Assuming that the level of glucose is low, a mutation in the repressor associated with the lac operon of E. coli which prevents binding of the repressor to lactose should result in: a. constitutive expression of the lac operon genes b. lack of expression or refuced expression of the lac operon genes under all circumstances c. expression of the genes only when lactose is present d. expression of the genes only when lactose is absent e. lack of expression of the lac operon genes, resulting in an increase in lactose production

Q: IPTG (isopropylthiogalactoside) is commonly used to induce protein expression in Lac…

A: IPTG, also known as isopropyl d-1-thiogalactopyranoside, is a molecular biology tool. This substance…

Q: Explain why the colloid osmotic pressure of the plasma is much higher than the colloid osmotic…

A: The osmotic pressure or the oncotic pressure is the pressure that drives the fluid movement from the…

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: Name and describe two types of constitutive mutants of the lactose operon.

A: Operon can be defined as an operating unit, which is nothing but gene clusters that are located…

Q: Which of the following molecules is an inducer of the lac operon:a. Galactose d. Isothiocyanateb.…

A: The structural genes lac z, lac y, and lac in the lac operon code for beta-galactosidase (converts…

Q: ACTIVITY 6: Based on all that you have learned, complete the table below. Blood Vessel Deoxygenated…

A: Blood vessels are channels through which blood is distributed to entire body .Blood vessels are…

Q: The only way that information is extracted out of DNA is through the transcription of MRNAS that…

A: According to our guideline we can answer only the first question. So upload the second question…

Q: Operons can not be:   a. Negatively regulated b. Positively regulated c. Constitutive d. Inducible…

A: The workhorses of a body are proteins. All or every function of the body are carried out by the…

Q: 1. In E.coli transcription of the Lac Operon is known to be under Global control. For this operon…

A: The lac operon, found in E. coli, comprises genes responsible for lactose transport and metabolism1.…

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: Explain the positive control of the lac operon A toxin was found to inhibit the production of CAMP…

A: Lac operon is the segment of DNA which includes cluster of genes for breaking down of lactose. The…

Q: Which of the following is false when the genes of the Lac operon are being tran- scribed in high…

A: Lac operon is a set of genes used by E.coli to metabolize lactose when glucose is not available for…

Q: . Define operon and describe how operons affect how bacteria can regulate their gene expression.

A: In prokaryotes, one promoter is able to regulate multiple genes.

Q: Regulation of the E. coli trp operon by attenuation requires the trp repressor protein. prevents…

A: An operon is a function unit of DNA containing a set of genes including structural gene, a…

Q: compare and contrast the regulation of the lac operon and the trp operon.

A: Prokaryotic organisms consists of two different types of operons that are important in the…

Q: 5. There are four genes in the FAK operon. a. How many mRNAs are encoded by this operon? b. The FAK…

A: Question 5 Answer a) There is only one mRNA that codes for four genes in the FAK operon.…

Q: 1. The B-galactosidase gene of the lac operon is expressed at high level when which combination of…

A: High lactose concentration induces the production of the B-galactosidase enzyme. Lactose acts as an…

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: 5f. Complete the diagrams below to reflect the proteins and any relevant cofactors (e.g. -…

A: The lac operon is an operon, or cluster of genes with one promoter (transcribed as one mRNA). The…

Q: 5. Use the table below to describe under what conditions the lac operator is turned on and off. Is…

A: The lac operon is a single-promoter operon that is necessary for the transport and metabolism of…

Q: A mutation that inactivates transcription and translation from the regulatory gene of an inducible…

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

Q: If there was a mutation such that the lac I protein could no longer bind lactose, but could still…

A: Lac operon is responsible for the metabolism of lactose in bacteria.

Q: Which of the below conditions would result in the lowest level of expression from the lac operon…

A: Option C is correct :

Q: An E. coli cell acquires a mutation in the gene that encodes CAP. The mutation affects the…

A: The transcription is a process through which information in the DNA molecule is transcribed into…

Q: If CAP is bound to the Promoter of the Lac Operon and the repressor protein is not bound to the…

A: Operon is the prokaryotic gene regulatory system that controls the expression of polycistronic mRNA.…

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: What statement is NOT true regarding transcription attenuation of amino acid biosynthetic operons?…

A: Amino acid biosynthesis is an anabolic process in which a molecule is synthesized as an end product.…

Q: The role of allolactose in the lac operon

A: Lac Operon:This is a classic example of a gene regulation system found in E. coli.The key…

Q: F’ lac I- O+ Z+/ lac I+ Oc Z- the genotype indicated would lead to what type of expression of…

A: Bacteria contain multicistronic arrangements for the expression of genes that are involved in a…

Q: 5f. Complete the diagrams below to reflect the proteins and any relevant cofactors (e.g. -…

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: Operons involved with the biosynthesis of molecules such as amino acids are most likely to be…

A: A repressible operon encodes for anabolic enzymes. The genes that encode these anabolic enzymes tend…

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.