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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- 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 transcriptionWhich of the following is characteristic of genes and gene regulation in both bacteria and eukaryotes? (a) promoters (b) non-coding DNA within coding sequences (c) enhancers (d) operons (e) DNA located in a nucleuscompare and contrast the regulation of the lac operon and the trp operon.
- Define the following in the context of operons: a. positive control b. give an example of an operon that is under positive control c. negative control d. give an example of an operon that is under negative control e. repressor f. give an example of a repressor molecule g. activator h. give an example of an activatorOperons involved with the biosynthesis of molecules such as amino acids are most likely to be regulated in which of the following ways? a. The product of the biosynthetic pathway represses transcription. b. The product of the biosynthetic pathway activates transcription. c. A precursor of the biosynthetic pathway represses transcription. d. A precursor of the biosynthetic pathway activates transcription.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
- Compare and contrast the roles of a corepressor and an inducer innegative regulation of an 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.What is the regulatory region of the Trp operon that is involved in alternative transcription termination mechanism? Choose from the options below. Attenuator Promoter Leader sequence Repressor Operator
- Provide the SIGNIFICANT differences between the following Operon Systems Inducer / Lac Repressor / Trp Regulation of Transcription Activators Repressors 3. Regulation AFTER transcription MRNA processing miRNAs 4. Types of Genes Facultative ConstitutiveIf 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?If you add a co-eepressor to a repressor protein and that allows it to bind the operator is this a inducible, constitutive or repressible operon?