Which diagram shows a system in which the lac operon genes are NOT going to be transcribed by the E. Coli? O Diagram B because the repressor protein is attached allowing for the RNA Polymerase to being to transcribe the genes. Diagram A because the repressor protein is no longer attached to the DNA segment. Diagram A because the repressor protein is ready to transcribe the genes Diagram B because there is no lactose present.

Q: 10. a. Describe an operon? b. How lac operons controls gene expression in bacteria

A: (a) An operon is a functional unit of DNA containing a set of genes including structural gene, a…

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: Escherichia coli is grown in the presence of 20 mg of glucose and 20mg of lactose as carbon sources.…

A: Diauxic growth is the two phasic growth of bacteria as two different carbon source is present. As…

Q: Where does allolactose, the inducer of the lac operon, bind? a. to the operator O b. to the…

A: Lqc operon is the set of genes responsible for the metabolism of lactose in Ecoli . The lac operon…

Q: A mutation in the operator region of the trp operon can prevent the trp repressor from binding to…

A: Operons are the functional unit of transcription and regulation of genes in almost all bacteria and…

Q: The trp repressor binds to the operator region of DNA as a dimer (two repressor protein subunits…

A: The trp operon regulation is a repressible system. When the effector molecule binds to the…

Q: the trp operon is an example of… ? enzyme repression enzyme induction  catabolite repression

A: A primary difference between repressible and inducible systems is the result that occurs when the…

Q: The data below depicts the binding of the E coli RNA Polymerase to DNA containing a promoter…

A: RNA polymerase is specific enzyme that synthesized RNA from the strand of DNA. They helps to copying…

Q: A mutant E. coli strain has been discovered that has a non-functional lac operon. It's genotype is…

A: In order for the mutant E. coli strain to produce β-galactosidase, a mutation would be needed in the…

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: only in cell biology the Lac operon in bacteria encodes proteins required to import and digest the…

A: The lac operon, also known as the lactose operon, is found in E. coli and other intestinal bacteria.…

Q: The regulatory gene that codes for the tryptophan repressor is not tightly linked to the trp operon.…

A: Bacteria such as E.coli need amino acids to survive and such as amino acid Tryptophan. If tryptophan…

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: 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: What would be the effect on tryptophan production of mutations in region 1 of the leader of the trp…

A: Step 1 In operon like tryptophan operon transcription starts from transcription start site, but get…

Q: If the two trp codons in the leader sequence were mutated to stop codons, what effect would it have…

A: DNA is the preferred carrier of genetic information in most living organisms except for certain RA…

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: Considering the fec operon described above, under which conditions would the operon be off? Choose…

A: The protein synthesis process is started from the operon region that is actually worked as a switch.…

Q: (Theme 5) AraC is a transcriptional activator that binds to the AraC binding site and is encoded by…

A: The introduction of arabinose into the bacterial culture serves as a trigger for the activation of…

Q: Explain how the lac operon is regulated when both glucose and lactose is present. Make sure you…

A: An operon is a unit of gene expression that is present in bacteria and it helps to regulate gene…

Q: If the lac operon is "on" and transcribed, what is produced by RNA polymerase? O a. RNA polymerase…

A: The lac operon is a group of genes that work together to regulate the metabolism of lactose in…

Q: QUESTION 19 Which of the following reagents can induce the expression (or turn on) of…

A: The lac operon is a well known regulatory system in bacteria, notably in Escherichia coli (E. coli),…

Q: The polycistronic Histidine Operon in E. coli encodes all of the proteins necessary for the…

A: An operon is a gene unit of bacterial system whose transcription is positively and negatively…

Q: you have a cell that carries mutations in the lac operon repressor gene that render it unable to…

A: The simple concept behind the action of the lac repressor gene is to bind to the lac operon operator…

Q: 5) The bacterial Lac operon is an example of transcriptional regulation. What are the major…

A: Using an example of Escherichia coli for the bacterial lac operon. Escherichia coli is a…

Q: ptoph had a mutation on the repressor, not allowing it to bind with tryptophan. The repressor is…

A: Operons are proteins encoded together as a block that performs specific functions and are involved…

Q: What is the regulatory region of the Trp operon that is involved in alternative transcription…

A: A set of genes known as the trp operon is discovered in the bacteria E. coli and codes for the…

Q: Orca is a new type of E. Coli bacterium. Suppa is a nutrient that Orca needs to survive. Suppa can…

A: The lactose operon, also known as the lac operon, is a gene that is actually needed for the…

Q: Which statement about the transcription attenuation mechanism is TRUE? 1.In some operons (e.g., the…

A: Transcriptional attenuation is a regulatory mechanism that causes premature termination of…

Q: explain this image for the ecoli bacteria mutation trpE

A: Introduction The trp operon is a type of operon system found in E. coli bacteria. The trp operon…

Q: Part A If E. coli bacteria are placed in an environment that contains both glucose and lactose, the…

A: When glucose concentrations are low, E. coli can use other sugars as fuel. The c AMP-CAP protein…

Q: You mutated the gene encoding the cyclic AMP receptor protein (CRP). In this mutant, the CRP is…

A: Operon is a gene regulatory structure that contains clusters of genes and these clusters of genes…

Q: ORIGIN 1 aagcttctcc accagcgctt tcagctgcgc cagggtctgc tgccggtcct ccgcggcggc 61 gacaggccag gccgactggc…

A: Introduction: Lac operon is a polycistronic structural gene that is regulated by a promoter and…

Q: when tryptophan is present, what would happen to trp operon regulation

A: Introduction:- The trp operon is a collection of genes identified in E. coli bacteria that code for…

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: High levels of glucose in the environment result in low levels of transcription of the lac operon.…

A: Answer- glucose lowers the levels of cAMP, which is necessary to activate the CAP protein

Q: Suppose that E. coli sustains a mutation in its gene for the lac operon repressor making the…

A: When lactose is not present in the medium operon does not transcribe because of the presence of lac…

Q: Figure 5 shows the lac operon structure in Escherichia Coli What will happen if substance S is…

A: Lac operon contains genes coding for proteins in charge of transporting lactose into the cytosol and…

Q: Suppose that E. coli sustains a mutation in its gene for the lac operon depressor making the…

A: A lac operon is a group of genes with a single promoter ( it is transcribed as a single mRNA). The…

Q: A hypothetical operon, the O3M operon, controls the breakdown of omega-3 fatty acids. When omega-3…

A: Introduction:- An Operon is defined as the unit of gene expression and regulation. A single operon…

Q: Which of the following could be used to turn on a regulon (composed of multiple genes and operons)…

A: Regulon is a functional genetic unit composed of a noncontiguous group of genes that are regulated…

Gene Interactions

When the expression of a single trait is influenced by two or more different non-allelic genes, it is termed as genetic interaction. According to Mendel's law of inheritance, each gene functions in its own way and does not depend on the function of another gene, i.e., a single gene controls each of seven characteristics considered, but the complex contribution of many different genes determine many traits of an organism.

Gene Expression

Gene expression is a process by which the instructions present in deoxyribonucleic acid (DNA) are converted into useful molecules such as proteins, and functional messenger ribonucleic (mRNA) molecules in the case of non-protein-coding genes.