Can one transcription factor sometimes act as a repressor and sometimes act as an activator? O a. Yes, but it depends on where the transcription factor binds in the promoter O b. Yes, but it depends on other proteins that migth act with the transcription factor O c. No, transcription factors are always either activators or repressors O d. Yes, but only if a mutation happens One of the genes upregulated by EWS-FLI1, PTPL1, is a protein tyrosine phosphatase. Which statement about protein tyrosine phosphatases is FALSE? O a. They can inactivate cytoplasmic proteins by removing a phosphate O b. They can inactivate tyrosine kinase receptors by removing a phosphate O c. They can activate cytoplasmic proteins by removing a phosphate O d. They can inactivate cytoplasmic proteins by adding a phosphate

Can one transcription factor sometimes act as a repressor and sometimes act as an activator? O a. Yes, but it depends on where the transcription factor binds in the promoter O b. Yes, but it depends on other proteins that migth act with the transcription factor O c. No, transcription factors are always either activators or repressors O d. Yes, but only if a mutation happens One of the genes upregulated by EWS-FLI1, PTPL1, is a protein tyrosine phosphatase. Which statement about protein tyrosine phosphatases is FALSE? O a. They can inactivate cytoplasmic proteins by removing a phosphate O b. They can inactivate tyrosine kinase receptors by removing a phosphate O c. They can activate cytoplasmic proteins by removing a phosphate O d. They can inactivate cytoplasmic proteins by adding a phosphate

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Description: Can one transcription factor sometimes act as a repressor and sometimes act as an activator?O a. Yes, but it depends on where the transcription factor binds in the promoterO b. Yes, but it depends on other proteins that migth act with the transcript

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 6TYK

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Which statement/s is/are TRUE about transcription?A. During transcription, DNA polymerase binds to RNA and separates the DNA strands.B. RNA polymerase uses one strand of DNA as a template to assemble nucleotides into a strand of RNA.C. RNA polymerase binds only to DNA promoters, which have specific base sequences.D. Promoters are signals in RNA that indicate to RNA polymerase where to begin transcription.E. Transcription occurs in the 3’ to 5’ direction with respect to the growing mRNA strand.
How is transcription directly controlled in eukaryotic cells? a. through the use of phosphorylation b. by means of apoptosis c. using transcription factors and activators d. when chromatin is packed to keep genes turned on e. None of these are correct.
A mutation occurs in a gene, resulting in it being expressed at the wrong time during development. Where is the mutation most likely to be found? a) In the transcription start site (TSS) b) In a TF binding site in the cis-regulatory region c) In the coding sequence d) In the 5' UTR
You add a chemical to a cell that prevents all of the chromatin from uncoiling so that the chromosomes remain highly coiled, even after the completion of mitosis. If you add a transcription factor that triggers the transcription of mRNA for the protein Pitx in this situation what would happen. Group of answer choices A)All transcription of Pitx is stopped by the transcription factor B)Nothing because the Pitx gene is already being transcribed at the maximum ratea C)Nothing, because the Pitx gene cannot be transcribed in this highly coild state D)The amount of transcription of Pitx is greatly increasedt
Which of the following DNA elements or proteins would you expect to find only in some cells in a organism? A. The enhancer for gene Y B. The transcription factor that activates gene Y C. A general transcription factor protein D. A and B E. The promoter for gene Y
Why is regulating transcription the main way that cells control gene expression? A. Because transcription is the last step in gene expression, stopping here ensures that the cell has a stockpile of proteins to prepare them from all unexpected environmental changes. B. Because transcription involves interactions with DNA, preventing transcription reduces the changes of mutation in the cell’s genome. C. Because transcription is the first step in gene expression, stopping at transcription reduces the amount of energy and resources used by producing unnecessary gene products. D. Because transcription is the shortest step in gene expression, preventing transcription has little effect on the rate of protein production.
What is the difference between the core promoter and the regulatory promoter? a. Only the core promoter has consensus sequences. b. The regulatory promoter is farther upstream of the gene. c. General transcription factors bind to the core promoter; transcriptional activator proteins bind to the regulatory promoter. d. Both b and c.
Which of these is used in the transcription of all genes? Choose all correct answers. A. Core promoter B. Proximal promoter C. Distal promoter D. General Transcription Factors E. Regulatory Transcription Factors
What is a possible outcome of the addition of a transcription factor such as Myod to the nucleus of a cell? Assume that there are no other factors to either activate or prevent the response of the cell. Group of answer choices A) Production of mRNA from genes that were previously not expresed B)adding methyl groups to DNA C)prevention of protein synthesis D)uncoiling of the chromatin to allow transcription
Through alternative splicing, eukaryotes (a) reinforce gene inactivation (b) prevent transcription of heterochromatin (c) produce related but different proteins in different tissues (d) amplify genes to meet the requirement of high levels of a gene product (e) bind transcription factors to enhancers to activate transcription
Binding of ______ to _______ in DNA can increase the rate of transcription of specific genes. a. activators; repressors b. activators; enhancers c. repressors; operators d. both a and b
Specific transcription factors in eukaryotes interact with enhancers, which may be a long distance from the promoter. These transcription factors then a. alter the structure of the DNA between enhancer and promoter. b. do not interact with the transcription apparatus. c. can interact with the transcription apparatus via DNA looping. d. can interact with the transcription apparatus by removing the intervening DNA.