An activator regulatory protein… a. Is a cis-acting regulatory element b. Recruits RNA polymerase to the...
An activator regulatory protein…
a. Is a cis-acting regulatory element
b. Recruits RNA polymerase to the promoter
c. Prevents RNA polymerase from binding the promoter
d. Is involved in negative regulatory control
Homework Answers
The correct option is (a), is a cis-acting regulatory element
It is because activator regulatory proteins are also known as enhancers, and cis-acting regulatory elements, that are found on the same molecule of DNA. These proteins increase the rate of transcription.
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An activator regulatory protein…
a. Is a cis-acting regulatory element
b. Recruits RNA polymerase to the...
1) The lac operon is… a) Positive repressible b) Both negative inducible and positive repressible c)...
1) The lac operon is… a) Positive repressible b) Both negative inducible and positive repressible c) Positive inducible d) Negative inducible 2) An activator regulatory protein… a) Is involved in negative regulatory control b) Is a cis acting regulatory element c) Recruits RNA polymerase to the promoter d) Prevents RNA polymerase from binding the promoter 3) For the lac operon, the presence of the substrate (lactose) activates the repressor. True or False? a) true b) false 4) cAMP… a) Activates...
son Label the diagram below (A-Protein coding region B-Regulatory switches C-Promoter D. mRNA e. RNA polymerase)...
son Label the diagram below (A-Protein coding region B-Regulatory switches C-Promoter D. mRNA e. RNA polymerase) (2) f. Assume that a fish inherits a deletion mutation in the pituitary switch such that the switch becomes inactive. You isolate DNA from jaw, pelvic, eye, and pituitary tissues. In the DNA of which tissue(s) would you expect the pituitary switch mutation? (2)
In the GAL gene system, __________ are cis-acting regulatory elements, and __________ protein is a trans-acting...
In the GAL gene system, __________ are cis-acting regulatory elements, and __________ protein is a trans-acting regulatory protein.
B) Some pathogens make fimbriae to attach to cells lining the gut of their host. However,...
B) Some pathogens make fimbriae to attach to cells lining the gut of their host. However, it would be a waste of resources to make fimbriae when not in the gut. In some bacteria, fimbrial gene transcription is initiated when the cell detects leucine, which would likely be abundant in a nutrient-rich environment like an intestine. The fimbriae (fim) genes are under positive control, wherein a regulatory protein (FRP) binds to an activator-binding site when leucine is present. Draw the...
In positive control, the function of the activator molecule is to increase the affinity of RNA...
In positive control, the function of the activator molecule is to increase the affinity of RNA polymerase to the promoter. bind with repressor molecules to prevent them from blocking the operator. increase the affinity of the inducer molecule to the promoter. bind with inducer molecules to increase their affinity to the promoter.
There are several possible mutations in the trp operon: trpP -is a mutation in the promoter...
There are several possible mutations in the trp operon:
trpP -is a mutation in the promoter sequence
that prevents RNA polymerase from binding to the promoter and
initiate transcription of the trp operon genes.
trpOcis a mutation in the operator sequence
that prevents the trp repressor protein from binding to
the operator to block transcription of the trp operon
genes.
trpR-is a mutation in the repressor protein
that either prevents repressor protein from being made or produces
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Which of the following statements is true? A. RNA polymerase has a proofreading activity B. Prokaryotic...
Which of the following statements is true? A. RNA polymerase has a proofreading activity B. Prokaryotic RNA usually undergoes nuclear processing C. Polypeptides are synthesized by addition of amino acids to the amino terminus. D. The 3' end of mRNA corresponds to the carboxyl terminus of the protein. Grade 2. Which of the following A. It may be autocatalytic. B. Spliceosomes are present in organelles and nuclei C. It involves removal of exons is true regarding RNA processing? D. It...
3. The CAP activator protein and the Lac repressor both control the Lac operon (see Figure...
3. The CAP activator protein and the Lac repressor both control the Lac operon (see Figure 28-14). Fill out the table below with No expression, Low/Medium expression, or High expression to summarize when the Lac operon will be expressed in each of the three E. coli strains in the table. An example has been done for you. RNA polymerase- binding site (promoter) CAP binding site start site for RNA synthesis operator Lacz gene -80 -40 14080 nucleotide pairs Figure 08-14...
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...
6:35 5 minutes ago 25) Which of the following turns off transcription by binding to the operator? A) repressons B) lactose C) RNA polymerase D) promoters E) enzymes 25) 26) In bacteria, what n...
6:35 5 minutes ago 25) Which of the following turns off transcription by binding to the operator? A) repressons B) lactose C) RNA polymerase D) promoters E) enzymes 25) 26) In bacteria, what name is given to a cluster of genes with related functions, along with their control 26) A) exon B) operon C) promoter D) activator E) regulatory gene A mutant bacterial cell has a defective aminoacyl synthetase that attaches a lysine to tRNAs with the anticodon AAA instead...
son Label the diagram below (A-Protein coding region B-Regulatory switches C-Promoter D. mRNA e. RNA polymerase) (2) f. Assume that a fish inherits a deletion mutation in the pituitary switch such that the switch becomes inactive. You isolate DNA from jaw, pelvic, eye, and pituitary tissues. In the DNA of which tissue(s) would you expect the pituitary switch mutation? (2)
B) Some pathogens make fimbriae to attach to cells lining the gut of their host. However, it would be a waste of resources to make fimbriae when not in the gut. In some bacteria, fimbrial gene transcription is initiated when the cell detects leucine, which would likely be abundant in a nutrient-rich environment like an intestine. The fimbriae (fim) genes are under positive control, wherein a regulatory protein (FRP) binds to an activator-binding site when leucine is present. Draw the...
There are several possible mutations in the trp operon:
trpP -is a mutation in the promoter sequence
that prevents RNA polymerase from binding to the promoter and
initiate transcription of the trp operon genes.
trpOcis a mutation in the operator sequence
that prevents the trp repressor protein from binding to
the operator to block transcription of the trp operon
genes.
trpR-is a mutation in the repressor protein
that either prevents repressor protein from being made or produces
a mutant repressor...
Which of the following statements is true? A. RNA polymerase has a proofreading activity B. Prokaryotic RNA usually undergoes nuclear processing C. Polypeptides are synthesized by addition of amino acids to the amino terminus. D. The 3' end of mRNA corresponds to the carboxyl terminus of the protein. Grade 2. Which of the following A. It may be autocatalytic. B. Spliceosomes are present in organelles and nuclei C. It involves removal of exons is true regarding RNA processing? D. It...
3. The CAP activator protein and the Lac repressor both control the Lac operon (see Figure 28-14). Fill out the table below with No expression, Low/Medium expression, or High expression to summarize when the Lac operon will be expressed in each of the three E. coli strains in the table. An example has been done for you. RNA polymerase- binding site (promoter) CAP binding site start site for RNA synthesis operator Lacz gene -80 -40 14080 nucleotide pairs Figure 08-14...
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...
6:35 5 minutes ago 25) Which of the following turns off transcription by binding to the operator? A) repressons B) lactose C) RNA polymerase D) promoters E) enzymes 25) 26) In bacteria, what name is given to a cluster of genes with related functions, along with their control 26) A) exon B) operon C) promoter D) activator E) regulatory gene A mutant bacterial cell has a defective aminoacyl synthetase that attaches a lysine to tRNAs with the anticodon AAA instead...
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