Homework Answers
1. trp operon: tryptophan present, lac operon: lactose absent
2. lac operon: lactose present glucose present, ytp operon: tryptophan absent
3. lac operon: lactose present, glucose absent
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The trp and lac operons are regulated in various ways. How do bacteria regulate transcription of...
The following two questions go together and the first question is only vocabulary Regulation of model...
The following two questions go together and the first question
is only vocabulary
Regulation of model operons The trp lac operons are regulated in various ways. How do bacteria regulate transcription of these operons Sort the statement into the appropriate bins depending on whether or not each operon would be transcribed under the stated conditions. Operon vocabulary Can you match terms related to operons to their definitions? Drag the terms on the left to the appropriate blanks on the right...
Describe in detail two ways in which transcription of the trp operon (containing genes used for...
Describe in detail two ways in which transcription of the trp operon (containing genes used for biosynthesis of trypotophan) and lac operon (containing genes used for digestion of lactose) are regulated differently. Include what types of proteins/ligands are regulating each operon, and how the various components interact. Diagrams may be helpful to your explanation.
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible...
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible and inducible genetic system? 3. Expression of the Lac operon is under the controls of (1) the Lacl repressor and (2) CAP. Consider each of the following conditions and determine which factors will be acting on the operon. Predict the rate of gene expression. Conditions Lac Operon fon" or "off" CAP present" or "absent" at Lac Operon Predict the rate of gene expression (none,...
A particular gene (call it xyz) is, like the lac operon, regulated both by Negative and...
A particular gene (call it xyz) is, like the lac operon, regulated both by Negative and by Positive control. However, unlike the lac operon, xyz's Negative control system is repressible. We'll call the repressor signal "signal 1." The Positive control system of xyz, like that of lac, is inducible. We'll call the inducer "signal 2." I want you to sketch the xyz gene in the presence and absence of each signal, as follows, and then determine whether the xyz gene...
In this problem you will explore how to solve problems involving partial diploid lac operon bacterial...
In this problem you will explore how to solve problems involving partial diploid lac operon bacterial strains. Bacterial strains that are "partially diploid" have two copies of the lac operon because they aquired a plasmid carrying just the lac operon region. One copy of the lac operon region is on the recipient's bacterial chromosome, and the other copy is on the F' plasmid that was introduced into the cell by conjugation. Partial diploid genotypes are written with the F' segment...
1) The FOXP2 transcription factor is expressed in human brain, heart, and lungs. The protein is...
1) The FOXP2 transcription factor is expressed in human brain, heart, and lungs. The protein is required for normal development. Given that eukaryotic genes do not occur in operons, how can the STAT 1 transcription factor simultaneously regulate the transcription of more than 275 different target genes? 2) Many genes are transcribed constitutively, while others are regulated specifically. Regulation can occur in response to various stimuli in either a positive or negative direction. Describe one type of gene that would...
In this problem you will explore how to solve problems involving partial diploid lac operon bacterial...
In this problem you will explore how to solve problems involving partial diploid lac operon bacterial strains. Bacterial strains that are "partially diploid" have two copies of the lac operon because they aquired a plasmid carrying just the lac operon region. One copy of the lac operon region is on the recipient's bacterial chromosome, and the other copy is on the P plasmid that was introduced into the cell by conjugation. Partial diploid genotypes are written with the P segment...
5. Jacob, Monod, and Pardee used various E.coli mutants to help determine how the lac operon...
5. Jacob, Monod, and Pardee used various E.coli mutants to help determine how the lac operon is regulated. The descriptions of some of the mutants are listed. For each E. coli mutant determine if the lac operon would be on or off in a lactose-only environment. laci mutant: This mutant produces a super repressor that is not inactivated by allolactose. It will still stick. Operater will be off, lacO mutant: This mutant has an altered operator sequence so that the...
Yet, all the cells in your body contain the same genes (and same alleles). The difference...
Yet, all the cells in your body contain the same
genes (and same alleles). The difference across cell types
is that genes get selectively expressed (turned on or off)
based on the proteins needed for cellular function given their
environment.
Select which statement explains the reason why hair does not
normally grow on your muscle cells.
a.
Muscle cells have the gene for keratin, but do not express
it
b.
Muscle cells do not have the gene for keratin and...
In what ways are job-order and process costing similar? How do they differ? Under what conditions...
In what ways are job-order and process costing similar? How do they differ? Under what conditions would it be more appropriate to use a job-order costing system? Under what conditions would it be more appropriate to use a process costing system?
The following two questions go together and the first question
is only vocabulary
Regulation of model operons The trp lac operons are regulated in various ways. How do bacteria regulate transcription of these operons Sort the statement into the appropriate bins depending on whether or not each operon would be transcribed under the stated conditions. Operon vocabulary Can you match terms related to operons to their definitions? Drag the terms on the left to the appropriate blanks on the right...
1. Describe how bacteria regulate genes through operons. 2. What is the difference between a repressible and inducible genetic system? 3. Expression of the Lac operon is under the controls of (1) the Lacl repressor and (2) CAP. Consider each of the following conditions and determine which factors will be acting on the operon. Predict the rate of gene expression. Conditions Lac Operon fon" or "off" CAP present" or "absent" at Lac Operon Predict the rate of gene expression (none,...
In this problem you will explore how to solve problems involving partial diploid lac operon bacterial strains. Bacterial strains that are "partially diploid" have two copies of the lac operon because they aquired a plasmid carrying just the lac operon region. One copy of the lac operon region is on the recipient's bacterial chromosome, and the other copy is on the P plasmid that was introduced into the cell by conjugation. Partial diploid genotypes are written with the P segment...
5. Jacob, Monod, and Pardee used various E.coli mutants to help determine how the lac operon is regulated. The descriptions of some of the mutants are listed. For each E. coli mutant determine if the lac operon would be on or off in a lactose-only environment. laci mutant: This mutant produces a super repressor that is not inactivated by allolactose. It will still stick. Operater will be off, lacO mutant: This mutant has an altered operator sequence so that the...
Yet, all the cells in your body contain the same
genes (and same alleles). The difference across cell types
is that genes get selectively expressed (turned on or off)
based on the proteins needed for cellular function given their
environment.
Select which statement explains the reason why hair does not
normally grow on your muscle cells.
a.
Muscle cells have the gene for keratin, but do not express
it
b.
Muscle cells do not have the gene for keratin and...
In what ways are job-order and process costing similar? How do they differ? Under what conditions would it be more appropriate to use a job-order costing system? Under what conditions would it be more appropriate to use a process costing system?
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