the two factors that bind directly to the DNA at specific sequences are TFID and TFIIB, in genreal terms what is the function of each of these two transcription factors in the initiation of transcription?

the two factors that bind directly to the DNA at specific sequences are TFID and TFIIB, in genreal terms what is the function of each of these two transcription factors in the initiation of transcription?

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Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter16: Regulation Of Gene Expression

Section: Chapter Questions

Problem 4TYK

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1. The nontemplate strand of a segment of double- helical DNA contains the sequence: (5')CGCTATAGCGTTTAG (3') (a) What is the MRNA base sequence that can be transcribed from this double helical DNA assuming you already have a ready RNA polymerase present and everything else needed for RNA transcription? Label the sequence ends and list what is required for RNA Pol to work. (b) What amino acid sequence could be coded by the MRNA in (a)'s answer assuming the AUG start codon is just upstream of the MRNA (not shown in the sequence provided)? Use table in Figure 27-7 of the Lehninger 7 th ed "Dictionary of amino acid code words in mRNAs" and write the peptide according to standard convention with abbreviations for the amino acids. (c) If the wrong strand was transcribed and then translated from the section of double stranded DNA shown above, what would the resulting amino acid sequence be? What would the mRNA sequence be? Explain your answer and label all strands. A. First letter of codon…
1. The nontemplate strand of a segment of double- helical DNA contains the sequence: (5')CGCTATAGCGTTTAG (3') (a) What is the MRNA base sequence that can be transcribed from this double helical DNA assuming you already have a ready RNA polymerase present and everything else needed for RNA transcription? Label the sequence ends and list what is required for RNA Pol to work. (b) What amino acid sequence could be coded by the mRNA in (a)'s answer assuming the AUG start codon is just upstream of the MRNA (not shown in the sequence provided)? Use table in Figure 27-7 of the Lehninger 7 th ed "Dictionary of amino acid code words in mRNAs" and write the peptide according to standard convention with abbreviations for the amino acids. (c) If the wrong strand was transcribed and then translated from the section of double stranded DNA shown above, what would the resulting amino acid sequence be? What would the MRNA sequence be? Explain your answer and label all strands. 歐歐队相阳阳一即即的 9 First letter…
1.- Outline the general process of transcription (dna->rna) include a diagram a) include the basic enzymes involved and a description of their actions b) what is the product of transcription c)what will the cell do with the product d)where does the transcription take place in prokaryotic cell
In transcription, 1. what is/are the importance of the sense and missense/antisense strands and 2. what are the importances of the series of nucleotide bases before the coding region of the locus?
2. You perform a series of experiments on the synthesis of the pituitary hormone prolactin, which is a single polypeptide chain 199 amino acids long. In the first experiment, the MRNA coding for prolactin is translated in a cell-free protein synthesizing system containing ribosomes, amino acids, tRNAs, aminoacyl-TRNA synthetases, ATP, GTP, and the appropriate initiation, elongation, and termination factors. Under these conditions, a polypeptide chain 227 amino acids long is synthesized. In a second experiment, the MRNA is translated in the same cel1-free system to which you have added SRP. In this case, translation stops after a peptide about 70 amino acids long has been produced. In a third experiment, you use the same cell-free translation system to which you have added both SRP and endoplasmic reticulum vesicles, and you find that that the prolactin MRNA now produces a polypeptide that is 199 amino acids long. A) Explain these results.
1. A DNA base sequence transcribed into messenger RNA in the following sequence: TTATCTTCGGGAGAGAAAACA. a. If you read from left to right, what amino acids are coded by this sequence? (Note: The initiation sequence is disregarded in this example.) b. If proflavine treatment caused the deletion of the first adenine nucleotide on the left, describe the changes that would occur in the first six amino acids coded by this sequence?
1.) Define transcription and translation. How does transcription and translation differ in prokaryotes vs. eukaryotes (i.e. What is present in one but not the other)? 2.) What it means when we say that genetic code is redundant? 3.) Describe the stages of transcription (in detail for each step) - what components are required? 4.) Describe the stages of translation in eukaryotes (initiation, elongation, termination)
5a The two factors that bind directly to the DNA at Pacific sequences are TFIID and TFIIB- in general terms what is the function of each of these two transcription factors in the initiation of transcription This is not a graded question and it will never be graded, This is for studying purpose only
6. Similar to the class notes (Intro to Genetics), a segment of DNA (shown below) contains a promoter segment (the first 9 base pairs), a ribosome binding segment (the next 6 base pairs), and a segment that codes for protein synthesis which is started by the rest of the base pairs. ACTCCATTGAACCATTTCTATGATCCGCTAACG-... TGAGGTAACTTGGTAAAGATACTAGGCGATTGC-... A. When the DNA is induced to be copied to mRNA, the top strand is coding, meaning that the mRNA makes an identical copy of the lower strand (replacing T with U) The mRNA copy starts with the ribosome binding sequence. What is the sequence of the mRNA that will go to the ribosomes? B. What are the first 6 amino acids of the protein that are coded for by the mRNA? C. What would the amino acid sequence be if... i. a transition mutation occurred on the final G in the mRNA? ii. all of the G & C bases in the protein synthesis portion had transition mutations? iii. a point deletion mutation occurred in the ATA sequence (in the lower strand…
8 There is a promoter of a tumour suppressor gene in a mutant cancer cell line, and discover that instead of a nucleosome free region 5’ of the transcription start site there are nucleosomes bound. What would be the likely consequence on transcription of this gene? I am not sure about what is the outcome, normally it binds to the nucleosome free region 5' of the transcription start site to initiate transcription. Now, it binds with nucleosomes. What will happened? Is the DNA cannot transcripted successfully? Due to the transcription needs a naked DNA to process while in nucleosomes, DNA has been wrapped up. Thank you.
14. Which mutation would be more harmful to a cell? For each predict the outcome of each mutation and explain one is worse than the other A) A mutation in the anticodon of Ala-tRNA from IGC to IGG OR a mutation in the alanyl tRNA synthase such that it adds either Ala or Ile to the appropriate tRNA? B) A mutation in bases 11 and 24 of the Ser-tRNA (both important recognition elements for serinyl tRNA synthase OR a mutation in the proofreading site of serinyl tRNA that inactivates proofreading
6. Indicate whether each of the following events occurs when tryptophan is high or when tryptophan is low by placing a check in each of the appropriate blanks. Share your reasoning. Tryptophan Tryp high Event Ribosome does not stall at Trp codons Region 2 of the leader pairs with region 3 Ribosome covers part of region 2 of leader Transcription is terminated before structural genes are transcribed