Which is the factor(s) involved in the regulation of gene activity? Select one: a. Transcriptional repressor/activator...
Which is the factor(s) involved in the regulation of gene activity?
Select one:
a. Transcriptional repressor/activator proteins, which bind to the operator/enhancer sequence regions.
b. SAM binding to a riboswitch mRNA.
c. Alterations in mRNA conformations by SAM during the transcription.
d. All of these.
e. None of these.
Homework Answers
Answer = Transcriptional repressor/activator proteins, which bind to the operator/enhancer sequence regions
Gene expression is primarily controlled at the level of transcription, largely as a result of binding of proteins to specific sites on DNA.
The regulator gene codes for synthesis of a repressor molecule that binds to the operator and blocks RNA polymerase from transcribing the structural genes.
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Which is the factor(s) involved in the regulation of gene
activity?
Select one:
a. Transcriptional repressor/activator...
45. Which is the factor(s) involved in the regulation of gene activity? Select one: O a....
45. Which is the factor(s) involved in the regulation of gene activity? Select one: O a. Transcriptional repressor/activator proteins, which bind to the operator/enhancer sequence regions. O b. SAM binding to a riboswitch mRNA. O c. Alterations in mRNA conformations by SAM during the transcription. O d. All of these. O e. None of these. 13. The ring is built onto ribose-5-phosphate of PRPP for its de-novo nucleotide biosynthesis, while the ring structure of the bases are synthesized separately and...
please answer all questions QUESTION 1 Where do repressor proteins bind? Repressor sequence o 3' UTR...
please answer all questions
QUESTION 1 Where do repressor proteins bind? Repressor sequence o 3' UTR Activator sequence • Operator sequence A frameshift mutation: (choose all that apply) can change the splicing of a protein can change the amino acid sequence can change protein size can revert a deletion mutation QUESTION 3 Which of the following is the critical regulatory stage for the majority of genes? mRNA splicing Initiation of translation mRNA transport • Initiation of transcription QUESTION 4 Attenuation...
the answer I gave was wrong Which of the following statements about gene regulation concerning operons...
the answer I gave was wrong
Which of the following statements about gene regulation concerning operons is INCORRECT? A regulator gene has its own promoter and is transcribed into an independent mRNA. For an operon under negative repressible control, a correpressor is required for the repressor to bind to the operator. Presence of operons where genes of related functions are clustered is common in bacteria but not in eukaryotes. For a gene under positive repressible control, the normal state is...
Match each term associated with genes and control of gene expression with the appropriate description. A...
Match each term associated with genes and control of gene expression with the appropriate description. A transcriptional unit" that consists of promoter multiple genes under the control of a single regulatory element. A transcriptional regulatory protein (prokaryotic or eukaryotic) which works by turning on or increasing gene transcription. activator The region of a gene to which RNA polymerase binds. Enhancer A transcriptional regulatory protein prokaryotic or eukaryotic) which works by turning off or decreasing gene transcription. repressor A molecule that...
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Which of the following correctly describes eukaryotic transcriptional control? a. A transcription factor is a DNA molecule that helps RNA polymerase to bind to the enhancer of a specific gene. b. An enhancer is a protein that encourages gene expression by binding to the DNA. c. The promoter is the region of RNA where DNA polymerase will bind to begin transcription. d. The interaction of multiple transcription factors may be required in order to transcribe a...
Riboswitch is a mechanism of gene activity regulation by mRNA conformation. Riboswitch can regulate ______. Select...
Riboswitch is a mechanism of gene activity regulation by mRNA conformation. Riboswitch can regulate ______. Select one: a. transcription b. translation c. both transcription and translation d. neither transcription nor translation
Which of the following statements is correct concerning operon gene control? Positive control requires an activator...
Which of the following statements is correct concerning operon gene control? Positive control requires an activator protein to stimulate transcription of the structural genes within an operon. In negative control, a repressor protein inhibits or turns off transcription of the structural genes within the operon. An inducible operon normally is not transcribed. It requires an inducer molecule to stimulate transcription either by inactivating a repressor protein in a negative inducible operon or by stimulating the activator protein in a positive...
The following is a diagram of the LCT (lactase gene) gene regulation system in humans. When...
The following is a diagram of the LCT (lactase gene) gene
regulation system in humans. When the LCT gene is transcriptionally
active, the cell produces the enzyme lactase, which is
needed to digest the lactose in many dairy products. Based on what
you know about enhancers and promoters from your reading, predict
how the following scenarios might influence LCT gene expression and
thus lactase production in cells:
The enhancer sequence is inverted, but remains intact so that
Oct1 still binds...
Transcriptional regulation in bacteria involves a combination of regulatory proteins, DNA sequences, and small effector molecules....
Transcriptional regulation in bacteria involves a combination of regulatory proteins, DNA sequences, and small effector molecules. Note the list of terms below: Activator +1 Inhibitor -10 Allolactose cAMP CAP Operator lacA Repressor lacZ Inducer a.Which of the terms describes or is an example of a regulatory protein? b.Which of the terms describes or is an example of a small effector molecule? c.Which of the terms describes of is an example of a sequence found within the DNA? d.Which of the...
Question 1 Match the term with the best definition or description; most topics relate to the...
Question 1 Match the term with the best definition or description; most topics relate to the regulation of gene expression. General type of protein which will increase transcription rates when it attaches to a site A. Factor connected to a particular gene - B. Co-repressor C. Enhancer D. Promoter E. Structural F. Intron G. Activator H. Operator I. Basal transcription J. Glucocorticoid receptor K. Sigma factor L. Mediator M. Inducer N. TATA box O. Repressor The rates of mRNA produced...
45. Which is the factor(s) involved in the regulation of gene activity? Select one: O a. Transcriptional repressor/activator proteins, which bind to the operator/enhancer sequence regions. O b. SAM binding to a riboswitch mRNA. O c. Alterations in mRNA conformations by SAM during the transcription. O d. All of these. O e. None of these. 13. The ring is built onto ribose-5-phosphate of PRPP for its de-novo nucleotide biosynthesis, while the ring structure of the bases are synthesized separately and...
please answer all questions
QUESTION 1 Where do repressor proteins bind? Repressor sequence o 3' UTR Activator sequence • Operator sequence A frameshift mutation: (choose all that apply) can change the splicing of a protein can change the amino acid sequence can change protein size can revert a deletion mutation QUESTION 3 Which of the following is the critical regulatory stage for the majority of genes? mRNA splicing Initiation of translation mRNA transport • Initiation of transcription QUESTION 4 Attenuation...
the answer I gave was wrong
Which of the following statements about gene regulation concerning operons is INCORRECT? A regulator gene has its own promoter and is transcribed into an independent mRNA. For an operon under negative repressible control, a correpressor is required for the repressor to bind to the operator. Presence of operons where genes of related functions are clustered is common in bacteria but not in eukaryotes. For a gene under positive repressible control, the normal state is...
Match each term associated with genes and control of gene expression with the appropriate description. A transcriptional unit" that consists of promoter multiple genes under the control of a single regulatory element. A transcriptional regulatory protein (prokaryotic or eukaryotic) which works by turning on or increasing gene transcription. activator The region of a gene to which RNA polymerase binds. Enhancer A transcriptional regulatory protein prokaryotic or eukaryotic) which works by turning off or decreasing gene transcription. repressor A molecule that...
Which of the following statements is correct concerning operon gene control? Positive control requires an activator protein to stimulate transcription of the structural genes within an operon. In negative control, a repressor protein inhibits or turns off transcription of the structural genes within the operon. An inducible operon normally is not transcribed. It requires an inducer molecule to stimulate transcription either by inactivating a repressor protein in a negative inducible operon or by stimulating the activator protein in a positive...
The following is a diagram of the LCT (lactase gene) gene
regulation system in humans. When the LCT gene is transcriptionally
active, the cell produces the enzyme lactase, which is
needed to digest the lactose in many dairy products. Based on what
you know about enhancers and promoters from your reading, predict
how the following scenarios might influence LCT gene expression and
thus lactase production in cells:
The enhancer sequence is inverted, but remains intact so that
Oct1 still binds...
Question 1 Match the term with the best definition or description; most topics relate to the regulation of gene expression. General type of protein which will increase transcription rates when it attaches to a site A. Factor connected to a particular gene - B. Co-repressor C. Enhancer D. Promoter E. Structural F. Intron G. Activator H. Operator I. Basal transcription J. Glucocorticoid receptor K. Sigma factor L. Mediator M. Inducer N. TATA box O. Repressor The rates of mRNA produced...
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