Within the control region of the tryptophan operon is a section of DNA that is sensitive...
Within the control region of the tryptophan operon is a section of DNA that is sensitive to levels of tryptophan in the system. What is the name of this region?
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Within the control region of the tryptophan operon is a
section of DNA that is sensitive...
1. The terminating "hairpin" loop occurs in the tryptophan operon when ________. A. sufficient glucose is...
1. The terminating "hairpin" loop occurs in the tryptophan operon when ________. A. sufficient glucose is present. B. sufficient tryptophan is present. C. insufficient tryptophan is present. D. insufficient glucose is present. E. None of the above 2. When tryptophan is present in the medium and available to the bacterium, ________. A. the repressor is inactive and the tryptophan operon is "off" B. the repressor is inactive and the tryptophan operon is "on" C. the repressor is bound to the...
Prepare two diagrams illustrating the tryptophan operon attenuation mechanism. One diagram should be for the condition...
Prepare two diagrams illustrating the tryptophan operon attenuation mechanism. One diagram should be for the condition of low tryptophan concentration and the other for high tryptophan concentration. Write at least two sentences for each of the two diagrams that explains how attenuation allows bacteria to control the level of tryptophan. Provide the following labels on the diagrams to support your explanation: DNA, mRNA, polypeptide, RNA polymerase, ribosome, tryptophan codons, mRNA region #1, mRNA region #2, mRNA region #3, mRNA region...
In the trp operon could Tryptophan get synthesized if the bacterial DNA was mutated at the...
In the trp operon could Tryptophan get synthesized if the bacterial DNA was mutated at the site of the Promoter sequences? In other words, if the Promoter couldn’t function normally would Tryptophan be synthesized? Would you get a different answer depending on whether or not there was Tryptophan present in the cell? Give a molecular explanation.
P OPERON What happens to transcription at the trp operon when 1. tryptophan levels are low? Why? ...
P OPERON What happens to transcription at the trp operon when 1. tryptophan levels are low? Why? 2. Illustrate it. Include: RNA repressors erase, repressors, and any other molecules needed to show how this worke. GENE TURNED ON -+ + +- Promoter OperatorStructural Genes 3. What happens to transcription at the trp operon when trypto 4. Illustrate it. Include: RNA polymerase, e, repressors and any other molecules needed to show the following GENE TURNED OFF Promoter Operator Structural Genes Circle...
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
a mutant repressor...
region is a DNA sequence that regulates transcription. Within a gene, a region is a DNA...
region is a DNA sequence that regulates transcription. Within a gene, a region is a DNA sequence that encodes RNA and a o coding, barcoding o control, coding o noncoding, control o coding, control During transcription, the DNA template is read in the ___direction. o 3 to 5 oC to N terminal ON to C terminal 0 5' to 3' For genes encoding protein, which of the following is the eukaryotic consensus sequence of the promoter? ATAT o GCGC CGCG...
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...
For Questions 4-18, consider the mutations described in the left-hand column below. Identify whether the Lac operon will be ON or OFF in each of the environments listed across the top. The expression...
For Questions 4-18, consider the mutations described in the left-hand column below. Identify whether the Lac operon will be ON or OFF in each of the environments listed across the top. The expression of the normal (wild type) operon is given. Note that "ON" and "OFF" refer to whether the operon is expressed at high levels (ON) or basal//low/no levels (OFF). (Hint: mutations render the indicated site inactive while leaving the remaining part of the operon or protein functional.) Note...
Complete the comparison of the lac Operon and trp Operons as a means of gene regulation.
ACTIVITY #2: Operon control of gene expressionComplete the comparison of the lac Operon and trp Operons as a means of gene regulation. lac operorn trp operon Regulates production of Name of Regulatory gene" and what it produces What binds to the operator & when does this occur: Structural genes controlled by the operon and how their expression is controlled: High levels of what substance affects the operon how?
1. (1 points) A deletion mutation in the leader sequence of the trp operon removes the...
1. (1 points) A deletion mutation in the leader sequence of the trp operon removes the two tryptophan codons that are involved in attenuation. Predict the effect of this mutation on the expression of the trp structural genes in E. coli cells grown in media that lacks tryptophan. 2. (2 points) What protein family members are the main protein components of the RISC complex? How does the RISC complex target specific mRNAs for silencing? 3. (3 points) In bacteria, the...
P OPERON What happens to transcription at the trp operon when 1. tryptophan levels are low? Why? 2. Illustrate it. Include: RNA repressors erase, repressors, and any other molecules needed to show how this worke. GENE TURNED ON -+ + +- Promoter OperatorStructural Genes 3. What happens to transcription at the trp operon when trypto 4. Illustrate it. Include: RNA polymerase, e, repressors and any other molecules needed to show the following GENE TURNED OFF Promoter Operator Structural Genes Circle...
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...
region is a DNA sequence that regulates transcription. Within a gene, a region is a DNA sequence that encodes RNA and a o coding, barcoding o control, coding o noncoding, control o coding, control During transcription, the DNA template is read in the ___direction. o 3 to 5 oC to N terminal ON to C terminal 0 5' to 3' For genes encoding protein, which of the following is the eukaryotic consensus sequence of the promoter? ATAT o GCGC CGCG...
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...
For Questions 4-18, consider the mutations described in the left-hand column below. Identify whether the Lac operon will be ON or OFF in each of the environments listed across the top. The expression of the normal (wild type) operon is given. Note that "ON" and "OFF" refer to whether the operon is expressed at high levels (ON) or basal//low/no levels (OFF). (Hint: mutations render the indicated site inactive while leaving the remaining part of the operon or protein functional.) Note...
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