In the ara operon in E. coli cells, AraC will bind to its specific target DNA when O a. when there is no glucose in cells. O b. it does not bind arabinose O c. it binds arabinose Od. it binds allolactose.
Q: Match the key complex or product to its related process of regulating gene expresSion. a.…
A: Operon is a functional unit of DNA. It contains a cluster of genes transcribed in mRNA and…
Q: What is the effect of high levels of glucose on the lac operon?a. Transcription is stimulated.b.…
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Q: Pick six “partial diploid” lac operon problems from the lac operon practice sheet. (Those are the…
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A: In tryptophan operon there are four sequence sequence 1, 2, 3 and 4. There are two sequences that…
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: If tryptophan is absent from the environment of E.coli, the trp operon will be _______ A) mutated…
A: trp operon It is defined as a group of genes which encode the biosynthetic enzymes for the…
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A: The protein synthesis process is started from the operon region that is actually worked as a switch.…
Q: Operons______ . a. only occur in bacteria b. include multiple genes c. involve selective gene…
A: The correct answer is (b) include multiple genes
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: If lactose and glucose are provided in the growth medium of a culture of E. coli, then a. Both…
A: Introduction: The correct choice is option d. Lac operon is repressed
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A: Lac and Trp operon are found in E. coli and other bacteria.
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A: Lac operon is studied extensively by using mutant strains of E.coli. It is studied under the domain…
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: Similar to the Lac operon, the Ara (arabinose) operon genes are most highly expressed when Both…
A: Similar to the Lac operon, the Ara (arabinose) operon genes are most highly expressed when Cyclic…
Q: Components necessary for regulating the /trp/ operon do NOT include
A: Answer - Option E - CAP protein
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: Complete the diagrams below to reflect the proteins and any relevant cofactors (e.g. -…
A: Exergonic reactions have negative free energy change Where are endergonic reactions have positive…
Q: Which of these BEST DESCRIBE tryptophan in the Trp Operon? A. Acts as a corepressor B. Acts as a…
A: An operon is a unit of genetic material that functions in a coordinated manner through the use of an…
Q: I. CAP-CAMP complex binds to the operator locus blocking the RNA polymerase. II. In the presence of…
A: The lactose operon (also known as the lac operon) is a set of genes that are specific for uptake and…
Q: Consider a mutant of E. coli that has an inactivating mutation in the gene for adenylate cyclase…
A: Introduction :- Inactivating mutations, also known as loss-of-function mutations, cause the gene…
Q: Explain how an inducible operon is regulated (make sure you include an explanation of how the CAP…
A: An operon is a sequence of bases encoding one or more polypeptides, as well as the promoter and…
Q: The presence of lactose in E.coli triggers the transcription of Lactose Operon. O True O False
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Q: High levels of transcription of the lactose operon require all of the following, EXCEPT: A) O the…
A: Lac operon is a gene regulatory mechanism associated with bacterial species while using lactose for…
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: 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: 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: An operon that encodes enzymes that degrade ampicilin is most likely __________ . A) inducible B)…
A: Option A and B are the answer. An operon that encodes enzymes that degrade ampicilin is most likely…
Q: A low level of expression of lac operon occurs at all the time.can you explain the logic behid this…
A: The operon is the group of genes controlled by shared protein. Operons have multiple genes with…
Q: In the trp operon, tryptophan is best characterized as being a: A. repressor B. inducer C.…
A: Operon is clustered of Genes where a single mRNA consists of more than one functional gene.It is…
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A: The operon concept can be defined as a DNA containing a set of genes that are transcribed basically…
Q: Why do eukaryotic cells not have a lac operon? A. Eukaryotic cells cannot transcribe multiple genes…
A: Lac operon is a gene regulating unit present in prokaryotes. It consists of a promoter, repressor,…
Q: In the lac operon, regulation of gene expression by CAP-CAMP is a type of O a. positive repressible…
A: Lac operon can be defined as the set of constitutive genes with a single promoter that encodes for…
Q: In the lac and trp operons, the repressors are said to be "allosteric molecules" because they…
A: Operons are regions present in DNA which are composed of related genes.Operons are generally found…
Q: According to the operon hypothesis, the Z and Y genes of E. coli are classified as structural genes,…
A: The Lac Operon is responsible for Lactose metabolism and transport in E.coli. This operon consists…
Q: Say you have an operon called the CAKE operon, it contains genes for the enzymes require to convert…
A: An operon consists of a set of genes regulated by a single promoter. The products of these genes are…
Q: The absence of tryptophan (trp) in E. coli A) O produces an inactive trp repressor B) O causes…
A: The gene regulation in prokaryotes (E. coli) is controlled by operon system. On operon system…
Q: Strain P77 has a mutation in the lacO that prevents it from being bound by the lacI protein.…
A: Gene regulation at the level of transcription in bacteria is achieved by the operon model. Operon…
Q: Consider a mutant of E. coli that has an inactivating mutation in the gene for adenylate cyclase…
A: Introduction The lactose operon (also known as the lac operon) is a group of genes present in E.…
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: If a researcher moves the promoter for the lac operon to the region between the beta galactosidase…
A: Since you have asked multiple question, we will solve the first question for you. If you want any…
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A: Bacterial transformation is the process where a competent bacterial cell picks up foreign DNA from…
Q: Consider a hypothetical operon for alanine degradation. Alanine would most likely influence the…
A: Alanine is an amino acid that is catabolized in the enzymatic processes.
Q: Say you have an operon called the CAKE operon, it contains genes for the enzymes require to convert…
A: The operon model is considered as a cluster of functional genes that are activated in response to…
Q: 1) A. What is the difference between a repressible vs, an inducible operon? B. Using diagrams…
A: The answer is given below
Q: Consider this strain of E. coli with lac operon alleles: IS pt o+ z+ Y+ /I p* oCz- Y+ In a written…
A: Lac Operon is the segment of DNA which includes regulatory gene, promoter gene, operator gene and…
Q: 3.1 Which of the following is NOT true about the lac operon? I) The lac operon is use to help…
A: ANSWER;- B) is NOT true about the lac operon. Allolactose binds to the repressor so they can bind…
Q: For a lac operon of genotype PPO*Z* , functional beta-galactosidase is ... (pick the best answer)…
A: Hi, Thanks For Your Question. Answer : Correct Option Is A (Never produced). I Gene Encodes For…
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- If tryptophan is absent from the environment of E.coli, the trp operon will be _______ A) mutated B) activated, but only partially C) activated D) repressedIf glucose is absent, but lactose is available, the lac operon will be _______ A. activated B. repressed C. activated, but only partially D. mutatedWhy do eukaryotic cells not have a lac operon? A. Eukaryotic cells cannot transcribe multiple genes under one promoter B. Eukaryotic cells dont have repressors C. They can always metabolize lactose
- The effect that allolactose has on LacI is a. causing it to block binding of the CAP protein. b. causing it to change shape so that it cannot bind to DNA. c. causing it to not be expressed anymore. d. causing it to help RNA polymerase to bind.A drug inhibits positive regulation of an operon. What is the most likely outcome? a. No mRNA transcription. b. Inhibition of the operon. c. Only a small amount of the protein will be synthesized. d. a and b e. a, b, and c asap , typed onlyd. 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 activator
- The gad operon is controlled by a number of transcription factors that regulate a promoter of approximately 450bp. Which would NOT explain why bacterial promoters are shorter than the typical eukaryotic promoter? a. Bacteria do not have nucleosomes b. Bacteria do not have mediator complex c. Each operon is regulated by only one signal d. All of the above are trueStrain ROFL4 has a premature stop mutation in the lacZ gene, resulting in a nonfunctional b-galactosidase. Otherwise all other parts of the operon are functional. Circle the least number of components for an F' plasmid that will restore normal regulation and function of the lac operon in the resulting partial diploid. (may need more than one) (a) lacI+ (b) lacO+ (c) lacP+ (d) lacZ+ (e) None, cannot be restored.What would occur if the repressor of an inducible operon weremutated so it could not bind the operator?(A) irreversible binding of the repressor to the promoter(B) reduced transcription of the operon’s genes(C) buildup of a substrate for the pathway controlled by theoperon(D) continuous transcription of the operon’s genes
- in E.coli, high glucose levels reduce cyclic AMP (cAMP) levels which then ______ transcription of the lactose operon. a. does NOT change b. decreases c. increasesOperons A. Draw a schematic of the lac operon when glucose is low and lactose is high in the cell’s environment. B. Draw a schematic of the trp operon when tryptophan levels in the environment are low. C. What is the lux operon and how is affected by quorum sensing?In the trp operon, if a mutation occurred in the gene for the repressor so that it could bind to the operator even in the absence of tryptophan____________. a) the inducer cannot bind trpO, so operon gene transcription occurs b) the active repressor cannot bind trpO, so operon gene transcription is attenuated c)the active repressor binds tpO, so operon gene transcription is always repressed d) the repressor binds the corepressor, and operon gene transcription occurs.
