Use the lac operon to describe the process of controlling transcription through operons (structural gene, operator (vs. promoter), inducer, repressor, regulatory gene)
Q: Using the lac operon as a model, explain the role of inducers, repressors, and inducer exclusion.
A: Genomic DNA (deoxyribonucleic acid) consists of both structural and regulatory genes. The structural…
Q: In the trp operon, tryptophan itself serves as the effector for the trp repressor which causes it to…
A: trp operon is also known as Tryptophan operon An operon are gene clusters coding structural proteins…
Q: The lac operon is an example of ________ control in which the presence of an ________ is required…
A: lac operon is present in E.coli and it produce the enzymes which are required for the lactose…
Q: Define an operon.give an example,exaplain an inducible operon?
A: Gene regulation is the mechanism which acts to either induce or repress the gene expression. It…
Q: Describe the main features of repressible operons.
A: An operon is defined as a particular set of genes present on a DNA that operates under same…
Q: The TATA box is located at which region of the promoter? O Position 0 O Position -35 O Position -10…
A: A TATA box is a DNA sequence that tells how to read and decode a genetic sequence. It's a form of…
Q: Explain, with diagrams, how transcriptionattenuation works in the trp operon.
A: Atteunation is a mechanism of control in some bacterial operons which results in premature…
Q: Compare and contrast the roles of a corepressor and an inducer innegative regulation of an operon.
A: Gene regulation is the process through which the cells control the expression of genes. It controls…
Q: Describe briefly the Trp operon? Why is it considered an example of negative regulation?
A: An operon is a cluster of genes that are transcribed together to give a single messenger RNA (mRNA)…
Q: Which of the following statements about gene regulation is false? a. An operon contains DNA…
A: Introduction Gene expression is the process in which the genetic information present in the DNA…
Q: Vocabulary Words: (List at least 4 key words and define them) Define all of them: Operon: RNA…
A: In molecular biology the central dogma is the main process by which proteins are produced from the…
Q: Compare and contrast the lac operon and repressible operon systems.
A: Expression of each and every gene is not always required in an organism. Gene expression must occur…
Q: The regulatory gene that codes for the tryptophan repressor is not tightly linked to the trp operon.…
A: Bacteria such as E.coli need amino acids to survive and such as amino acid Tryptophan. If tryptophan…
Q: How does the Trp operon work? A. Binding of Trp to a repressor protein allows the repressor to bind…
A: Trp operon is the cluster of genes that are responsible for synthesis pf operon
Q: Differentiate between positive and negative control, and show how both types of control operate in…
A: Controls are always part of the scientific experiments. They help researchers to conduct…
Q: Compare what happens with each "key player" at the lac operon when lactose is present vs. not…
A: Lac operon is a simple prokaryotic group of genes for the metabolism of lactose. It consists of…
Q: Explain how the Lac operon works to regulate the expression of genes in bacteria. Explain the operon…
A: Bacteria has chromosome and some extra chromosomal plasmids.
Q: IS binding to the repressor, rendering it inactive and turning the operon on. Lactose is binding to…
A: The lac operon is an operon, or group of genes with a single promoter.The genes in the operon encode…
Q: Describe the difference between a repressible and an inducible operon.
A: The theory of Operon comes from the concept of "gene-regulation" proposed by Jacob and Monod. It is…
Q: Describe how the trp operon is under negative control
A: Introduction Gene Regulation: Expression of gene is highly regulated in both prokaryotes as well as…
Q: Distinguish between a repressible operon and aninducible operon.
A: The Operon is the regulatory system present in DNA in cluster form, which contains structural genes…
Q: In the histidine operon, if the codons coding for histidine were removed, which of the following…
A: Histidine operon: Histidine operon works by attenuation (premature transcription termination). At…
Q: What would occur if the repressor of an inducible operon weremutated so it could not bind the…
A: An operon is a functional unit of genomic DNA made up of group of genes that is controlled by a…
Q: Study the illustration of the lac operon below. Normally, the genes are switched off when lactose is…
A: 1. When lactose is unavailable, the lac repressor binds strongly to the operator, inhibiting RNA…
Q: Define regulation of gene expression with suitable model (lac operon) ?
A: Gene expression is the process by which the instructions in the DNA are converted into a functional…
Q: If an operon is controlled by an activator and the substrate of the metabolic pathway then the type…
A: An operon can be defined as that functional unit of DNA containing many genes, all of which are…
Q: Describe the organization of the trp operon.
A: Tryptophan operon (trp operon) is the mechanism of the biosynthesis of tryptophan in the E. coli.…
Q: Give the Genetic Proof of the Operon Model ?
A: An operon represents a genetic unit with one or more structural genes and an operator sequence and…
Q: One strategy for producing a protein in the milk of a cow is toplace the coding sequence of the gene…
A: One strategy for producing a protein in the milk of a cow is toplace the coding sequence of the gene…
Q: In the trp operon, what happens to the trp repressor in the absence of tryptophan? a. It binds to…
A: An operon refers to a group of functionally-associated genes that are controlled by a shared…
Q: Mutations may have an effect on the expression of the lac operon and the trp operon. Would the…
A: Mutations are defined as the change in the sequence of DNA of an organism due to any environmental…
Q: Explain the function of trp operon in bacteria, the mode of that operon, the context that will turn…
A: A group of genes making up a regulatory or control unit. The unit includes regulator, operator,…
Q: Draw a schematic diagram showing the components involved in the regulation of the tryptophan operon.
A: The trp operon is regulated by the trp repressor. When bound to tryptophan, the trp repressor blocks…
Q: Which of the following mechanisms is an example of post-transcriptional gene regulation? A. binding…
A: The DNA (deoxyribonucleic acid) is the hereditary unit of an organism. It consists of purines and…
Q: Operons involved with the biosynthesis of molecules such as amino acids are most likely to be…
A: A repressible operon encodes for anabolic enzymes. The genes that encode these anabolic enzymes tend…
Q: The DNA sequence before the protein coding region that determines when a gene is used is called the…
A: DNA is the genetic material of many organisms including the humans. The DNA contains information…
Q: Which of the following diagrams best models the regulation of the trp operon when tryptophan is…
A: An operon is a polycistronic gene regulated by a common promoter and regulatory sequences. Operons…
Q: Explain how the trp operon is regulated by trp repressor and by attenuation.
A: Gene is the hereditary unit occupying a specific position in the chromosome and carries information…
Q: In the lac operon system, lactose is considered the ___________, and when the gene lacI is mutated…
A: The genes are the hereditary unit of an organism which are passed on from the parental generation to…
Q: Differentiate between inducible and repressible opero
A: An operon is a group of genes that are expressed under the same promoter.
Q: DEFINE what is an Operon, and compare and contrast regulation of the LAC Operon and the TRP Operon.…
A: As per our honor code, we are allowed to answer one question at a moment. You have posted multiple…
Q: What is a specific region in the trp operon that you could mutate so it expresses the trp operon in…
A: Introduction : The Trp Operon Codes For The Components Required For Tryptophan Production. An Operon…
Q: If a particular operon encodes enzymes for making an essential amino acid is regulated like the trp…
A: The operon has five structural genes that code for the three enzymes required to convert chorismic…
Q: Define the following in the context of operons: a. positive control b. give an example of an…
A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…
Q: In regulations demonstrated by initiation of transcription, if lactose is abundant, lactose in this…
A: The promoter is a region on the lac operon which is bounded by RNA polymerase to initiates the…
Q: Explain how alternate sigma factors can be used to initiate transcription of distinct sets of…
A: Answer: Introduction: Sigma factors is a bacterial transcription factors which can attach core RNA…
Q: For each of the following types of transcriptional control, indicate whether the protein produced by…
A: An inducible operon is one which is not transcribed. For transcription of the molecule, It requires…
Q: When lactose is present lactose induces the activation of the genes in the lac operon by binding…
A: The Lac operon is an inducible operon that is inhibited by a repressor protein in the absence of…
Use the lac operon to describe the process of controlling transcription through operons (structural gene, operator (vs. promoter), inducer, repressor, regulatory gene)
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- Tryptophan (Trp) attenuation is an extra mechanism of regulation of trp operon when trp level is too high. Attenuation causes premature transcription termination. c) Review the region that is responsible for trp attenuation during low trp level.Tryptophan (Trp) attenuation is an extra mechanism of regulation of trp operon when trp level is too high. Attenuation causes premature transcription termination. b) Predict what will happen if trp repressor lose its allosteric effect.a. What is the function of operons in bacterial gene regulation? b. Describe how a bacterial operon can be regulated by repressible proteins (such as the tryptophan operon). Include in your description both the “on” and “off” states of the operon. Key elements of your diagram should include: Co-repressor, Genes, mRNA, Operator, Operon, Promoter, Repressor, RNA polymerase.
- The trp operon is: **(for additional information review the CogBooks Module, answer explained on CogBooks): In the absence of tryptophan, the trp repressor dissociates from the operator, and RNA synthesis proceeds. promoter operator trpE| trpD trpC trpB trpA RNA polymerase repressor When tryptophan is present, the trp repressor binds the operator, and RNA synthesis is blocked. promoter operator trpE trpD trpC trpB trpA RNA polymerase; repressor tryptophan Both negative inducible and positive repressible Positive inducible Negative Repressible O Negative inducibleWhen CAMP binds to the Catabolite Activator Protein (CAP), it causes a conformational change on the protein, which results in binding to the CAP- binding site on the DNA and molecule is known as a(n) of the lac operon. This conformational change induced by the binding of another transcription activation; allosteric effect transcription repression; binding effect translation; distortion effect mutation; interactive effect attenuation; compression effect O O O OFor the following types of transcriptional control, indicate whether the protein produced by the regulator gene will be synthesized initially as an active repressor or as an inactive repressor. Q. Negative control in a repressible operon
- As diagrammed below, some amino acid biosynthetic operons have stem loop structures in the mRNA. These structures play a role in the regulation of the operon by which of the following mechanisms? Translation stop codon- Attenuator loop. mRNA 5' 3' DNA attenuator trpE O Catabolite repressor protein can bind and prevent the hairpins from forming thus allowing translation to occur. O The leader sequence shown contains codons for the amino acid. When these are low, the ribosome stalls, allowing a hairpin between the two middle regions to form so that the rest of the message can be translated. In the presence of large amounts of the amino acid, the hairpin will wind around the amino acid and prevent further translation. O A repressor protein made of that amino acid will bind to the region and prevent translation when large amounts of the amino acid are present. O The uridine-rich region has codons for that amino acid; when present, this region will be a terminator region. The hairpins allow…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 Molecule B High low Low a) Dete b) Identify which system resembles the lac operon system and which resembles the trp operons system nine whether molecule A and molecule B are ducers or corepressors. Justify your answers.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.
- An operon is a group of genes under the control of a single promoter. Match each type of operon with the descriptions. Inducible Sufficient amounts of the gene product inhibit further transcription. Transcription occurs regardless of environmental conditions. Repressible Answer Bank Constitutive Activating the repressor gene product inhibits transcription. Under default conditions, transcription is inhibited.What is a specific region in the trp operon that you could mutate so it expresses the trp operon in conditions of excess tryptophan. Why will this mutation cause this? Operon structure: promoter, operater, structural genes promoter - DNA region that is the site of RNA polymerase sigma binding and transcription initiation operator – DNA region that influences gene expression through its interaction with a protein (transcription factor) structural genes – gene whose expression is being regulated; encodes a polypeptide or functional RNAFor the following types of transcriptional control, indicate whether the protein produced by the regulator gene will be synthesized initially as an active repressor or as an inactive repressor. Q. Negative control in an inducible operon