The trp operon vs. the lac operon: Which one of these is activated in the presence of a substance, and which is activated in the absence, and why the difference? In other words, what if the cell could think, what would be its rationale for why one is activated in the presence and the other in the absence of something? (Ignore the effects of glucose in the lac operon.)

Q: The TRP operon functions by attenuation. Briefly explain how attenuation works and why it is…

A: Trp operon or the tryptophan operon is a group of genes that are responsible for tryptophan enzymes.…

Q: A researcher was trying to determine whether two molecules (molecule A and molecule B) were co-…

A: CoRepressor - The function of the corepressor is to induce transcriptional silencing or to repress…

Q: 5g. A mutation has occurred rendering the regulatory protein unable to recognize the operator…

A: Operons are groups of genes involved in regulating a process and are transcribed as a single mRNA.…

Q: P₁0 ORF1 t₁ ORF2 ORF3 t₂ The diagram above illustrates an operon that is regulated by the RepR…

A: An operon is a group of genes and the regulatory elements that regulate the expression of those…

Q: It has been postulated that thiogalactoside transacetylase (LacA in the lactose operon) plays a role…

A: Introduction  An operon is a DNA functional unit that comprises a cluster of genes regulated by a…

Q: In the presence of lactose and the presence of glucose the lac operon is V [ Select ] Lacl is […

A: An operon is essentially a gene regulatory system in which a collection of genes coding for…

Q: Considering the Lac operon in E. coli, and chose what the expression of Lac Y would be in:  I) E.…

A: Lac l is the gene  which synthesizes repressor.Actually repressor is a protein that binds to the…

Q: ttenuator control of the Trp operon   what is the correct option from the choices below? involves a…

A: The trp operon, found in E. coli bacteria, is a group of genes that encode biosynthetic enzymes for…

Q: In terms of the efficient use of bacterial resources, explain why it is necessary for lac operon…

A: Lactose can be broken down by E. coli bacteria to produce glucose and galactose. The lac operon…

Q: Gal 4 is involved in the regulation of galactose metabolism. Describe how transcription would be…

A: Galactose is a common sugar in human diets. As a result, an epimerization reaction is needed for…

Q: 1d regulation of the lack operon by the lack repressor is an example of negative regulation. what in…

A: E.coli  bacterium intake glucose as a primary source of energy metabolism . When a glucose is scarce…

Q: Explain the function(s) of Hsp90. Name two factors which lead to the increase of this protein in…

A: Heat shock protein 90 (Hsp90) is a very prevalent molecular chaperone that is present in cells. It…

Q: -Discuss how the presence of glucose impacts the expression of the ara operon.

A: Introduction: The L-arabinose operon, which is called the ara or araBAD operon, for the breakdown of…

Q: For each of the following mutations in the lac operon, type a C if expression of lacZ would be…

A: The lac operon is a genetic system in bacteria that regulates the expression of genes involved in…

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: 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: . Why is a nonsense suppressor tRNATyr, even though ithas a mutant anticodon that cannot recognize a…

A: The aminoacyl-tRNA synthetases have recognition sites for amino acids, ATP (Adenosine triphosphate),…

Q: For your 25ul ligation reaction: You need to add 160ng of your digested insert DNA (which is at a…

A: Given: Total volume - 25ul. The DNA need to be added is 160 ng. One ul contains 160 ng of digested…

Q: regulation of the lac operon by cAMP-CAP complex is an example of positive regulation. what in…

A: They are transcription, translation, post-transcription and post-translation. Genes which code for…

Q: Consider a mutant of E. coli that has an inactivating mutation in the gene for adenylate cyclase…

A: Introduction The lactose operon (also known as the lac operon) is a group of genes present in E.…

Q: A missense mutation in one of the enzymes encoded by the trp operon prevents a bacterial cell from…

A:

Q: Predict a possible phenotype from the following mutations in the Lac Operon: a deletion in…

A: An operon is a functioning unit of DNA that contains a cluster of genes under the control of a…

Q: Resection of a bacterial chromosome in which genes for the enzymes of of a particular metabolic…

A: Genetic information is inherited to generations by means of DNA. The DNA has many genes that code…

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.