The gad operon is controlled by a number of transcription factors that regulate a promoter of approximately 450bp. Which would NOT explain why bacterial promoters are shorter than the typical eukaryotic promoter? a. Bacteria do not have nucleosomes b. Bacteria do not have mediator complex c. Each operon is regulated by only one signal d. All of the above are true

Q: All of the following statements about the repressor of the lac operon of E. coli are true EXCEPT…

A: The lac operon is a clustered group of related genes that are transcribed as a single unit. These…

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: How does tryptophan regulates its own production? a. When tryptophan levels are high, it binds to…

A: Tryptophan: In order to build proteins, bacteria such as Escherichia coli E.coli need amino acids.…

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 E. coli, induction in the lac operon and repression in the trp operon are both examples of a.…

A: Transcription, translation, post-transcription and post-translation. The process in which the gene…

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: Explain why large amounts of transcript result when a bacterium with a lac Operon is in a medium…

A: Transcription is the process by which RNA is synthesized from DNA. The messenger RNA or mRNA…

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: 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: What do you mean by coordinate expression of genes in operon?

A: Answer- In prokaryotes genes are controlled by one promoter region that is called polycistronic…

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: 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: 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: Wild-type E. coli grow best at 37oC, but can grow efficiently at temperatures up to 42oC. An E. coli…

A: Mutations is the phenomenon in which small changes in the nucleotide sequences takes place which…

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: 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: 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: A scientist compares the promoter regions of two genes. Gene A’s core promoter plus proximal…

A: Promoters are nucleotide sequences location upstream of a gene. They serve as sites where proteins…

Q: If CAP is bound to the Promoter of the Lac Operon and the repressor protein is not bound to the…

A: Operon is the prokaryotic gene regulatory system that controls the expression of polycistronic mRNA.…

Q: .  What is the function of operons in bacterial gene regulation? b.  Describe how a bacterial…

A: a. What is the function of operons in bacterial gene regulation?   b. Describe how a bacterial…

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: What will most likely happen when the -35 element and pribnow box are mutated? a. The sigma factor…

A: -35 element and pribnow box both act as the essential part of the promoter sequence for DNA…

Q: Mutations may have an effect on the expression of the lac operon and the trp operon. Would the…

A: Mutations are defined as the change in the sequence of DNA of an organism due to any environmental…

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: 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: a) In an experiment, you have changed a DNA sequence directly upstream from a start codon of an…

A: Introduction :- Operon model was proposed by Jacob and Monod in 1961. In this model , they explained…

Q: A bacterial cell undergoes a change and the two Trp codons of the tryptophan leader sequence are…

A: Tryptophan operon is an example of repressible operon which remain transcriptionally active and…

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: Which of the following is true about operons?   A. Contains a cluster of genes transcribed as…

A: An operon is a functional unit of transcription and genetic regulation, which occur primarily in…

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: 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: 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 statements about the attenuator region of the trp operon is TRUE? Choose an answer…

A: It is located upstream of the operator.

Q: Define the following in the context of operons: a. positive control   b. give an example of an…

A: Since you have posted a question with multiple sub-parts, we will solve first three sub-parts for…

Q: Explain how the lac operon is regulated under the following conditions. Include the following terms…

A: Lactose can be broken down by E. coli bacteria, however, it is not their preferred fuel. They would…

Q: Consider a hypothetical operon for alanine degradation. Alanine would most likely influence the…

A: Alanine is an amino acid that is catabolized in the enzymatic processes.

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: 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: 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: Which of the following statements is false?a) A derivative of lactose serves as an inducer of the…

A: Introduction: In bacteria, an operon is a coordinated component of genetic expression. In 1961,…

Q: In the: Mutation of the regulatory region for a repressor protein in the lac operon. Explain: (a)…

A: Operon  It is a set of multiple gene that is controlled by single operator.

Q: There is Hyaluronic acid synthesis occuring in Group X Strep and it is controlled by an operon with…

A: has operon  Hyaluronic acid synthesis operon is an operon system that is required for synthesizing…

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.