describe the actions of the normal and mutated lac operon in absence of lactose.use picture if possible step by step.
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: Describe the regulation of the lac operon when lactose is present and glucose is absent
A: In 1961, F. Jacob and J. Monod proposed the operon model to explain the genetic basis of enzyme…
Q: Explain how the lac operon is both positively and negativelycontrolled.
A: The lac operon of E. coli contains genes involved in lactose metabolism. It is expressed only when…
Q: Explain and give an example (trp operon) of how repressor operons function in prokaryotes.
A: Repressor binding physically blocks RNA polymerase from transcribing structural genes.
Q: Explain why catabolite repression is used in regulating the lac operon and describe how it…
A: An Operon is a unit of structure and function that consists of the clusters of regulatory genes…
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: If you add a co-eepressor to a repressor protein and that allows it to bind the operator is this a…
A: Inducible operon is one that is expressed in the presence of inducer. Constitutive operon is the…
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: Explain how glucose represses the lac operon.
A: Operons can be defined as the regions of DNA that contain the clusters of related genes. They are…
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: Which of the following is false when the genes of the Lac operon are being tran- scribed in high…
A: Lac operon is a set of genes used by E.coli to metabolize lactose when glucose is not available for…
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: Give the Evidence for the trp Operon ?
A: If tryptophan is available in the surrounding the E. coli (bacteria) will take it up and use it to…
Q: Compare and contrast the functional mechanism of the Inducible - Lac operon with the Repressible -…
A: Gene expression is a process in which the genetic instructions of genes are utilized to manage…
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: What is an operon? Explain an inducible operon.
A: In genetics, an operon is a functioning unit of DNA containing a cluster of genes under the control…
Q: Describe how a superantigen such as toxic shock syndrome toxin can become lethal.
A: Toxic shock syndrome results due to the bacterial infection caused by Staphylococcus aureus. It is…
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: 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: Explain the The Operon Model: Negative Control ?
A: The lac operon of E. coli contains genes involved in lactose metabolism. It is expressed only when…
Q: Describe the organization of the lac operon.
A: Step 1 Inducible Operon System (Lactose Operon) is a regulated operon system in which the structural…
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: Describe a bacterial operon's structural advantage.
A: *NOTE: Kindly repost for other question. Dear Student as per the guidelines we are supposed to…
Q: Explain the structure of Lac operon in bacteria.
A: Lactose is a beta-galactoside that E.coli use for energy and as a carbon source after it is broken…
Q: Refer to the lac operon image above to see the available choices. Which lettered item represents the…
A: A set of genes present in E.coli. that regulates the uptake of lactose from the surrounding…
Q: Describe the feature of lac operon?
A: The operon comprises the genes regulating a metabolic reaction. It is also an operon. It mainly…
Q: Describe the main features of the lactose operon and inducibleoperons.
A: Inducible operons are those in which genes for certain enzymes can be turned on by the substrate of…
Q: The transcription of many bacterial genes relies on functional groups called operons, such as the…
A: Turning/switching genes on and off is referred to as gene regulation. Cells start to take on…
Q: Outline the operon theory using the lac operon as anexample
A: Operon consists of genes placed in sequential order. Lac operon has following genes- Regulator gene…
Q: A scientist has discovered a strain of bacteria that can convert ethanol to pyruvate when stimulated…
A: Solution 1) The repressor of this operon is functional It is active when ethanol is absent and…
Q: Compare the arrangement of cis-acting sites in the control regions of the lac operon and phage λ
A: Bacteriophages are a vast group of viruses that have a diverse set of properties. Their genomes may…
Q: Explain how elements of the lac operon are exploited to regulate recombinant protein production in…
A: Introduction Three structural genes, as well as a promoter, a terminator, a regulator, and an…
Q: Lac operon explain in easy words
A: An operon is a genetic regulatory system that clusters genes coding for functionally related…
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: Briefly describe the lac operon and how it controls the metabolism of lactose.
A: In prokaryotes gene expression the gene expression occurs in a polycistronic manner. Polycistronic…
Q: Can you think for how long the lack operon would be expreesed in the presence of lactose?
A: Lac operon is an operon that regulates the breakdown of lactose present in the medium. It contains…
Q: Define lac operon and its structural gene with their function.
A:
Q: The lac operon is an inducible operon. What does this mean?
A: Operons are the groups of genes related to a single pathway and controlled by a single 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: Describe the advantages and disadvantages for organisms that arrange genes in operons.
A: Operons are regions of DNA that contain clusters of related genes and are made up of promoter…
Q: Explain and give an example (lac operon) of how inducer operons function in prokaryotes.
A: Prokaryote are organisms that lacks a distinct nucleus and other organelles due to the absence of…
Q: Define about lactose (lac) operon ?
A: The lactose operon also known as the lac operon is a set of genes that are specific for uptake and…
Q: In your own words describe in detail what happens at the lac operon in each of the following…
A: Gene regulation at the level of transcription in bacteria is achieved by the operon model. Operon…
Q: Explain what is Lactose operon and how does the system work .
A: The lactose operon also called as lac operon is a metabolism of lactose in E. coli in which operon…
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: Distinguish between positive and negative control. Give examples of each from the lac operon
A: Operator is a unit consisting of one or more cistrons that function coordinately under the control…
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: Which reaction normally happens in the regulation of the trp operon when high levels of tryptophan…
A: The trp repressor controls the trp operon. When coupled to tryptophan, the trp repressor prevents…
describe the actions of the normal and mutated lac operon in absence of lactose.use picture if possible step by step.
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Solved in 2 steps with 2 images
- Distinguish between positive and negative control. Give examples of each from the lac operonSupply the words “off" or “on" in the blanks below: In an inducible operon, transcription is normally and must be turned In a repressible operon, transcription is normally and must be turned Briefly describe the overall function of the structural genes in the lac operon. Briefly describe the overall function of the structural genes in the trp operon. For the following descriptions of the bacterial lac operon, determine if lactose is present (P) or absent (A). The repressor is bound to the operator. The repressor is inactive. RNA polymerase transcribes the structural genes. Allolactose is bound to the repressor For the following descriptions of the bacterial trp operon, determine if tryptophan levels are high (H) or low (L). The repressor is bound to the operator. The repressor is inactive. RNA polymerase transcribes the structural genes. Tryptophan is bound to the repressor.Explain the process of attenuation in the trp operon under the following conditions: (i) No tryptophan (ii) High tryptophan levels
- Draw the structure of lac operon and its action when the following conditions are prevailing in the media: increased glucose, low glucose, higher c-AMP, low c-AMP, higher glucose, and high c-AMP, low glucose and High c-AMP, Higher glucose and higher allolactoseIn terms of the trp operon, differentiate between two normal bacterial cultures, one grown in a medium supplied with tryptophan and the other medium without tryptophan.Illustrate simplified region (map) of the lac operon genes. Identify the genes present in this region.
- Which 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+Explain the process of attenuation of the trp operon under high tryptophan levels.Predict the effect on the activity of the lac operon of a mutation that disrupts the function of: a) the cap gene, which encodes the CAP protein. b) the CAP-binding site.
- Describe the mechanism by which cAMP receptorprotein (CRP), the regulatory protein for catabolite repression, functions. Use the lactose operon as an example.By using separate labelled diagrams, describe as detail as possile the actions of the normal and mutated lac operon in absence of lactose.Consider this strain of E. coli with lac operon alleles: IS pt o* z* y+ /T p* oCz- Y+ In a written response, briefly explain if beta-galactosidase AND permease will be expressed, and if so, will they be inducible or constitutive.