In the lac operon, regulation of gene expression by CAP-CAMP is a type of O a. positive repressible O b. Negative inducible O c. positive inducible O d. negative repressible
Q: The tryptophan operon is usually in the _______position and is inhibited by a/an_______ molecule.
A: Answer: TRYPTOPHAN = It is an essential amino acid which is not readily synthesized by humans, we…
Q: What is the effect of high levels of glucose on the lac operon?a. Transcription is stimulated.b.…
A: An operon is found in bacteria and viruses as a genetic regulatory system. The gene coding for…
Q: Study the depiction of the lac operon in Figure 11.2. Normally, the genes are turned off when…
A: The lac operon contains three genes: lacZ, lacY, and lacA. These genes are transcribed as a single…
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: 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: As trytophan levels increase in the cell, _____ bind(s) to active aporepressors, causing ______ of…
A: trp operon: The trp operon codes for the components required for tryptophan production. An operon…
Q: What is an operon?a. A site in the DNA where a regulatory protein bindsb. A group of genes under the…
A: Genetics is the investigation of heredity. Heredity is a natural interaction whereby a parent passes…
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: 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: 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: Predict the effect on the activity of the lac operon of a mutation that disrupts the function of: a)…
A: The Catabolic Activator Protein (CAP) is a protein which acts as a positive regulating factor for…
Q: E. coli has five genes that code for enzymes that make tryptophan. These genes are regulated by a…
A: When a group of related genes exist under the control of a single promoter, it is referred to as an…
Q: An operon a. is regulated by a repressor binding at the promoter. b. has structural genes that are…
A: When the RNA polymerase binds to the promoter, the operon is transcribed and some mRNAs are…
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: 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…
Q: What is an operon? a. A site in the DNA where a regulatory protein binds b. A group of genes under…
A: Regulation of gene expression refers to a really broad term that will occur bat varied levels.…
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: 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: How does the lac operon regulate lactose digestion in bacteria?a. The repressor protein becomes a…
A: The lac operon of E. coli contains genes concerned with lactose metabolism. It's expressed only if…
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: 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: 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: In a bacterial operon, the active repressor bind to the A. promoter. B. terminator. C.…
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: 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: 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: 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: give an example of an operon that is under negative control e. repressor f. give an example…
A: Operon is a controlling unit ab gene expression in prokaryotes. Examples of Prawns are Lac Operon…
Q: . If a particular operon encodes enzymes for makingan essential amino acid and is regulated like…
A: An operon is a functional unit of DNA (Deoxyribonucleic acid) including a gene clusters under the…
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: dỗ the lác, trp repressor and CAP protein have in common? O They have a Helix-Turn-Helix Motif O…
A: Bacteria employ polycistronic expression of genes. The genes are arranged as a unit called an…
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 lac operon is usually in the ________ position and is activatedby a/an ________ molecule.a. on,…
A: An operon is a group of genes, which have a common regulator and promoter and also transcribed as a…
Q: A mutation occurs in the lac operon operator site such that LacI can no longer bind to the operator…
A: Lac I stands for lac inhibitor. It's major function is to turn off the lac operon in the absence of…
Q: In the trp operon, if a mutation occurred in the gene for the repressor so that it could bind to the…
A: Bacteria like Escherichia coli (a friendly gut bacterium) require amino acids to survive since they,…
Q: Which of the following is characteristic of genes and gene regulation in both bacteria and…
A: Genes are generally defined as the way that they are been collections of nucleotides that code for a…
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: In the txp operon, a repressor protein acquires a mutation such that it cannot bind to tryptophan.…
A: BASIC INFORMATION TRYPTOPHAN OPERON This system is known as Repressible Operon System. It can also…
Q: Catabolite activating factor (CAP) senses and the…
A: E.coli and other bacteria metabolize glucose preferentially even in presence of lactose and other…
Q: You are growing E. coli in a laboratory in order to study their operons. The growth media you are…
A: The bacterial gene transcription is regulated by the operon system that regulates the expression of…
Q: n prokaryotes, the sigma factor recognizes base sequences in the which facilitates RNA polymerase…
A: Sigma factors play a key role in the regulation of gene expression in response to changing…
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: The regulator protein that acts on a negative repressible operon is synthesized as a. an active…
A: Operons consist of multiple structural genes grouped together with a promoter and an operator along…
Q: What is RNA polymerase doing on the lac operon in the presence of lactose? it is inactive and not…
A: In 1961, Jacob and Monod formulated the operon model in bacteria (E.coli) to know how the regulation…
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: ill the Lac Operon be turned off or on if the allolactoase is
A:
Q: In the ara operon in E. coli cells, AraC will bind to its specific target DNA when O a. when there…
A: AraC protein can shift from the state of its preference to loop DNA (when arabinose is absent) to…
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- Binding of _______ to _______ in DNA can increase the rate of transcription of specific genes. a. activators; repressors c. repressors; operators b. activators; enhancers d. repressors; enhancersA mutation occurs in the lac operon operator site such that LacI can no longer bind to the operator site. The effect that this mutation has on the cell is that a. the activity of the lac operon will not be affected. b. the cell can no longer convert lactose to glucose. c. the expression of the lac genes cannot be turned off. d. the expression of the lac genes cannot be turned on.In a bacterial operon, the active repressor bind to the A. promoter. B. terminator. C. operator. D. regulator.
- Which will be bound to the Lac Operon in an environment with lactose and glucose? A) both repressor and CAP B) repressor only C) CAP only D) neither repressor nor CAPA 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 onlyWhat 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 the lac operon, the lac genes are transcribed in the presence of lactose because a RNA polymerase binds to the operator b The repressor can not bind the promoter c Production of the repressor protein is inducible d The inducer binds to the repressor e The inducer binds to the operatorAn operon that encodes enzymes that degrade ampicilin is most likely __________ . A) inducible B) under positive control C) under negative control D) repressible E) controlled by CAPIn the txp operon, a repressor protein acquires a mutation such that it cannot bind to tryptophan. What will be the effect on the trp operon? 1. turned off permanently 2. turned on permanenty 3. constitutive4. a and c5. b and c
- The lac operon is usually in the ________ position and is activatedby a/an ________ molecule.a. on, repressor b. off, inducer c. on, inducer d. off, repressorWhen tryptophan levels in the cell are low A the trp repressor will be bound and the operon transcribed B the trp repressor will not be bound and the operon transcribed C the trp repressor will not be bound and the operon not transcribed D none of the aboveIf lactose and glucose are provided in the growth medium of a culture of E. coli, then a. Both lactose and glucose are metabolized at same rate. b. Lactose metabolism is favored. c. CAMP-CAP complex binds CAP site. d. Lac Operon is repressed. e. Adenylate cyclase is activated.
