The fox operon, which has sequences A, B, C, and D (which may represent either structural genes or regulatory sequences), encodes enzymes 1 and 2. Mutations in sequences A, B, C, and D have the following effects, where a plus sign (+) indicates that the enzyme is synthesized and a minus sign (-) indicates that the enzyme is not synthesized. Fox present Mutation in sequence Enzyme 1 Enzyme 2 Enzyme 1 Enzyme Fox absent No mutation A D + +| | +

Q: 1) The logic of the Lac operon was deciphered by using bacterial lac-operon mutants. Crucial to the…

A: Lac operon is a genetic unit in bacteria that helps in the metabolism of lactose in E.coli and lac…

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: Why is step 2 correct, is it because this is a repressible operon?

A: Operon is a cluster of genes which contains operator, promoter and structural genes. It is a kind of…

Q: Is proA in the lac operon? Only lacI, lacZ, lacY, are in the lac operon, right?

A: Answer : No,  proA is absent in lac operon.        Additional information : ProA is present in the…

Q: Under what conditions is lac repressor bound to the lac operon?

A: Lactose operon (Lac operon) was discovered in Escherichia coli. This is studied to understand the…

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: 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: What turns the operon on when lactose is present?

A: An operon is defined as a functioning unit of DNA that contains a cluster or group of genes under…

Q: Operon X produces three enzymes that convert Compound A to Compound B. The R gene makes the…

A: Gene expression is given on the basis of RNA. It is a process through which there is turning on of…

Q: Which of the following statements is not true of both the LacI and TrpR repressor proteins?a) an…

A: The objective of the question is to identify the statement that is not true for both LacI and TrpR…

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: According to the operon model, for the synthesis of an inducible enzyme to occur, the end-product…

A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…

Q: What does a suppressor mutation suppress? What is the differencebetween an intragenic and an…

A: Mutation, an alteration in the genetic material of a cell of a living organism or of a virus that is…

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: What are the advantages of using the T7 polymerase to control expression?

A: The T7 RNA polymerase system offers precise control over gene expression with high specificity,…

Q: How is glucose involved in positive control of the lac operon?

A: A set of genes present in E.coli. that regulates the uptake of lactose from the surrounding…

Q: What is the function of each of the parts of the lac operon (promoter, operator, CAP binding site,…

A: The lactose operon (also called the lac operon) is a group of genes present in E. coli and other…

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: 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: How do we know that the trp operon is a repressible controlsystem, in contrast to the lac operon,…

A: Introduction The process by which the information contained in a gene is used to drive the assembly…

Q: What led researchers to conclude that a repressor moleculeregulates the lac operon?

A: Lac operon is regulated by the lac repressor molecule.

Q: Identify the different functions of the genes coded in the lac operon region.

A: Operon is a set of linked genes that codes for proteins that are functionally related. lac operon is…

Q: What is a negative inducible operon?

A: Regulated genes can be switched on/off depending on cell's metabolic needs. Operon It is a group of…

Q: Is RNA silencing an environmentally-induced epigenetic change? Explain.

A: The regulation of gene expression via alterations to DNA, RNA, or histone proteins is known as…

Q: How does the level of tryptophan alter transcription of the trp operon?

A: An operon is defined as the set of structural genes that are under the regulation of a common…

Q: How does cAMP and allolactose work to influence the operon?

A: The two proteins involved regulation of lac operon are CRP (catabolite repressor protein) and lac…

Q: ac operon.  Drag the listed molecules to their corresponding bin. Reset Help   ONPG IPTG X-Gal…

A: ONPG - beta-galactosidase cleaves this molecule to form a visible yellow product. Explaination:  The…

Q: What conservation laws (P- or S- invariants) can be found in the lac operon regulatory Petri net?

A: The lactose operon or lac operon is an operon that is required for the transport and metabolism of…

Q: If p63 can bind to the same promoter elements as p53, why would it be considered an inhibitor of…

A: Promoters are DNA sequences that function as a kind of "On" switch to start the biological process…

Q: You identify a mutant that affects lac operon expression. You decide to investigate this mutant…

A: Wild-type lac Operon Regulation:The lac operon in E. coli is a cluster of genes involved in lactose…

Q: What are the major differences between an operon and a regulon?

A: DNA regulation is a process, in which genes are generally expressed and regulated with the help of a…

Q: What is the function of cAMP in regulation of the lac operon? Group of answer choices it activates a…

A: The lac operon seems to be an inducible operon that uses lactose as a source of energy and is active…

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.