Compare and contrast the roles of a corepressor and an inducer innegative regulation of an operon.

Q: Using the lac operon as a model, explain the role of inducers, repressors, and inducer exclusion.

A: Genomic DNA (deoxyribonucleic acid) consists of both structural and regulatory genes. The structural…

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: Describe the regulation of the lac operon when lactose is present and glucose is absent

A: In 1961, F. Jacob and J. Monod proposed the operon model to explain the genetic basis of enzyme…

Q: The TRP operon functions by attenuation. Briefly explain how attenuation works and why it is…

A: Trp operon or the tryptophan operon is a group of genes that are responsible for tryptophan enzymes.…

Q: The lac operon is an example of ________ control in which the presence of an ________ is required…

A: lac operon is present in E.coli and it produce the enzymes which are required for the lactose…

Q: Explain why catabolite repression is used in regulating the lac operon and describe how it…

A: An Operon is a unit of structure and function that consists of the clusters of regulatory genes…

Q: Describe the main features of repressible operons.

A: An operon is defined as a particular set of genes present on a DNA that operates under same…

Q: describe the actions of the normal and mutated lac operon in absence of lactose

A: The Lac operon is a group of genes with a  single promoter. It takes place in prokaryotes(bacteria).…

Q: Explain how the lac operon exerts positive regulation.

A: operons are gene regulatory elements found in prokaryotes . these are set of genes which are…

Q: Describe the structure of an operon and state the role ofeach component of the operon.

A: Operon acts as a single regulated unit having one or more structural genes, promoter genes, a…

Q: Use the lac operon to describe the process of controlling transcription through operons  (structural…

A: Operons are polycistronic gene clusters that can be regulated by a promoter. It consists of a…

Q: Compare and contrast the lac operon and repressible operon systems.

A: Expression of each and every gene is not always required in an organism. Gene expression must occur…

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: Predict the effect on the activity of the lac operon of a mutation that disrupts the function of: a)…

A: The Catabolic Activator Protein (CAP) is a protein which acts as a positive regulating factor for…

Q: Describe what happens to the trp operon as the cell uses up its store of tryptophan.

A: The cells have amino acids in various forms such as precursors or native form. Amino acids are an…

Q: How does the Trp operon work? A. Binding of Trp to a repressor protein allows the repressor to bind…

A: Trp operon is the cluster of genes that are responsible for synthesis pf operon

Q: Differentiate between positive and negative control, and show how both types of control operate in…

A: Controls are always part of the scientific experiments. They help researchers to conduct…

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: Explain how the Lac operon works to regulate the expression of genes in bacteria. Explain the operon…

A: Bacteria has chromosome and some extra chromosomal plasmids.

Q: Describe the binding of RNA polymerase, repressors, andactivators to the lac operon when both…

A: The lac operon is a group of genes which has a single promoter and the genes in this operon codes…

Q: Define operon and explain the functions of the operator and promoter regions.

A: To save resources as well as energy, an organism controls its gene expression process. An organism…

Q: Compare and contrast the functional mechanism of the Inducible - Lac operon  with the Repressible -…

A: Gene expression is a process in which the genetic instructions of genes are utilized to manage…

Q: Define operon.

A: Step 1 Gene regulation is the phenomenon of switching off as well as switching on of the genes…

Q: What is an operon? Explain an inducible operon.

A: In genetics, an operon is a functioning unit of DNA containing a cluster of genes under the control…

Q: operon

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

Q: Distinguish between a repressible operon and aninducible operon.

A: The Operon is the regulatory system present in DNA in cluster form, which contains structural genes…

Q: Sequence lac operon regulation

A: The basic concept of how the gene regulation carried out at transcriptional level in bacteria was…

Q: Explain the structure of Lac operon in bacteria.

A: Lactose is a beta-galactoside that E.coli use for energy and as a carbon source after it is broken…

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: The Lac Operon is induced by both the presence of and the absence of in the environment.

A:

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: Draw a schematic diagram showing the components involved in the regulation of the tryptophan operon.

A: The trp operon is regulated by the trp repressor. When bound to tryptophan, the trp repressor blocks…

Q: Illustrate the mechanism of the trp operon in E. coli.

A: The trp operon codes for the components required for tryptophan synthesis. An operon is a collection…

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: The lac operon has which of the following characteristics? O 1) usually requires an activator…

A: In Eukaryotes all genes are separate and produce individual mRNAs on transcription. However, in…

Q: Explain how the trp operon is regulated by trp repressor and by attenuation.

A: Gene is the hereditary unit occupying a specific position in the chromosome and carries information…

Q: Describe the role of the CRP–cAMP complex in positiveregulation of the lactose operon in E. coli.

A: The E. coli lac operon includes genes involved in lactose metabolism. It is only expressed when…

Q: Briefly describe the lac operon and how it controls the metabolism of lactose.

A: In prokaryotes gene expression the gene expression occurs in a polycistronic manner. Polycistronic…

Q: In how many different ways is the regulation of the Trp operon?

A: An Operon is a region in a DNA that is required for the regulation of gene expression in…

Q: Explain and give an example (lac operon) of how inducer operons function in prokaryotes.

A: Prokaryote are organisms that lacks a distinct nucleus and other organelles due to the absence of…

Q: Explain how activators and repressors regulate operons in prokaryotes.

A: In prokaryotic cells, there are three types of regulatory molecules that can affect the expression…

Q: Describe in details all the differences between The Trp Operon and the Lac Operon. Why one is always…

A: As operon is that the cluster of genes expressed along from single promoter and lac and trp area…

Q: Explain the process of attenuation in the trp operon under the following conditi (i) No tryptophan…

A: Answer

Q: In the lac operon, the product of structural gene lacz is capable of

A: Lac operon is a gene expression regulatory system that is responsible for the transport and…

Q: Explain what is Lactose operon and how does the system work .

A: The lactose operon also called as lac operon is a metabolism of lactose in E. coli in which operon…

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…

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.