Distinguish between a repressible operon and aninducible operon.

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: Explain how the lac operon is both positively and negativelycontrolled.

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

Q: components of an operon into the appropriate order

A: components of an operon into the appropriate order:…

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 and give an example (trp operon) of how repressor operons function in prokaryotes.

A: Repressor binding physically  blocks RNA polymerase from transcribing  structural genes.

Q: Define an operon.give an example,exaplain an inducible operon?

A: Gene regulation is the mechanism which acts to either induce or repress the gene expression. It…

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: Define operon and polycistronic mRNA.

A: The working segment of a DNA molecule that mainly codes for the protein is a gene. Gene itself…

Q: Explain, with diagrams, how transcriptionattenuation works in the trp operon.

A: Atteunation is a mechanism of control in some bacterial operons which results in premature…

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: Compare and contrast the lac operon and trp operon of E. coli.

A: E.coli is a type of bacteria that is mostly found in the human intestine and gut of some animals. It…

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: 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: 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: 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: 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: IS binding to the repressor, rendering it inactive and turning the operon on. Lactose is binding to…

A: The lac operon is an operon, or group of genes with a single promoter.The genes in the operon encode…

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: In the lac operon, how would gene expression be affected if each one of the following segments was…

A: The lac operon is basically a group of genes with a single promoter whose genes encode proteins that…

Q: Define the term operon and explain one advantage it provides to a bacterial cell

A: The cells are the primary unit of life. Based on the number of cells an organism may be prokaryotic…

Q: Define operon.

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

Q: Describe how the trp operon is under negative control

A: Introduction  Gene Regulation: Expression of gene is highly regulated in both prokaryotes as well as…

Q: operon

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

Q: Describe about operon.

A: The prokaryotes are the unicellular organism that does not contain true nucleus and membrane bound…

Q: Define regulation of gene expression with suitable model (lac operon) ?

A: Gene expression is the process by which the instructions in the DNA are converted into a functional…

Q: Differentiate inducsible and repressible operon

A: The promoter and operator control the group of genes which are called operons. Some operons are…

Q: Describe the organization of the lac operon.

A: Step 1 Inducible Operon System (Lactose Operon) is a regulated operon system in which the structural…

Q: Give the Genetic Proof of the Operon Model ?

A: An operon represents a genetic unit with one or more structural genes and an operator sequence and…

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: Define operon theory

A: Genes are the basic structural and functional unit of heredity. They carry coded genetic information…

Q: What is a bacterial operon and the two types of it?

A: The bacterial genome consists of thousands of different genes located on one chromosome and these…

Q: Distinguish between an operon and a regulon.

A: The process of activation and deactivation of the genes as per their requirement by the cells is…

Q: How is the operon positively and negatively regulated?

A: The activity of the promoter that controls the expression of the lac operon is regulated by two…

Q: Can you think for how long the lack operon would be expreesed in the presence of lactose?

A: Lac operon is an operon that regulates the breakdown of lactose present in the medium. It contains…

Q: Differentiate between inducible and repressible opero

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

Q: Describe the advantages and disadvantages for organisms that arrange genes in operons.

A: Operons are regions of DNA that contain clusters of related genes and are made up of promoter…

Q: explain how the Lac operon gets turned on and off .

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

Q: If a particular operon encodes enzymes for making an essential amino acid is regulated like the trp…

A: The operon has five structural genes that code for the three enzymes required to convert chorismic…

Q: analyze and diverge inducible and repressible operons.

A: 1. Some operons are usually "off," but can be turned "on" by a small molecule. The molecule is…

Q: A mutation at the operator site of a positive inducible operon that causes the sequence of the…

A: The majority of mutations in the operator, the repressor's binding site, result in lesser…

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…

Q: Explain how alternate sigma factors can be used to initiate transcription of distinct sets of…

A: Answer: Introduction: Sigma factors is a bacterial transcription factors which can attach core RNA…

Q: Highlight the main points of lac operon operation.

A: In prokaryotes, gene regulation is most prominent during the start of transcription. As a result,…

Q: Distinguish among inducible, repressible, and constitutive gene operons.

A: An operon is a cluster of functionally-related genes that are controlled by a shared operator, it is…

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.

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.