B. A researcher was trying to determine whether two molecules (A and B) were corepressors or inducers in their respective operon systems. Data was collected regarding the levels of protein and the amount of gene transcription for the genes in their respective operons. The data is shown below. Level of protein High Transcription of gene 1 Transcription of gene 2 Molecule A Low Low High High low High High Low Low Molecule B High low a) Determine whether molecule A and molecule B are inducers or corepressors. Justify your answers. b) Identify which system resembles the lac operon system and which resembles the trp operons system

B. A researcher was trying to determine whether two molecules (A and B) were corepressors or inducers in their respective operon systems. Data was collected regarding the levels of protein and the amount of gene transcription for the genes in their respective operons. The data is shown below. Level of protein High Transcription of gene 1 Transcription of gene 2 Molecule A Low Low High High low High High Low Low Molecule B High low a) Determine whether molecule A and molecule B are inducers or corepressors. Justify your answers. b) Identify which system resembles the lac operon system and which resembles the trp operons system

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter14: Gene Regulation

Section: Chapter Questions

Problem 13TYU: INTERPRET DATA Develop a simple hypothesis that would explain the behavior of each of the following...

See similar textbooks

Similar questions

MATCH THE FF. WITH THE CHOICES BELOW group of genes one long mRNA with complementary codes of 3 or more genes controlled by negative regulation a tetrameric protein, is the lacI gene product It is a palindromic DNA segment at the upstream region of lac gene has a DNA-binding domain on N-terminus; the C-terminus binds inducer, forms tetramer. an accessory protein to activate transcription regulated both positively and negatively by AraC regulatory elements of arabinose operon It is Regulated Through a Co-Repressor-Mediated Negative Control Circuit an example of autogenous regulation has attenuation regulation mechanism CHOICES: -lac operator -Catabolite activator protein -araBAD Operon -polycistronic mRNA -trp Operon -lac operon -lac repressor -Operon -AraC gene
INTERPRET DATA Develop a simple hypothesis that would explain the behavior of each of the following types of mutants in E. coli. Mutant a: The map position of this mutation is in the trp operon. The mutant cells are constitutive; that is, they produce all the enzymes coded for by the trp operon, even if large amounts of tryptophan are present in the growth medium. Mutant b: The map position of this mutation is in the trp operon. The mutant cells do not produce any enzymes coded for by the trp operon under any conditions. Mutant c: The map position of this mutation is some distance from the trp operon. The mutant cells are constitutive; that is, they produce all the enzymes coded for by the trp operon, even if the growth medium contains large amounts of tryptophan.
One strategy for producing a protein in the milk of a cow is toplace the coding sequence of the gene of interest next to a__________ and then inject the gene into a _________.a. lac operon promoter, cow oocyteb. β-lactoglobulin promoter, cow oocytec. lac operon promoter, cow mammary celld. β-lactoglobulin promoter, cow mammary cell
Given the Table below concerning the lac operon, match the letter with what would be occurring for each scenario. Repressor is bound to the operator, cAMP complex is bound and transcription is prevented. Allolactose is bound to the repressor, cAMP complex is bound, and transcription is prevalent. Allolactose is bound to the repressor, cAMP complex is not assembled, and transcription is slow Repressor is bound to the operator, cAMP complex is not assembled, and transcription is prevented.
In the absence of lactose and the lacI repressor gene is mutated such that the repressor protein product can no longer bind to the operator, the structural genes will: [ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"] In the presence of lactose and the lacI repressor gene is mutated such that the repressor protein product can no longer bind to the operator, the structural genes will: [ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"]
Study the illustration of the lac operon below. Normally, the genes are switched off when lactose is not present. Lactose activates the genes, which code for enzymes that allow the cell to use lactose. Mutations can alter the functions of this operon. Predict how the following mutations would affect the function of the operon the absence and presence of lactose. Mutation of regulatory gene; repressor will not bind to lactose. Mutation of operator; repressor will not bind to operator. Mutation of regulatory gene; repressor will not bind to operator. Mutation of promoter; RNAP will not attach to promoter.
In the lac operon system, lactose is considered the ___________, and when the gene lacI is mutated such that the protein it produces cannot bind to lactose (IS mutation), the lac operon is ________. Group of answer choices repressor; never expressed activator; constitutively expressed inducer; never expressed inducer; constitutively expressed structural gene; never expressed
Explain how alternate sigma factors can be used to initiate transcription of distinct sets of operons
Describe the probable genetic defect that abolishes the sensitivity of the lac operon to the absence of glucose when other metabolic operons continue to be sensitive to the absence of glucose.
In the presence of lactose and the promoter sequence was mutated such that the RNA polymerase can no longer bind, the structural genes will:[ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"] In the absence of lactose and the lacI repressor gene is mutated such that the repressor protein product can no longer bind to the operator, the structural genes will: [ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"] In the presence of lactose and the lacI repressor gene is mutated such that the repressor protein product can no longer bind to the operator, the structural genes will: [ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"]
In the presence of tryptophan and the promoter sequence was mutated such that the RNA polymerase can no longer bind, the structural genes will:[ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"] In the absence of tryptophan and the trpR repressor gene is mutated such that the repressor protein product can no longer bind to the operator, the structural genes will:[ Select ] ["No longer be expressed", "Be constantly expressed", "Be deleted from the operon"] In the presence of tryptophan and the trpR repressor gene is mutated such that the repressor protein product can no longer bind to the operator, the structural genes will:[ Select ] ["No longer be expressed", "Be constantly expressed", "Be constantly expressed"]
The figure above shows the structure of lac operon. Which of the following BEST describes what happens in the presence of lactose? Select one: Repressor-lactose complex forms, both the complex and RNA polymerase bind to R. Transcription of S is initiated. Repressor-lactose complex forms and the complex will not bind to R. Transcription of S is initiated. Both repressor and RNA polymerase bind to R. Transcription of S is initiated. Repressor-lactose complex forms and the complex binds to R. Transcription of S is prevented.