1. (a) Lactose levels are high Lac Operon Genes are switched OFF Lac Operon Genes are switched ON Does NOT affect the gene expression (b) Enhancer and activator proteins are working together Gene is switched ON Gene is switched OFF Does NOT affect the gene expression

Q: Model 1: What conditions would need to be present in the cell in order to reverse the regulatory…

A: The operon is the system that explains the regulation of gene expression in terms of switching “on”…

Q: Assuming that the level of glucose is low, a mutation in the repressor associated with the lac…

A: The lac operon stands for lactose operon. These are a set of genes that are found in E.coli and…

Q: In the presence of molecule A, what functional structural proteins are produced from the operon? 0…

A: The correct answers are option d. test1, e. test2 and f. test3. In the presence of molecule A, the…

Q: A researcher was trying to determine whether two molecules (molecule A and molecule B) were co-…

A: CoRepressor - The function of the corepressor is to induce transcriptional silencing or to repress…

Q: Binding of transcription activator protein     Gene is switched ON     Gene is switched OFF…

A: Transcription is a process by which information of DNA segment is copied into the mRNA and it is…

Q: Operons can not be:   a. Negatively regulated b. Positively regulated c. Constitutive d. Inducible…

A: The workhorses of a body are proteins. All or every function of the body are carried out by the…

Q: P₁0 ORF1 t₁ ORF2 ORF3 t₂ The diagram above illustrates an operon that is regulated by the RepR…

A: An operon is a group of genes and the regulatory elements that regulate the expression of those…

Q: Which of the following is TRUE about attenuation?

A: In genetics, attenuation is a proposed mechanism of control in some bacterial operons which results…

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: If lactose isn't present in the environment of an E. coli, what is the state of the lac operon? O a.…

A: The lactose operon (also known as the lac operon) is a group of genes present in E. coli and other…

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: Operons are clusters of genes that are regulated as a group. They can be characterized as either…

A: Operon  Operon is the collection or group of structural genes that is controlled by one promoter.…

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: eron ns are only produced certain molecules are und in the cell. eron = are only read when molecules…

A: Positive genetic regulation refers to the type of regulation mechanism that enables the expression…

Q: Transformation is the process where bacteria take up a plasmid from the surrounding and then express…

A: Arabinose acts as an allosteric regulator of AraC, affecting which DNA sites it binds to and how the…

Q: lactose a. Activation CAP lac I repressor allolactose b. Repression CAP lac I repressor CAMP с CAMP…

A: Lac operon consists of the cluster of genes. The letters depicted in the lac operon below are as…

Q: You identify a mutant that affects lac operon expression. You decide to investigate this mutant…

A: The concept of transcriptional regulation refers to the mechanisms by which cells control the…

Q: 3. Draw an anabolic operon with three biosynthetic genes for compound Q and a catabolic operon with…

A:

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: When does the trp operon allow its gene to be read? * when tryptophan is not present when lactose is…

A: Gene regulation is an important phenomenon among the prokaryotic cell as well as among the…

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: Which of the below conditions would result in the lowest level of expression from the lac operon…

A: Option C is correct :

Q: You are studying the ABCD operon from a newly isolated bacterium. Which of the following would…

A: A Operon consists of segments of DNA , which carry codes for the synthesis of proteins. These genes…

Q: For that same genotype: In the presence of molecule A, what functional structural proteins are…

A: Introduction Gene is a functional unit of DNA. It carries all the information of a organism. Gene…

Q: This figure represents the ABC operon, which is a negative inducible operon, and its associated…

A: ANSWER: Functional structural proteins formed in the presence of molecule A are: test 1, test 2 and…

Q: A partial diploid of the ABC operon is generated by combining the previous genotypes, resulting in…

A: A partial diploid bacterium has a plasmid that contains some additional genes. The genes are present…

Q: Lac operon regulation under allolactose functions under____________ control; trp operon regulation…

A: Operon is the segment of DNA which includes regulatory gene, promoter gene, operator gene and…

Q: What statement is NOT true regarding transcription attenuation of amino acid biosynthetic operons?…

A: Amino acid biosynthesis is an anabolic process in which a molecule is synthesized as an end product.…

Q: Provide the SIGNIFICANT differences between the following

A: The process by which a cell regulates the conversion of DNA to RNA (transcription) and hence…

Q: The role of allolactose in the lac operon

A: Lac Operon:This is a classic example of a gene regulation system found in E. coli.The key…

Q: An operon is a group of genes under the control of a single promoter. Match each type of operon with…

A: The Inducible operon - Under the  default conditions , the transcription is the  inhibited.it is…

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: 2. The promoter (P) is the start site of transcription through the binding of RNA polymerase before…

A: The lac operon: The lac operon or the lactose operon is the most widely studied gene with respect to…

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: 1. (a)  Binding of inducer protein to repressor protein     Gene is switched ON     Gene is…

A: Gene regulation is done with the help of the regulatory protein binding with the regulatory sequence…

Q: Read the following statements about operons, and mark the FALSE one. O a. Prokaryotes use operons…

A: Operons are a group of genes that are regulated together in prokaryotic cells. They consist of…

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: What is the function of cAMP in regulation of the lac operon? Group of answer choices it activates a…

A: The lac operon seems to be an inducible operon that uses lactose as a source of energy and is active…

Q: the lac operon, the lac genes are transcribed in the presence of lactose because   a RNA polymerase…

A: Reasons:  A.RNA polymerase binds to the operator RNA polymerase binds to the promoter region with…

Q: For that same genotype: In the presence of molecule A, what functional structural proteins are…

A: Gene is a functional unit of DNA. It carries all the information of a organism. Gene expression can…

Q: Given the Table below concerning the lac operon, match the letter with what would be occurring for…

A: The lac operon is a genetic system found in bacteria, such as E. coli, that regulates the expression…

Q: a) Tryptophan-repressor complex binds to operator     Gene is switched ON     Gene is switched OFF…

A: The tryptophan operon , required for the synthesis of the amino acid tryptophan, is an example of a…

Q: The lac operon produces: (choose the best answer) O A single mRNA molecule O A single protein O A…

A: Transcription: It is the process through which the enzyme RNA Polymerase transfers information from…