Describe which enzymes are required for lactose and tryptophan metabolism in bacteria when lactose and tryptophan, respectively, are (a) present and (b) absent. Contrast positive versus negative regulation of gene expression. Describe the role of the repressor in an inducible system and in a repressible system.

Q: Genes in both prokaryotes and eukaryotes are regulated by activators and repressors.a. Compare and…

A: Gene regulation refers to the mechanisms that are responsible for the repression or induction of…

Q: The lac repressor and the pur repressor are homologous proteins with very similar three-dimensional…

A: The lac represser supermolecule, LacI, prevents the transcription of genes concerned in lactose…

Q: Diagram the lactose operon in E. coli with the properorder of the elements lacI, lacO, lacY, and…

A: An operon is a group of genes that are expressed together under a common promoter and terminator.…

Q: In the lac operon (above), what happens when glucose levels are low, but lactose levels increase?…

A: Operon is the gene regulatory mechanism present in prokaryotic organisms. It regulates the…

Q: In the lac operon (below), how will expression of the genes lacZ and lacy be effect by a mutation in…

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

Q: Chromatin Immunoprecipitation (ChIP) experiments enable researchers to measure the levels of…

A: LPS (lipopolysaccharide) treatment results in the recruitment of the transcription factor NfkB and…

Q: List and briefly describe five types of molecular mechanisms thatmay underlie epigenetic gene…

A: A gene is a stretch of nucleotides present in the DNA. DNA or deoxyribonucleic acid is a polymer of…

Q: Now read this abstract from a 2013 journal article What is the authors' explanation of how Gal80p…

A: In the present system, GAL genes in Saccharomyces cerevisiae are regulated by the combined action of…

Q: Suppose you had a bacteriophage λ in which the gene encoding the cro protein had been mutated, so…

A: The mutation alters allele frequencies by constantly introducing new alleles, which can be…

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: describe the 4 types of suppressors inducer, repressor, promoter, and operator.

A: In genetics, a silencer is a DNA sequence capable of binding transcription regulation factors,…

Q: Yeast cells are grown with galactose as the sole carbon source and ATP levels are abundant. Describe…

A: GAL genes: The GAL genes, which include structural (GAL1, GAL10, GAL2, and GAL7) and regulatory…

Q: 3′-->5′ Exonuclease activity allows DNA polymerase III (Pol III) to back-up and fix a mismatched…

A: Since there are multiple questions in this particular question, I'll answer the first one for you.…

Q: What is the purpose of CAP and CAMP in gene regulation?

A: A wide range of mechanism carried out by the cells that act to induce or repress the synthesis of…

Q: name TWO mechanisms of control of gene expression that are only used by eukaryotes and discuss why…

A: The majority of gene expression is regulated at the transcriptional level, owing to protein binding…

Q: If a gene is repressible and under positive control, what kind of effector molecule and regulatory…

A: Gene regulation vary in prokaryotes and eukaryotes. Prokaryotic genes regulation may administrated…

Q: During certain stages of cell growth, the requirement for certain gene products may require gene…

A: Gene amplification is the rise in amount of a specific portion of the genome differentially, in…

Q: (a) Did deletion of any of the possible control elements cause anincrease in reporter gene…

A: Insertion and deletion are naturally processes occurring within the DNA or mRNA sequence for…

Q: A mutation in the repressor LacI causes it to lose the ability to bind its effector, allolactose.…

A: The question is asking about the effect of a mutation in the LacI repressor that causes it to lose…

Q: In the bacterium,Martian coli, it was discovered that the lac operon is positively regulated.…

A: Operon is a functional unit of DNA that consists of cluster of genes under control of promoter.…

Q: A which is involved in the silencing of the y-globin gene, is rendered inactive. CL11A is a Land a…

A: Gene silencing is a negative feedback process that controls gene expression and metabolism…

Q: A. A mutation is recovered in the gene that encodes the lactose operon repressor protein (LacI).…

A: Lac operon is a simple prokaryotic group of genes for the metabolism of lactose. It consists of…

Q: The Lac operon is a common example of prokaryotic control of gene expression. In what condition is…

A: Lac operon consists of structural genes such as lacZ, lacY, and lacA which are responsible for the…

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: Eukaryotes have a multitude of ways of regulating gene expression. Why are all these regulatory…

A: gene regulation is the process used to control the timing, location and amount in which genes are…

Q: Based on the given scenario, tell whether structural genes are expressed (YES) or not expressed (NO)…

A: Since you have posted a question with multiple sub-parts, we will solve the first three subparts for…

Q: .  What is the function of operons in bacterial gene regulation? b.  Describe how a bacterial…

A: a. What is the function of operons in bacterial gene regulation?   b. Describe how a bacterial…

Q: Mutation in the regulatory gene in the lac operon results in the formation of an inactive repressor.…

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

Q: Based on the labels you should be able to recognize the characteristic structure depicted below and…

A: Introduction The Process Of Turning Nucleic Acid Information Into Amino Acids Is Known As…

Q: Termicin is a small antifungal protein in termites that is produced by cells and secreted into…

A: The DNA sequence containing the termicin-encoding gene is transcribed into mRNA in the nucleus of…

Q: Design a transcriptional circuit that regulates the expression of β-galactosidase in a eukaryotic…

A: The central dogma theory is an important concept in molecular biology that explains the flow of…

Q: Explore the differences between positive inducible, positive repressible, negative inducible, and…

A: Positive Inducible Regulation:- In positive inducible regulation, the binding of the regulatory…

Q: The choice between lysogeny and lysis is influenced by many factors. How would external conditions…

A: The viral reproduction process refers to the formation of viruses while infecting the target host…

Q: For the trp operon, determine whether genes will be expressed (on) or silenced (off) given the…

A: Gene is a basic unit of hereditary information or data that fills a fixed position on a chromosome.…

Q: Describe the regulation of expression of the lac Z, Y and A genes in E.coli when there is LOW…

A:

Q: In addition to the effect on ribonucleotide reductase, hydroxyurea causes changes at the gene…

A: In each living cell, ribonucleotide enzyme (RNR) may be a crucial catalyst that facilitates the…

Q: al4 is a transcription factor that activates transcription of galactose metabolism genes in yeast.…

A: Glycolysis is a primary source of energy in yeast, and glucose is by far the most favored carbon…

Q: An abundance of misfolded proteins in the ER can result in the activation of the unfolded-protein…

A: Endoplasmic Reticulum can be referred to as one of the organelles of cell that can be observed in…

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.