Which of the following statements about trp operon regulation is TRUE? A. Low trp levels result in trp repressor binding. B. High trp levels result in transcriptional antitermination. O C. Low trp levels cause the ribosome to fall off at the trp codons in the upstream ORF. D. High trp levels cause the ribosome to fall off at the trp codons in the upstream ORF. O E. Low trp levels result in transcriptional antitermination. QUESTION 34 Consider the following partial diploid for the lac operon system. 1. lacl+ O+ lac Z+Y-A- 2. lacls O+ lac Z-Y+ A+ In this configuration, which of the following statements is TRUE? A. With no lac present, ZYA will all be expressed. B. with lac present none of the genes (ZYA) will be expressed. C. With no lac present, only YA will be expressed. D. None of these answers is correct. E. With no lac present, only Z will be expressed.

Q: Study the depiction of the lac operon in Figure 11.2. Normally, the genes are turned off when…

A: The lac operon contains three genes: lacZ, lacY, and lacA. These genes are transcribed as a single…

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: An operon is repressible—a small effector molecule turns off itstranscription. Which combination(s)…

A: Introduction:Two main stages are there at which gene is expressed: transcription and translation.…

Q: synaptic knobs of a nueron have what function? a. they release neurotransmitter into the synaptic…

A: The nervous system is the specialized system that controls the sensory and motor activity in the…

Q: he bands indicated by arrow "A" (to the left of the western blot) most likely represent:   A.…

A: The bands indicated by arrow "A" (to the left of the western blot) most likely represent:-

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

A: LAC operon of E. coli is an example of inducible gene expression system. Lactose acts as inducer…

Q: 2) Attenuation of the trp operon is controlled by the formation of stem-loop structures in the mRNA…

A: Tryptophan attenuation is a means of regulation of tryptophan biosynthesis. Normally when tryptophan…

Q: The trp operon in E. coli is a negative repressible operon. This implies that...   a. The trp…

A: The correct answer is:c. The trp operon makes use of a repressor and can be turned "on" (i.e., is…

Q: Which of the following elements of the lac operon and its associated regulatory factors function in…

A: One of many types of functional regulatory elements are cis-regulatory modules. Regulatory elements…

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: Six strains of E. coli (mutants 1-6) that had one of the following mutations affecting the lac…

A: The mutations that would prevent the E.coli strain from utilizing lactose include deletion of lacY,…

Q: . For each of the following growth conditions, whatproteins would be bound to lac operon DNA?…

A: An operon consists of many related genes that are regulated by a common operator. The multiple genes…

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: 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: The gad operon is controlled by a number of transcription factors that regulate a promoter of…

A: Bacteria re found in prokaryotes. They are more primitive as compared to eukaryotes.

Q: Select the correct statement about the trp operon: high levels of tryptophan promotes high…

A: Introduction :  Lac Operon is a collection of genes with a single promotor that encodes genes for…

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: For each of the following, match with the stage of gene expression being regulated.…

A: DNA and RNA are nucleic acids present in the organisms. DNA is the deoxy ribose nucleic acid whereas…

Q: Eukaryotic transcription has the following regulatory upstream element (region) in addition to…

A: In Eukaryotic transcription, the cells undergo several steps for copying genetic information present…

Q: The diagram below represents the tryptophan operon with the trp leader mRNA transcript enlarged to…

A: The trp operon is operated in most bacteria including E. coli which is a repressible operon. This…

Q: In the trp operon, tryptophan is best characterized as being a: A. repressor B. inducer C.…

A: Operon is clustered of Genes where a single mRNA consists of more than one functional gene.It is…

Q: Which of the following is not true regarding gene regulation that involves DNA bending? a. The…

A: Gene Regulations or regulation of gene expression includes a wide range of mechanisms that's turning…

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: For the trp operon, determine whether genes will be expressed (on) or silenced (off) given the…

A: Gene is a basic unit of hereditary information or data that fills a fixed position on a chromosome.…

Q: P*O*Z*Y# Example lac+ I*p*o+z*Y* FP*0*Z*Y* IP*o*z*Y* -P#O*Z¥Y* I*p*oCz*Y C I*p*o+z*Y

A: The lac operon is a catabolic operon and is expressed in the presence of the inducer lactose.

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: A mutation that inactivates the regulatory gene of a repressible operon in an E. coli cell would…

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

Q: DEFINE what is an Operon, and compare and contrast regulation of the LAC Operon and the TRP Operon.…

A: As per our honor code, we are allowed to answer one question at a moment. You have posted multiple…

Q: Which of the following statements is true regarding transcriptional attenuation of the trp operon?…

A: Operon is the cluster of genes which help in the regulation of the expression of genes.  The…

Q: Two different types of gene regulatory elements are DNA sequence and protein-based. Which of the…

A: Gene regulator  A gene that code for protein which involves in the regulation of a gene or group of…

Q: Which of the following statements about the lac operon is correct? 1. lacZ, lacY and lacA proteins…

A: Introduction :  Lac Operon -  Regulatory gene is Lac I . Structural genes are lacZ,  lacY and lacA.…

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.