For each of the following, match with the stage of gene expression being regulated.                                                             DNA methylation                                                             Feedback inhibition                                                             Operons                                                             Poly-A tail length A. Post-translational regulation B. Transcriptional regulation C. DNA packaging D. Translational regulation

Q: If the above gene is one of the three structural genes of the lac operon that codes for the protein/…

A: The bacterium Ecoli possess a highly effective lactose Metabolism process . The lac operon is a…

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: Explain and give examples of Inducible & Repressible Operons. Describe what types of protein…

A: Inducer: Inducer is the substance that causes the gene for protein synthesis to be activated.…

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: 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: 4a. The diagram below represents (a) the lac operon in the OFF state and (b) lac operon in the ON…

A: Note -  Since you have asked multiple questions, we will solve the first question for you. If you…

Q: Geneticists isolated six trains of E. coli (strains 1-6) whose lac operons had one of the following…

A: Lac operon It is an operon that is needed for the movement and metabolism of lactose in E. coli.

Q: 1.  Gene expression may be regulated after translation using the following mechanisms EXCEPT a. by…

A: Gene expression --Introduction -- Different cell types express different sets of genes . Two…

Q: What would likely result from a mutation in the lac operon promoter that increases the number of RNA…

A: RNA polymerase is the enzyme that polymerises messenger RNA (mRNA) over the DNA molecule. This…

Q: . Define operon and describe how operons affect how bacteria can regulate their gene expression.

A: In prokaryotes, one promoter is able to regulate multiple genes.

Q: On its chromosome, an E. coli cell has a genotype of lacI− lacZ+ lacY+ lacA+. It has an F′ factor…

A: Lac operon is studied extensively by using mutant strains of E.coli. It is studied under the domain…

Q: The T7 RNA polymerase has been used for production of recombinant proteins in E. coli cells. This is…

A: Question - The T7 RNA polymerase has been used for production of recombinant proteins in E. coli…

Q: A mutation that inactivates transcription and translation from the regulatory gene of an inducible…

A: An operon is a functional unit of genomic DNA that comprises a collection of genes that are all…

Q: cAMP binds to cAMP Receptor Protein (CRP), allowing CRP to bind to the promoter of the lac operon

A: Almost all bacteria such as E. coli contains lac operon which operates in utilization of lactose as…

Q: What would occur if the repressor of an inducible operon weremutated so it could not bind the…

A: An operon is a functional unit of genomic DNA made up of group of genes that is controlled by a…

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: If glucose is not available and lactose is absent from the environment, what is the status of…

A: Hi! Thank you for the questions. As you have posted multiple questions, I will be answering the…

Q: What is the role of a substrate that controls a repressible operon?   a. increase the production…

A: Operon is the segment of DNA. It consists of structural genes, regulatory, promoter and operator…

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: List and describe all the major players involved in transcription of the lac operon in bacteria…

A: Lactose operon is an example of inducible operon and it is the gene expression regulatory mechanism…

Q: The lactose operon in E. coli comprises two structural genes and three regulatory components.…

A: β-galactosidase activity Permease activity Genotypes Glycerol Lactose Glycerol Lactose A - + -…

Q: A)Explain the mechanism by which the lac operon is sensitive to glucose levels (presence and absence…

A: “Since you have asked multiple question, we will solve the first question for you. If you want any…

Q: As diagrammed below, some amino acid biosynthetic operons have stem loop structures in the mRNA.…

A: Option A is incorrect as without the formation of heparin the process of translation can not be…

Q: The transcription of many bacterial genes relies on functional groups called operons, such as the…

A: Turning/switching genes on and off is referred to as gene regulation. Cells start to take on…

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: the presence of tryptophan, and a mutation in the allosteric domain that abolishes tryptophan…

A: The trp operon is an operon that is a group of genes that is used for transcription  of messenger…

Q: Operons involved with the biosynthesis of molecules such as amino acids are most likely to be…

A: A repressible operon encodes for anabolic enzymes. The genes that encode these anabolic enzymes tend…

Q: What is the difference between the core promoter and the regulatory promoter? a. Only the core…

A: Answer: Introduction: a promoter is a sequence of DNA to which proteins bind to start transcription…

Q: Gene-specific transcription factors interact with DNA to control gene expression. At which surface…

A: Transcription is the process of copying genetic information from one strand of DNA into RNA. The…

Q: Consider the trp operon found in E. coli. You have discovered a mutant strain of E.coli that…

A: The genome of the prokaryotic organisms is polycistronic i.e. the genes are controlled by one…

Q: If the above gene is one of the three structural genes of the lac operon that codes for the protein/…

A: Introduction Lactose operon(lac operon) is a system which includes genes that are essential for…

Q: Answer these questions concerning promoters. a) What role do promoters play in transcription? b)…

A: A region in DNA molecule that initiates transcription of a particular gene is referred to as a…

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: Provide the SIGNIFICANT differences between the following: 1. Operon Systems Inducer/Lac…

A: An operon is a cluster of functional genes which are regulated by the common operator. Operons…

Q: B. A researcher was trying to determine whether two molecules (A and B) were corepressors or…

A: A- Molecule A is corepressors       Molecule B is inducer In molecule A ,It resemble corepressor…

Q: Which diagram shows a system in which the lac operon genes are NOT going to be transcribed by the E.…

A: The prokaryotic gene expression is regulated by operon system that involves expression of polycystic…

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: Many bacterial genes with related functions are arranged in operons, sets of contiguous genes that…

A: Transcription is the first od several steps of DNA based gene expression in which a particular…

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: Which of the following parts of the eukaryotic promoter are bound by general transcription factors?…

A: As visible In image GTF general transcription factor bind to core protein , proximal elements

Q: Which will be bound to the Lac Operon in an environment with lactose and glucose? A) both repressor…

A: The bacteria comprise many operons and one of the important operons is lac operon. Lac operon is…

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: In regulations demonstrated by initiation of transcription, if lactose is abundant, lactose in this…

A: The promoter is a region on the lac operon which is bounded by RNA polymerase to initiates the…

Q: A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous…

A: In bacteria and their viruses, an operon is a genetic regulatory structure in which genes coding for…

Q: There is a mutation in sequence of the lac operator that prevents the lac repressor from being able…

A: Gene expression is regulated at the level of transcription by operon systems. In prokaryotes,…

Q: however, a transversion occurred which changed the G nucleotide to T, what outcome(s) are likely?…

A: Promoter  Is it a sequence of DNA in up stream or near the beginning of the gene. It regulates the…

Q: DNA methylation is a potential example of A. post-translational control B. translational control C.…

A: DNA methylation is a biological process by which methyl groups are added to the DNA molecule. In…

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.