Q: A mutation in the lac operator that prevents binding of the lac repressor to the operator
A: Lac operon The lac operon is a group of genes with a single promoter. It consists of three genes…
Q: Under which conditions does the trp repressor block transcription of the trp operon? when the…
A: The trp operon responds to a repressor protein that binds to two molecules of tryptophan. When the…
Q: Here is a another cell with 2 copies of the lac operon. Same directions and points as the previous…
A: Lac operon is responsible for break down of lactose into glucose and galactose. It is the segment of…
Q: Which of the following molecules is an inducer of the lac operon:a. Galactose d. Isothiocyanateb.…
A: The structural genes lac z, lac y, and lac in the lac operon code for beta-galactosidase (converts…
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: Which of the following IS a trans acting factor? Shine Dalgarno sequence O Oric Lac Operator O TATA…
A: The trans-acting elements are record factors or other DNA-restricting proteins which perceive and…
Q: the folid ing mutations would result in the highest level of lac operon transcription in the absence…
A: Lac operon is an operon required for the transport and metabolism of lactose in E. coli and many…
Q: In the lac operon, the product of structural gene lacY is capable of
A: Lac operon It contains a operator, a promoter, repressor, and structural gene. The structural gene…
Q: A mutation at the operator prevents the regulator protein from binding. What effect will this…
A: An operon includes a group of genes that have a common promoter, regulator, and would be transcribes…
Q: Describe the regulation of the lac operon when lactose is present and glucose is present Your…
A: The operon consists of a series of structural gene like Z, Y and A. a segment of DNA called an…
Q: What effect will the above process have on the tryptophan operon? RNA polymerase will detach from…
A: An operon is a functional unit of DNA (Deoxyribonucleic acid) containing a cluster of genes under…
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: Which of the following conditions is most likely to result in an increase rate of transcription of…
A: Lactose in bacteria is called beta-galactoside which is used as energy and as a carbon source.…
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: The lac operon is controlled by two main proteins. These proteins a. both act in a negative…
A: The lac (lactose) operon functions during the transcription and translation of genes required for…
Q: The Lac operon is a common example of prokaryotic control of gene expression. In what condition is…
A: Lac operon consists of structural genes such as lacZ, lacY, and lacA which are responsible for the…
Q: You grow bacteria in media where the only carbon source is lactose (rich lactose media). Which of…
A: Introduction- Lysogen is defined as the strain of bacteria affected by a virus, i.e., a phage that…
Q: Match each of the following mechanisms with how it can change the levels of gene products--whether…
A: Operons are DNA segments that include groups of associated genes. They consist of a promoter region,…
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: What effect will the above process have on the tryptophan operon? RNA polymerase will detach from…
A: Regulation of gene expression is the mechanism by which the genes are switched off and on depending…
Q: In the presence of lactose and the presence of glucose the lac operon is not expressed . Lacl is […
A: In the presence of glucose as well as lactose, inhibitor/repressors gene is bound to the operator…
Q: Is the fox operon inducible or repressible?
A: Regulatory gene in the operon produces a protein which can act as either inhibitor or activator of…
Q: Which of the following describes the lac operon in E. coli when lactose and glucose is present in…
A: The lac repressor acts as a lactose sensor. It normally blocks transcription of the operon, but…
Q: Which of the following arabinose operon regulatory sites is exclusively involved in the repression…
A: Answer - Option B - ara O2
Q: The lac operon is. Negative inducible Positive repressible Positive inducible Both negative…
A: Question - The lac operon is. A)- Negative inducible B)- positive repressible C)- Positive inducible…
Q: How does exposing an E. coli cell to glucose affect the regulation of the lac operon via CAP? a.…
A: Catabolite activator protein (CAP) impacts the expression of the lac operon based on the catabolites…
Q: If tryptophan is presence in the culture media of E.coli then _________. the promoter will be…
A: This question is based on tryptophan operon. The trp operon is an operon-a group of genes that is…
Q: For an enzyme to be produced from an inducible operon, the repressor must bind to and digest the…
A: The operon is defined as a set of genes transcribed together and is regulated by one promoter. The…
Q: The lac operon has which of the following characteristics? O 1) usually requires an activator…
A: In Eukaryotes all genes are separate and produce individual mRNAs on transcription. However, in…
Q: Which Gene encodes for the Lac Repressor that binds on the Lac Operon Operator. O Lac Z gene O Lac Y…
A: The lactose operon (also known as the lac operon) is a set of genes that are specific for uptake and…
Q: If a researcher moves the operator to the far end of the operon, which of the following processes…
A: An operator is a genetic sequence that helps the DNA sequence to attach proteins in charge for…
Q: Under which of the following conditions would a lac operon produce the greatest amount of…
A: The “lactose operon” (lac operon) is the group of “3 structural genes” with a “single promoter.” It…
Q: In the lac operon, what kind of control is exhibited by the CRP-CAMP complex? O A. all these are…
A: The operon system constitutes the unit of gene expression that occurs in bacteria. It is a…
Q: Which of the following is true about the Lac operon? Group of answer choices An operon with a…
A: Operon is the cluster of genes found in DNA. It consists os regulatory gene, structural gene,…
Q: The tryptophan operon of E. coli represents an example of a gene regulatory system which is: a…
A: The trp operon, found in the bacterium Escherichia coli is a group of genes that encode biosynthetic…
Q: Under which of the following conditions will transcription of the lac operon occur?a) Lactose…
A: Introduction All the gene expressions are under high regulation and this is necessary to avoid…
Q: The DNA region below includes the lac operon. Identify all parts (by letter) that encode PROTEINS? P…
A: Lac operon is a group of genes with a single promoter that encodes proteins to transport lactose to…
Q: A transcription repressor results in a decrease in transcription of an operon. This is an example of…
A: The lac Operon is associated with Lactose metabolism. It comprises of the three structural genes -…
Q: Which of the following statements about the lactose operon in E. coli is TRUE? ) It contains the…
A: An operon is a functional unit of DNA (Deoxyribonucleic acid) containing a cluster of genes under…
Q: The lac operon is a negative inducible system and allolactose will bind to the regulator protein…
A: In normal state, the lac operon is generally turned off. A repressor protein during "off" stage,…
Q: In the lac operon, the product of structural gene lacz is capable of
A: Lac operon is a gene expression regulatory system that is responsible for the transport and…
Q: What would occur if the repressor of an inducible operon were mutated so it could not bind the…
A: The operon is the gene regulation system in prokaryotes that ultimately responsible for the…
Q: In the tryptophan operon of E. coli, what happens when tryptophan levels get too high? tryptophan…
A: A trp operon is a group of genes that are transcribed, together to code for the components for the…
Q: Under which of the following conditions would a lac operon produce the greatest amount of…
A: Lac operon is the operon which is part of the lactose metabolism present in the E. coli. Lac operon…
Q: True or false: When glucose and lactose are present, the lac operon will be highly expressed
A: The lac operon is a region of the DNA where the genes responsible for the utilization of lactose as…
Q: A mutation at the operator prevents the regulator protein from binding.What effect will this…
A: An operon is defined as a group of genes that have a common promoter and regulator and also…
Q: A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous…
A: In bacteria and their viruses, an operon is a genetic regulatory structure in which genes coding for…
Q: ill the Lac Operon be turned off or on if the allolactoase is
A:
Q: A mutation at the operator prevents the regulator protein from binding.What effect will this…
A: Inducible operon has proteins that bind to repress or activate transcription. It depends on the…
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- A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous transcription of the structural genes (b) no transcription of the structural genes (c) the binding of the repressor to the operator (d) no production of RNA polymerase (e) no difference in the rate of transcriptionThe molecules indicated below can be used experimentally due to their roles in relation to the expression of the lac operon. Drag the listed molecules to their corresponding bin. Reset Help ONPG IPTG X-Gal allolactose Dragable beta-galactosidase cleaves this molecule to form a visible yellow product. beta-galactosidase cleaves this molecule which then dimerizes to form a visible blue product. This molecule induces the transcription of the lac operon by inactivating the lac repressor.In the presence of lactose and the presence of glucose the lac operon is V [ Select ] Lacl is [ Select ] t. expressed at basal levels strongly expressed to the CAP binding site. not expressed
- Part A If E. coll bacteria are placed in an environment that contains both glucose and lactose, the regulation of the lac operon will allow which nutrient to be processed first? ONether will be processed in this environment O Both will be processed at the same time. Glucose O Not enough is known about the regulation of the lac operon to know which nutrient will be processed first Lactose Submit Request AnswerWhat would occur if the repressor of an inducible operon were mutated so it could not bind the operator? Build up of a substrate wihin the pathway controlled by the operon Continuous transcription of the operon's genes Irreversible binding of the repressor to the promoter Reduced transcription of the operon's genes O O O OWhat is the difference between negative and positive regulation in operon? Explain it with the help of lac operon.
- Select all of the cis-acting regulatory elements of the lac operon. Operator CAP+cAMP CAP+cAMP binding site LacZP₁0 ORF1 t₁ ORF2 ORF3 t₂ The diagram above illustrates an operon that is regulated by the RepR protein. O A small molecule, X, is needed to enable RepR to bind to the operator (O). When X is absent, which of the following statements is most accurate? O RNA polymerase binding to the P₁ promoter is unblocked Equal amounts of ORF1, ORF2, and ORF3 are made Expression of ORF2 and ORF3 is prevented by the terminator t₁ O Expression of ORF1, ORF2, and ORF3 is de- repressedWhich of the following lac operon genotypes would allow for functional versions of all the structural enzymes of the lac operon to be expressed constitutively even in the absence of lactose? Group of answer choices I+ O+ Z+ Y+ A+ I- O+ Z- Y- A- I+ OC Z+ Y+ A+ IS O+ Z+ Y+ A+ I+ O+ Z- Y+ A+
- When referring to attenuation in the regulation of the trp operon it would be safe to say that, when there are high levels of tryptophan available to the organism, ________. tryptophan inactivates the repressor protein translation termination of the trp operon is likely the trp operon is transcribed at relatively high levels the ribosomes stall during translation of the attenuator region transcription termination at the attenuator region is likelyMutations in the genes of the lac operon might affect the regulation of β-galactosidase synthesis. For each mutation listed below, indicating whether β-galactosidase would be regulated normally, always ON or always OFF. Mutation in operator site prevents repressor binding Mutation in lacIgene prevents repressor from binding operator Mutation in lacIgene prevents repressor from binding allolactose Nonsense mutation in lacZgenereIn the: Mutation of the regulatory region for a repressor protein in the lac operon. Explain: (a) What is the process affected? (b) What is the Effect on the process? (c) Does it affect prokaryotes, eukaryotes or both?