Lacl gene product is or does all of the following except A regulates expression of Lac ZYA B is a diffusible, trans-acting regulator. is a positive regulator of Lac ZYA is a negative regulator of Lac ZYA

Q: Relative Relative H3/H4 Acetylation Relative H3 Acetylation H4 Acetylation DON -4Kb -3Kb -2Kb -1Kb…

A: DNA is responsible for carrying genetic information in cells. DNA is packaged into condensed form…

Q: Imagine that you are studying the promoters of genes in E. coli. You notice that genes that are…

A: Lac operon in E.coli. is negatively inducible operon. It has 3 structural genes - LacZ - encodes…

Q: Please explain the role of the SRP, SRP receptor and the protein translocator in the synthesis of a…

A: After the proteins has been translated, it needs to be send to different areas in the cells to carry…

Q: What would be the likely phenotypic effect of a mutation in HOTAIR and prevented it from binding to…

A: HOTAIR (HOX antisense intergenic RNA) is a long non-coding RNAs with 6 exons and 2158 nucleotides…

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: Discuss how the expression of a protein can be regulated post transcription in eukaryotic cells…

A: The eukaryotic cell after transcription called the primary transcript is not considered as messenger…

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: please explain how does INRNA modify the structure of the chromatin in order to regulate gene…

A: Chromatin is an organized structure of DNA and protein that is found in the nucleus of eukaryotic…

Q: These are protein regulators in ER which control the proper folding of newly synthesized or…

A: Endoplasmic Reticulum is a network of tubules present in the cytoplasm. It is present in two forms-…

Q: Mutations outside of the coding region of a gene can have an effect on the expression of the gene.…

A: Mutations can be defined as a change in nucleotide sequences. It can occur either due to error…

Q: plus or ninus in each box to show that the cell will make, or will not make, tunctional Beta…

A: Lac Operon is the segment of DNA which controls the metabolization of lactose. It consists of…

Q: As discussed in Lipids 3, SREBPs are a type of transcription factor involved in lipid homeostasis.…

A: The full form of  SREBPs is Sterol regulatory element binding proteinsSREBPsare composed of two…

Q: Which statement is correct about expression of a gene regulated by Gal4? O Galactose increases gene…

A: In yeast the transcriptional activator GAL4 binds to the upstream activating sequence of the gal…

Q: Define SCF-proteasomedegrades phosphorylatedS phase CDK inhibitor

A: Misregulation of any aspect of the cell cycle may lead to developmental defects and diseases such as…

Q: Explain how glucose represses the lac operon.

A: Operons can be defined as the regions of DNA that contain the clusters of related genes. They are…

Q: Explain how RNA-binding proteins regulate the translationof specific mRNAs, using the regulation of…

A: The cellular iron content is maintained by the IRP-IRE regulatory mechanism. IRPs are cytosolic…

Q: Presence of proximal and distal promoters in Drosophila melanogaster for alcohol dehydrogenase. Is…

A: Drosophila melanogaster is a species of fly in the family Drosophilidae. The species is often…

Q: A protein or RNA that regulates gene expressionin trans—either at the level of transcription,…

A: Trans-acting factors include proteins and RNAs that regulate gene expression in an organism. Their…

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: Referring to Figure 18.5, predict what would happen if the SRPRNA was unable to stimulate the GTPase…

A: Its primary objective is to locate SRP units. SRP (signal recognition particle) is a molecule that…

Q: 1. The following image shows a mechanism in which gene expression activity is regulated by ligand.…

A: In prokaryotes, the synthesis of the gene's transcript and its encoded protein product is termed…

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: Based on the information in Figure 12-6, how doesGal4 regulate four different GAL genes at the…

A: The gal operon is a prokaryotic operon that codes for galactose metabolism enzymes. Lactose…

Q: The use of an SH2 domain binding inhibitor would be predicted to: O Decrease binding of SOS with RAS…

A: In the cellular response, the SRC homology (SH2) 2 domain is considered as the protein, which is…

Q: Stimulation of map kinase can help regulate cell division and cell mass. the following effects of…

A: Mitogen-activated protein kinases (MAP kinase) are protein kinases that autophosphorylate dual…

Q: . What type of mutation of the lac repressor might be both constitu- tive and trans-dominant?

A: Trans-Dominant- A mutation in a regulatory gene that can control the expression of a structural gene…

Q: . Cells containing missense mutations in the crp gene(encoding the positive regulator CRP) are Lac−,…

A: Genetics is a branch of science that deals in the study of genes, heredity, and genetic variation of…

Q: Indicate whether the protein binds directly or indirectly (assuming it does) to DNA and whether to…

A: Introduction :- DNA acts the genetic material of the cell because it have all the genetic…

Q: en prior to stem cell transplant may be associated with gonadal failure. Risk is least with…

A: Chemotherapy is a cancer treatment that uses powerful drugs to kill or slow down cancer cells. It…

Q: A R145D mutation in CPA would have as compared to the wild type. O increased KM O decreased kcat…

A: Km defines the binding affinity of an enzyme towards a particular substrate. Higher is the Km value…

Q: Erythritol is a natural sugar abundant in fruits and fermentingfoods. Pathogenic bacterial strains…

A: Erythritol is a natural sugar abundant in fruits and fermenting foods. Pathogenic bacterial strains…

Q: A loss of function mutation in the gene for the yeast regulatory protein GAL4 causes yeast to grow…

A: Regulatory protein GAL4 GAL4 regulatory protein in a positive regulatory protein. When it binds with…

Q: GC (Glycocorticoids) binds to the glucocorticoid receptor (GR), which leads to the transcription of…

A: Receptors are structures made of proteins that transduce signals in the cells upon binding of the…

Q: Describe the regulation of the lac operon by lac repressor and CAP.

A: Operon acts as a single regulated unit having one or more structural genes, a promoter gene, a…

Q: ses (HA Is) transfer acetyl groups from acetyl CoA to lysine residues on histones What is the…

A: Histone acetyltransferase (HATs) are enzymes that acetylate conserved lysine amino acids on histone…

Q: Regulation of gene expression in eukaryotes can occur:

A: Transcription is the formation of mRNA from DNA.It occurs in nucleus. The translation is the…

Q: distinguish between IS and Tn transposableelements

A: The gene in prokaryotes and eukaryotes that are capable of moving from one position to another…

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.