A researcher was trying to determine whether two molecules (A and B) were corepressors or inducers in their respective operon systems. Data was collected regarding the levels of protein and the amount of gene transcription for the genes in their respectiver operons. The data is shown below. Level of protein Transcription of gene 1 Transcription of gene 2 low Molecule A High low Low high high Molecule B High high high Low low low a) Determine whether molecule A and Molecule B are inducers or corepressors. Justify your answer. b) Identify which system resembles the lac operon system and which resembles the trp operon system.

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: 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: 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: For the following questions, describe the expression levels of the structural genes in the Trp…

A: Tryptophan is an essential amino acid, and the trp operon is a genetic regulatory system that can be…

Q: A mutation at the operator prevents the regulator protein from binding. What effect will this…

A: An operon includes a group of genes that have a common promoter, regulator, and would be transcribes…

Q: The lac operon of E. coli controls the expression of genes that code for enzymes involved in lactose…

A: The prokaryotic gene regulation is performed by the operon system. In this system the polycystronic…

Q: Which of the following conditions is most likely to result in an increase rate of transcription of…

A: Lactose in bacteria is called beta-galactoside which is used as energy and as a carbon source.…

Q: Which of the following statements can be made concerning the role of the lac repressor (Lac R) in…

A: The lac repressor is a protein that binds to the promoter sequence of the lac operon and inhibits…

Q: A strain of E. coli has the genotypes shown below at the lac operon, where I = regulator gene, P =…

A: Escherichia coli, is a gram negative bacteria thrives in intestine of all animals which are warm…

Q: hich operons would be functional under these conditions?   What repressors would be made? (NOTE:…

A: Operon is a regulatory unit consisting of cluster of genes containing operator promoter and…

Q: This figure represents the ABC operon, which is a negative inducible operon, and its associated…

A: ANSWER: Functional structural proteins formed in the presence of molecule A are: test 1, test 2 and…

Q: that

A: The trp operon found in E coli bacteria . It's a group of genes that encode biosynthetic enzymes.…

Q: The transcription of many bacterial genes relies on functional groups called operons, such as the…

A: Turning/switching genes on and off is referred to as gene regulation. Cells start to take on…

Q: The symbols A, B, C, D, E represent all the components of the lac operon, excluding LacA. The…

A: The lac operon regulates gene expression in lactose metabolism in E. coli. It is composed of a…

Q: Explain how the following conditions will affect the regulation of the operon. (3 pts) Low cAMP…

A: Lac operon is a mechanism seen in the E coli that enables the proper metabolism in its body. The…

Q: A haploid E. coli cell has the genotype I ¯ P+ O+ Z+ Y ¯ where the I ¯ indicates that the repressor…

A: The question is asking us to determine which statements are correct about an E. coli cell with a…

Q: You are growing E. coli in a laboratory in order to study their operons. The growth media you are…

A: The prokaryotic gene regulation is known as operon system in which the expression of polycystronic…

Q: To characterize the promoter of the gadA operon you made a series of deletion mutants removing…

A: Gad A gene expression is found in the bacteria. They have operon structure in which regulatory,…

Q: A number of mutations affect the expression of the lac operon in E. coli. The genotypes of several…

A: Operon is a segment of DNA that carry many genes along with regulatory elements. Lac operon contains…

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.