will be more efficient at binding promoter. Is this a good idead

Biology Today and Tomorrow without Physiology (MindTap Course List)

5th Edition

ISBN:9781305117396

Author:Cecie Starr, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Christine Evers, Lisa Starr

Chapter7: Gene Expression And Control

Section: Chapter Questions

Problem 4CT

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Consider this list (below) of steps involved in transcription. These steps are out of order. TRANSCRIPTION: 1. mRNA travels through a nuclear pore and enters the cytoplasm 2. the mRNA polymerase attaches at the start of a specific gene 3. RNA polymerase reads the gene surface4. a transcription factor bonds to a promoter site5. DNA molecule is unwound 6. a complimentary mRNA is produced What is the correct order of this transcription?
The diagram below depicts an active transcription bubble after a short period of RNA synthesis during the transcription process of a prokaryotic gene. Redraw the diagram and label parts (i) to (v) on the diagram. Motivate your answers. (i) the template and the non-template strands; (ii) the orientation (direction) of both DNA strands and that of the newly synthesised RNA strand; (iii) the location of a possible promotor sequence; (iv) the location of a possible Shine-Dalgarno sequence; (v) the specific area of activity of a RNA polymerase.
Once an RNA polymerase has initiated transcription, it will release the sigma factor or sigma subunit and bind other proteins known as elongation factors before it begins moving down the DNA template doing strand elongation. Briefly explain why this is necessary - why can't RNA polymerase + sigma factor do all of transcription? Be specific.
Consider the Rho-dependent terminator sequence 5’CCCAGCCCGCCUAAUGAGCGGCCUUUUUUUU-3’. What affect would a point mutation at any one of the bolded and underlined nucleotides disrupt termination of transcription? Group of answer choices 1.Mutation in one of these nucleotides would disrupt base pairing, but not affect the formation of the hairpin and termination proceeds. 2.Mutation in one of these nucleotides would have no affect on base pairing, so the termination hairpin is formed and termination proceeds. 3.Mutation in one of these nucleotides would not disrupt base pairing, but would prevent the formation of the hairpin and disrupt termination. 4.Mutation in one of these nucleotides would disrupt base pairing, preventing the formation of the hairpin and disrupting termination.
Listed below are steps in the transcription process. Reorganize the list so the steps in the correct order- starting with the first step in initiating transcription and ending with completion of a new strand of RNA (in other words- from start to finish of transcription). RNA polymerase reaches the termination signal DNA unwinds underneath RNA polymerase at transcription start site RNA polymerase is recruited to the promoter region mRNA transcript is released General Transcription factors bind TATA box (and other DNA sequences) in the promoter region General Transcription Factors unbind from promoter region mRNA transcript synthesis occurs RNA polymerase moves along the template strand in the 3’ to 5’ direction
5 5 S 6 5 5 5 6 U 6 U 6 5:14 PM | 0.2KB/s HHHHH R R U RUUR ARU AP AP R U U R R AP R R R AP MOLECULAR...GENETICS. Describe gene regulation at transcription level. Explain the role of antsense RNA in control mechanism. Describe translational control mechanisms. Describe common DNA damages. Distinguish excision and mismatch repair. Describe the role of recA protein in recombination repair Elaborate on SOS repair mechanism. Define thymine dimer. How are they formed and repaired? Describe the molecular basis of mutation. 11 Leu+ Met+ Arg+ Write a detailed note on spontaneous mutation. Explain about mutant detection methods. Define reverse mutation. Describe the mechanism underlying Intragenic and intergenic suppressor mutations Describe the transposition mechanisms. 13 Vo LTE UNIT IV Time (Min) Describe the process of generalised transformation occurring in bacterial chromosome and plasmid. Elaborate on molecular mechanism and significance of transformation 22 Describe the process of…
The following diagram represents a transcription unit on a DNA molecule. a. Assume that this DNA molecule is from a bacterial cell. Draw the approximate locations of the promoter and terminator for this transcription unit. b. Assume that this DNA molecule is from a eukaryotic cell. Draw the approximate location of an RNA polymerase II promoter.
A particular mutation in the bacterial sigma factor allows this protein to bind RNA polymerase but prevents it from coming off (detaching) RNA polymerase once it binds. What specific effect will this mutation have on transcription? It will prevent the transcription termination exerted by the Rho protein. It will prevent the formation of closed complexes between RNA polymerase and the promoter. It will prevent the formation of open complexes between RNA polymerase and the promoter. It will prevent the transition from the transcription initiation to the transcription elongation stage. It will prevent the synthesis of abortive RNA transcripts while the RNA polymerase is bound at the promoter.
Once an RNA polymerase has initiated transcription, it will release the sigma factor or sigma subunits or bind other proteins known as elongation factors before it begin moving down the DNA template doing strand elongation. Briefly explain why this is necessary - why cant RNA polymerase + sigma factor do all of transcription?
Which of the following general transcription factors aids polymerase binding in the right direction on promoters? Group of answer choices TFIID TFIIB TFIIA TFIIF
In a written paragraph, describe the difference between prokaryotic and eukaryotic TRANSCRIPTION. In your response, include the following: - differences in what structures (DNA, RNA, proteins etc...) are involved - differences in timing and location - DO NOT include any details on what happens after transcription
Describe the initiation step of bacterial transcription (make sure to include important enzymes, parts, and sequences in your answer) up to the beginning of elongation. What are three ways that transcription differs between bacteria and eukaryotes? (I'm not looking for types of RNA modification, just in terms of transcription)