lacZ isn't expressed, in the presence and absence of glucose and lactose. What components of the lac operon could be mutated to produce this phenotype? all possibilities must be listed.
Q: In the lac operon system, do the inducers act at the transcription or translation level? Explain why…
A: The lactose operon (lac operon) consists of a regulatory gene (i-gene) and three structural genes -…
Q: If an abnormal repressor protein could still bind allolactose but the binding of allolactose did not…
A: The Lac operon contains genes responsible for the transportation and breakdown of lactose. These…
Q: If an abnormal repressor protein could still bind allolactose but the binding of allolactose did not…
A: Operon acts as a single regulated unit having one or more structural genes, promoter gene, a…
Q: Would a mutation that inactivated lac repressor and prevented it from binding to the lac operator…
A: The negative regulation of the lac operon is done by a repressor, which is a product of the lacI…
Q: Please describe in full detail how the LAC operon is controlled by both negative gene regulation and…
A: Lac operon is a gene controlling nit which contains operator, promotor and structural gene region.…
Q: Please help me iwht this question explain how the regulation of the Lac Operon incorporate both…
A: An operon includes a group of genes that are expressed under the same promoter.
Q: Operon X produces three enzymes that convert Compound A to Compound B. The R gene makes the…
A: Gene expression is given on the basis of RNA. It is a process through which there is turning on of…
Q: a mutation that leads to a nonfunctional adenylate cyclase enzyme would lead to what expression…
A: A mutation is a change in the genetic material (the genome) of a cell of a live creature or a virus…
Q: Describe the binding of RNA polymerase, repressors, andactivators to the lac operon when both…
A: The lac operon is a group of genes which has a single promoter and the genes in this operon codes…
Q: Regulation of the E. coli trp operon by attenuation requires the trp repressor protein. prevents…
A: An operon is a function unit of DNA containing a set of genes including structural gene, a…
Q: In the lac operon, how would gene expression be affected if each one of the following segments was…
A: The lac operon is basically a group of genes with a single promoter whose genes encode proteins that…
Q: The attenuation mechanism that helps block expression of the tryptophan operon requires all of the…
A: In transcriptional attenuation, the expression of genes are negatively regulated by controlling the…
Q: A bacterial cell is mutated and cannot create the repressor protein associated with the Lac operon.…
A: Lac operon is associated with uptake and metabolism of lactose. It has several components such as a…
Q: Which of the following arabinose operon regulatory sites is exclusively involved in the repression…
A: Hi, Thanks For Your Question. Answer : Correct Option Is Ara O2.
Q: Why is the TRP operon considered a repressible operon, while the LAC operon is considered an…
A: Operons are areas of DNA which are composed of cluster of related genes which are controlled by…
Q: If an abnormal repressor protein could still bind allolactose, but thebinding of allolactose did not…
A: Deoxyribonucleic acid is a particle made out of two polynucleotide chains that loop around one…
Q: If there was a mutation such that the lac I protein could no longer bind lactose, but could still…
A: Lac operon is responsible for the metabolism of lactose in bacteria.
Q: you have a cell that carries mutations in the lac operon repressor gene that render it unable to…
A: The simple concept behind the action of the lac repressor gene is to bind to the lac operon operator…
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: If glucose is absent, but lactose is available, the lac operon will be _____
A: “Operons” are systems of “gene regulation” of various bacteria and viruses. They control the…
Q: An E. coli cell acquires a mutation in the gene that encodes CAP. The mutation affects the…
A: The transcription is a process through which information in the DNA molecule is transcribed into…
Q: ptoph had a mutation on the repressor, not allowing it to bind with tryptophan. The repressor is…
A: Operons are proteins encoded together as a block that performs specific functions and are involved…
Q: A mutation prevents the catabolite activator protein (CAP) from binding to the promoter in the lac…
A: Mutation means sudden changes occur in DNA sequences. The mutation occurs randomly. It also occurs…
Q: Mutation in the regulatory gene in the lac operon results in the formation of an inactive repressor.…
A: The lac operon is an operon, or group of genes with a single promoter.The genes in the operon encode…
Q: The lac operon consists of three structural genes, lacZ, lacY and lacA that are transcribed as a…
A:
Q: The lac operon consists of the control elements and _____________ that code for the enzymes of…
A: The regulatory mechanism of operon responsible for the utilization of lactose as a carbon source is…
Q: What is the phenotype of an E. coli strain with a mutation in the lac operator that allows the lac…
A: Operon is defined as a region of DNA where it is made up of clusters of related genes arranged under…
Q: One way that regulation is often studied is by examining the effects of mute ons. For example,…
A: There are two types of lac mutations occurring in lac operon: 1. uninducible - operon can't be…
Q: . Mutants were isolated in which the constitutive phenotype of a missense lacI mutation was…
A: In an experiment, the mutants were isolated in which the constitutive phenotype of a missense lacI…
Q: The lac operon consists of regulatory regions such as the promoter as well as the structural genes…
A: Lac operon is an inducible type of operon system takes place in prokaryotes like E.coli in which…
Q: What experimental results would indicate that the mutation lacISlacIS is dominant to lacI+lacI+?…
A: The correct option is (e) i.e, In lacISlacIS/lacI+lacI+ partial diploids, the lac operon is in a…
Q: Bacteria with a lac phenotype are unable to use lactose because of some defect in expressing the…
A: Answers - 1) False 2) True 3) True There are 3 structural genes in lac operon - lac Z, lac Y and…
Q: Under the following conditions, what will be occurring with the lac operon? Glucose: Present…
A: lac operon is present in E.coli and contain genes that control lactose metabolism and only active…
Q: If you make a large deletion in the lac operon to remove the operator region, will the structural…
A: Lac operpon Is an operon or a group of genes with a single promoter that encode genes for the…
Q: The lac operon regulates expression of genes required for the breakdown of lactose. Use the…
A: The lac operon regulates the expression of genes required for the breakdown of lactose through a…
Q: ac operon. Drag the listed molecules to their corresponding bin. Reset Help ONPG IPTG X-Gal…
A: ONPG - beta-galactosidase cleaves this molecule to form a visible yellow product. Explaination: The…
Q: Indicate what protein(s) will bind the DNA in the lac regulatory region of E. coli given the…
A: 1. When lactose as well as glucose are absent then no transcription will take place. The lac operon…
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: Explain how the following conditions will affect the regulation of the operon. (3 pts) Low cAMP…
A: Lac operon is a mechanism seen in the E coli that enables the proper metabolism in its body. The…
Q: Indicate what protein(s) will bind the DNA in the lac regulatory region of E. coli given the…
A: An operon can be defined as a unit of bacterial gene expression and its regulation.It consist of…
Q: For each of the growth conditions listed, what proteins would be bound to the lac operon? (Do not…
A: An operon consists of many related genes that are regulated by a common operator. The multiple genes…
Q: High levels of glucose in the environment result in low levels of transcription of the lac operon.…
A: The lactose operon (lac operon) is an operon needed for the transport and digestion of lactose in…
Q: You have an E.coli strain in which the lac operon is not expressed when glucose is absent and lacto…
A: The lactose operon (also known as the lac operon) is a group of genes present in E. coli and other…
Q: Give all possible genotypes of a lac operon that produces, or fails to produce, B-galactosidase and…
A: The diagrammatic representation of lac operon is given below: -
Q: Please explain the structure of Lac operon in bacteria.
A: Gene regulation can be defined as any kind of alteration in the gene to give rise to a different…
Q: In the lac operon, the lacZ gene codes for an enzyme called ____________, which catalyze the…
A: 1st blank: beta-galactosidase 2nd blank: Lactose
Q: In the: Mutation of the regulatory region for a repressor protein in the lac operon. Explain: (a)…
A: Operon It is a set of multiple gene that is controlled by single operator.
Q: Why do scientists define the trp operon as repressible and the lac operon as inducible?
A: Operon is a combination of genes that are transcribed by the same promoter.
Q: An E. coli cell as the following genotype for the lac operon system: I- OC Z+ / F’ I+. Which term…
A: The presence I+ repressor is dominant to the absence of a repressor I-. Oc mutants:- these are the…
lacZ isn't expressed, in the presence and absence of glucose and lactose. What components of the lac operon could be mutated to produce this
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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 transcriptionIf glucose is not available, but lactose is available from the environment, what is the status of transcription of the lac operon genes? Explain your answer from both an evolutionary perspective and in terms of negative and positive regulation of the operon?Under what conditions would you expect to see high levels of expression of the structural genes in the lac operon? Group of answer choices Lactose is absent and glucose is absent Lactose is absent and glucose is present Lactose is present and glucose is present None of these Lactose is present and glucose is absent
- If glucose levels in the cell are high and lactose is available from the environment, what is the status of transcription of the lac operon genes? Explain your answer from both an evolutionary perspective and in terms of negative and positive regulation of the operon?What would happen if the operator sequence of the lac operon contained a mutation that prevented the repressor protein from binding the operator? (Explain what would happen both in the presence and absence of lactose)Mutants were isolated in which the constitutive phenotype of a missense lacl mutation was suppressed. That is, the operon was now inducible. These suppressor mutations mapped to the operon, not to the lacl gene. What could these mutations be?
- In the lac operon system, do the inducers act at the transcription or translation level? Explain why it acts in that level in a short but concise way.. Mutants were isolated in which the constitutive phenotype of a missense lacI mutation was suppressed.That is, the operon was now inducible. These suppressor mutations mapped to the operon, not to the lacIgene. What could these mutations be?In most experiments using the lac operon, researchers use the synthetic inducer IPTG to turn on operon expression, instead of lactose or allolactose. What do you think is the advantage of using IPTG?
- The lac operon consists of regulatory regions such as the promoter as well as the structural genes lacZ, lacY, and lacA, which code for proteins involved in lactose metabolism. What would be the outcome of a mutation in lacA?The lac operon produces enzymes that allow the bacteria E. coli to metabolize lactose, it is in an inducable operon. When lactose is present, will the repressor protein attach or leave the operon? How would this effect the production of lactose producing enzymes?The symbols A, B, C, D, E represent all the components of the lac operon, excluding LacA. The symbols are not in the order of the lac operon. Minus and plus signs represent activity of lacZ or LacY in the absence or presence of IPTG. LacI+ or LacI-, and LacO+ or LacOC alleles were used. Which of the symbols represents each of the lac operon components?