What does the lac operon consist of? How is the operator switch turned on and off in the expression of genes in this operon? Explain.

Q: What role does the I gene product play in regulation of the Lac operon

A: The operon plays an important role in bacteria. The lac operon is an essential operon useful for…

Q: What would happen if the operator sequence of the lac operon contained a mutation that prevented the…

A: The Structure Of lac operon --Genes present in the lac operon specify proteins which help in the…

Q: How does catabolite repression  work on  gal operon?How could you decide if one particular operon is…

A: catabolite repression : Catabolite repression is a regulatory system by which any microorganism…

Q: Attardi et al. (1963) found that lactose operon mRNA synthesis in coli increased with the addition…

A: Both structural and regulatory genes are found in genomic DNA, and both encode products that act as…

Q: How does repression work in the lac operon?

A: Lac operon consists of a promoter, operator group of structural genes such as lac A, lac Z, and lac…

Q: Please help me iwht this question explain how the regulation of the Lac Operon incorporate both…

A: An operon includes a group of genes that are expressed under the same promoter.

Q: What is the difference between negative and positive regulation in operon? Explain it with the help…

A: BASIC INFORMATION  OPERON MODEL  This model of gene regulation was put forward by Francis Jacob and…

Q: The trp operon, found in E. coli, is a group of genes that encode biosynthetic enzymes for the amino…

A: When tryptophan levels are low tryptophan operon  is induced to transcribe structural genes so that…

Q: Which of the following statements about the trp operon is false?

A: From above question the statement  If a mutation in region 2 prevents the formation of the 2 + 3…

Q: a mutation that leads to a nonfunctional adenylate cyclase enzyme would lead to what expression…

A: A mutation is a change in the genetic material (the genome) of a cell of a live creature or a virus…

Q: . Listed in parts a through g are some mutations that were found in the 5′ UTR of the trp operon of…

A: trp operon: it's found in E coli and it encodes for essential amino acid tryptophan. The trp DNA is…

Q: . Listed in parts a through g are some mutations that were found in the 5′ UTR of the trp operon of…

A: The bacterial transcription unit containing more than one gene is known as an operon. An operon has…

Q: The arabinose operon How does the araC protein regulate of the arabinose operon. How does its…

A: How arac protein regulate arabinose operon and how binding differ  If arabinose is absent, the dimer…

Q: The attenuation mechanism that helps block expression of the tryptophan operon requires all of the…

A: In transcriptional attenuation, the expression of genes are negatively regulated by controlling the…

Q: Attardi et al (1963) found out that lactose operon mRNA synthesis in E. coli increased with the…

A: Introduction Operon is a genetic regulatory system found in bacteria and their viruses that clusters…

Q: Why trp operon has a higher level of expression than live operon in bacteria grown on nutrient-poor…

A: Operon is a genetic regulatory system that is found in bacteria and viruses. This system controls…

Q: . Listed in parts a through g are some mutations that were found in the 5′ UTR of the trp operon of…

A: INTRODUCTION: Tryptophan (trp) operon for the synthesis of the amino acid tryptophan, is an example…

Q: A bacterial cell is mutated and cannot create the repressor protein associated with the Lac operon.…

A: Lac operon is associated with uptake and metabolism of lactose. It has several components such as a…

Q: Which of the following arabinose operon regulatory sites is exclusively involved in the repression…

A: Hi, Thanks For Your Question.  Answer : Correct Option Is Ara O2.

Q: operon

A: Answer: Operon: In genetics, an operon is a functioning unit of DNA containing a cluster of genes…

Q: Let’s suppose you have isolated a mutant strain of E. coli in which the lac operon is constitutively…

A: E.coli is a gram negative bacterium which thrives in the intestine of mammals. E.coli is beneficial…

Q: Why is the TRP operon considered a repressible operon, while the LAC operon is considered an…

A: Operons are areas of DNA which are composed of cluster of related genes which are controlled by…

Q: If an abnormal repressor protein could still bind allolactose, but thebinding of allolactose did not…

A: Deoxyribonucleic acid is a particle made out of two polynucleotide chains that loop around one…

Q: Explain how the following conditions will affect the regulation of the operon. Low cAMP levels; E.…

A: Operon is a sequence of DNA that consists of a set of genes which are involved in a particular…

Q: What is the function of cAMP in the regulation of the lac operon and how is the production of cAMP…

A: The Lac operon is a set of genes in prokaryotic cells that regulate lactose metabolism. An operator…

Q: A mutation prevents the catabolite activator protein (CAP) from binding to the promoter in the lac…

A: Mutation means sudden changes occur in DNA sequences. The mutation occurs randomly. It also occurs…

Q: Why it is essential to the positive stimulation of transcription of the lac operon ?

A: Lac operon includes the genes that code for the enzymes involved in lactose catabolism.

Q: What is the order of ZYA on the lac operon?

A: Lac operon includes a set of genes having a single promoter, which enables the bacterium to secrete…

Q: What is the difference between positive regulation of the lac operon and negative regulation of the…

A: The lac operon is a set of three bacterial genes under the control of a single promoter which is…

Q: What is the phenotype of an E. coli strain with a mutation in the lac operator that allows the lac…

A: Operon is defined as a region of DNA where it is made up of clusters of related genes arranged under…

Q: . Mutants were isolated in which the constitutive phenotype of a missense lacI mutation was…

A: In an experiment, the mutants were isolated in which the constitutive phenotype of a missense lacI…

Q: Bacterial DNA containing an operon encoding three enzymes is introduced into chromosomal DNA in…

A: Prokaryotes are the organisms that lack the cell nucleus and membrane-bound organelles. They have…

Q: Let’s suppose you have isolated a mutant strain of E. coli in which the lac operon is constitutively…

A: Escherichia coli contains genes present in the lac operon that are activated in the absence of…

Q: Under what conditions would you expect to see high levels of expression of the structural genes in…

A: Please find your answer in step2:

Q: Explain how elements of the lac operon are exploited to regulate recombinant protein production in…

A: Introduction Three structural genes, as well as a promoter, a terminator, a regulator, and an…

Q: What structural features does the trp operon share with the lac operon?

A: Genes are collections of nucleotides that code for a specific protein. For protein synthesis to…

Q: Explain how the following conditions will affect the regulation of the operon. (3 pts) Low cAMP…

A: Lac operon is a mechanism seen in the E coli that enables the proper metabolism in its body. The…

Q: Would you expect to see attenuation in the lac operon and other operons that control the metabolism…

A: Lac operon contains genes that are involved in the lactose metabolism. It is expressed when lactose…

Q: The lac operon is an inducible operon. What does this mean?

A: Operons are the groups of genes related to a single pathway and controlled by a single promoter.…

Q: Which of the following arabinose operon regulatory sites is exclusively involved in the repression…

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

Q: Why is it beneficial for the bacterium to regulate the lac operon with both a repressor protein and…

A: Lac operon permits the metabolism of lactose sugar in bacterial cells. It contains three genes that…

Q: Attardi et. al (1963) found that lactose operon synthesis in E.coli increased with the addition of…

A: operon, a genetic regulatory system found in bacteria and their viruses that clusters genes coding…

Q: With respect to the lac operon, what is allolactose?

A: It is an operon required for the transport and metabolism of lactose in E.coli and many enteric…

Q: Why do scientists define the trp operon as repressible and the lac operon as inducible?

A: Operon is a combination of genes that are transcribed by the same promoter.

Q: . Listed in parts a through g are some mutations that were found in the 5′ UTR of the trp operon of…

A: The bacterial transcription unit containing more than one gene is known as an operon. An operon has…

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.