4a. The diagram below represents (a) the lac operon in the OFF state and (b) lac operon in the ON state. Assign labels to letters A-F based on known components in the pathway. The lac operon Орeron А. A B a) Absence of lactose Regulator Structural genes gene (lacl) lacZ lacY lacA В. Transcription and translation No transcription С. D. Е. b) Presence of lactose B F. Transcription and translation Transcription and translation Enzymes Permease Transacetylase Glucose B-Galactosidase Galactose Lactose 4b. Briefly describe the changes in gene expression that happen in the lac operon when lactose is present in the cell. Include changes in the action of RNA polymerase and the lac repressor protein.

Q: A mutant strain has a defective lac operator site that results in theconstitutive expression of the…

A: Lac operon is a set of three genes present in bacteria and the genes are responsible for…

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: The diagram below represents a hypothetical operon in the bacterium E. coli. The operon consists of…

A: Operon  Operon is a place within the DNA which have several gene and all these genes are controlled…

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: Suppose that you have isolated a mutant strain of E. coli inwhich the lac operon is constitutively…

A: Microbiology is the study of microorganisms that are invisible to the naked eye. The microorganisms…

Q: 5g. A mutation has occurred rendering the regulatory protein unable to recognize the operator…

A: Operons are groups of genes involved in regulating a process and are transcribed as a single mRNA.…

Q: describe the actions of the normal and mutated lac operon in absence of lactose

A: The Lac operon is a group of genes with a  single promoter. It takes place in prokaryotes(bacteria).…

Q: Utilizing lactose operon, how can we explain how induction controls enzyme synthesis 2. Use…

A: An operon is a group of genes that code for proteins that are involved in a single cellular…

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: How does induction control enzyme synthesis using lactose operon?  2. Describe how level of a key…

A: By controlling the transcription of the mRNA which is needed for the enzyme synthesis, the genetic…

Q: 1. Complete the following table based on your lac operon simulations. Absence of lactose Presence of…

A: An operon is a group of genes that are transcribed at the same time. The lac operon consists of…

Q: b) A haploid E. coli strain cultured in a lactose containing medium failed to transcribe the genes…

A: An operon is a gene expression and regulation unit of the bacteria that consists of the following…

Q: what is an attenuator? (in context of a prokaryotic operon )

A: Operons are prokaryotic arrangements of multiple genes under the control of a single promoter. The…

Q: The genes shown are from the lac operon system of E.coli. The symbols a, b and c represent the…

A:

Q: For the given genotypes (associated with the lac operon in E. coli), indicate with a "+" or "-"…

A: The lactose operon is an example of inducible operon in which the presence of lactose is responsible…

Q: a. The original constitutive operator mutations in thelac operon were all base changes in o1. Why…

A: The original constitutive operator mutations made in the lac operon involved base changes in the O1.…

Q: Describe the structure of the Lac operon. How is it turned on? How is it turned off?

A: The gene products of the lac operon are very important for lactose metabolism. This is crucial for…

Q: The lac genotypes are as shown below: P+OcZ-Y+A+// P¯O+Z+Y+A+ (i) The lac operon consists of three…

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

Q: Describe the binding of RNA polymerase, repressors, andactivators to the lac operon when both…

A: The lac operon is a group of genes which has a single promoter and the genes in this operon codes…

Q: c) Mention to two biochemical procedures that can provide information about CAP and LacR binding to…

A: The lac repressor LacR acts as a lactose sensor and blocks transcription when lactose levels are…

Q: P+OcZ-Y+A+// P¬O+Z+Y+A+ i) The lac operon consists of three structural genes, lacZ, lacY and lacA.…

A: The lactose operon (also known as the lac operon) is a set of genes that are specific for the uptake…

Q: 1 Given the following genotypes, explain how the mutation (identified by a () superscript will…

A: Operon is a unit  consisting of one or more systems that function coordinately under the control of…

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

A: ANSWER;-

Q: 4b. Briefly describe the changes in gene expression that happen in the lac operon when lactose is…

A: 4b- lac operon: - Inducible system. - Both positive and negative regulation. - Involved in lactose…

Q: 10. Modify the diagrams below to reflect the activation and repression of lac operon. Use arrows,…

A: Lac operon contains genes involved in metabolism. The genes are expressed only when lactose is…

Q: I. In the lac operon, repression occurs when there is no lactose present. II. In the absence of…

A: When lactose absent and glucose is present no transcription of lac operon happens. Becaise lac…

Q: 5a. The table below summarizes expression of B-galactosidase (lacZ) and permease (lacY) from the lac…

A: 5a) Lac operon is an inducible operon that is expressed in the presence of a substance termed…

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: 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: 5. Briefly describe the lac operon and how it controls the metabolism of lactose.

A: An operon is a group of genes that are expressed under the same regulatory sequences.

Q: Discuss the concept of an operon and the roles of the various components in the E. coli lac operon.

A: Escherichia coli is referred to as a gram-negative, rod-shaped, facultative anaerobic, and coliform…

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: By using separate labelled diagrams, describe as detail as possile the actions of the normal and…

A: Lac operon is an inducible type of operon that gets activated when there is no glucose available and…

Q: You are studying an operon containing three genesthat are cotranscribed in the order hupF, hupH,…

A: Operon is a set of genes which are responsible for conduction of related functions. it is a feature…

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: 6. Which of the following is true about E. coll's lac operon? If there is no lactose present, the…

A: Option 1. For the lactose transport and metabolism of in E. coli and other bacteria, the lac operon…

Q: Let’s suppose a DNA mutation changes the consensus sequence at the −35 site in a way that inhibits σ…

A: A sigma factor or specificity factor refers to the protein factor required for the transcription…

Q: ii. ) If the lac operon in 'a' carried a mutation in the CAP binding site that rendered it…

A: First it has to be understood that : 1) the CAP-cAMP complex acts as a glucose sensor and is only…

Q: When lactose is added to growing culture of E. coli, the cells begin to make enzymes necessary for…

A: A small number of cells are first inoculated into a volume of sterile medium to grow E. coli in…

Q: The table below shows partial diploid E. coli with lac operon mutations  For each mutant, indicate…

A: The lac operon is an operon or group of genes with a single promoter.

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…

Q: Recall that the trp operon has a special leader sequence (trpL) between the operator and the…

A: INTRODUCTION Bacteria like Escherichia coli (a friendly inhabitant of our gut) need amino acids to…

Q: 1c  In context with transcription of prokaryotic genes briefly describe the effect the lac…

A: Transcription within the prokaryotic cell is regulated by the complicated interactions of…

Q: Describe in details all the differences between The Trp Operon and the Lac Operon. Why one is always…

A: As operon is that the cluster of genes expressed along from single promoter and lac and trp area…

Q: Decide which operon each of the following characteristics applies to. Note: a description may apply…

A: Introduction "In E.coli And Other Bacteria, The Lac Operon Is An Operon Or A Set Of Genes With A…

Q: The activator (V protein) that is present in the bacterial cell is normally phosphorylated, but only…

A: Phosphorylation alters the structural conformation of a protein, causing it to become activated,…

Q: humber of mutations affect the expression of the lac operon in E. coli. The genotypes of several E.…

A: Lac operon is a genetic unit that produces the enzymes necessary for the digestion of lactose. It is…