How does transcription factor D establish the top of the top-bottom axis of developing flies if it is present in similar numbers in all cells? O Ca++ moves from bottom to top in flies O Another signal causes it to move into the nucleus only in top-defining cells O Its target genes are only in cells that establish the top of the fly Promoters of transcription factor Dare unique to cells that establish the top O ATP is only available in cells that establish the top of the fly

Q: ne epidermal growth factor receptor (EGFR) activates a complex signaling network - increase…

A: The example shown in the question shows the ligand binding and the cascading of effects that is…

Q: Genistein is a compound found in soybeans that is known to increase the expression of a protein…

A: Breast cancer is a agressive type of cancer with high malignant potential but due to advancement in…

Q: Which of the following is a method to reprogram a cell to de-differentiate fibroblast into a…

A: De-differentiation of fibroblast cells into pluripotent stem cells.

Q: Regulation of transcription is mediated by proteins that first must bind to specific…

A: Hi dear,here is your answer. Gene expression is defined as the process by which the information that…

Q: eukaryotes control transcription

A: Transcription in the eukaryotic cells is controlled by various ranges of regulation in which the…

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: Name the lambda promoters whose expression is regulated by the cro protein. For each promoter you…

A: CI represses cro and Cro represses cI. This is referred to as the double-negative feedback loop and…

Q: You have isolated a strain of mutant yeast cells that divide normally at 25 degrees Celsius but…

A: Cell division is a normal process that occurs in all living organisms to produce new cells to…

Q: What event in eukaryotes serves as the "trigger" for entering the elongation phase of transcription…

A: Transcription occurs in the three steps—initiation, elongation, and termination. The elongation…

Q: How does the GA(T>C)A mutation in the Duffy promoter impact Duffy transcription? GACA enhancer does…

A: Duffy is a gene which expresses a protein called duffy protein. This protein act as membrane bound…

Q: which of the following correctly describes how protein kinase A can activate genes? A: nuclear…

A: By activating cAMP-dependent protein kinase-A (PK-A), which is activated when cAMP binds to the…

Q: Which of the following mechanisms may be involved when PRC1complexes silence gene expression?a. The…

A: The process of genic expression is used to direct the assembled protein molecule with the encoded…

Q: to that in humans. The molecule that is most similar in function to the bicoid and the molecule that…

A: Introduction Transcription is a process in central dogma where the DNA strand is transcribed into a…

Q: Enhancers in eukaryotic genomes such as glucocorticoid response elements can upregulate multiple…

A: An Enhancer in Eukaryotic genomes is defined as the DNA sequence which promotes the transcription.…

Q: The following are examples of how eukaryotic cells may control gene expression small RNA molecules O…

A: The eukaryotic genome is huge and consists of millions of base pairs. It is highly packed in…

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: Which of the following applies to the female sex determination in Drosophila melanogaster fruit…

A: Sex-lethal (Sxl) is the master switch gene for somatic sex determination in Drosophila melanogaster.…

Q: The enormous complexity in initiating eukaryotic gene transcription seems at first glance to be…

A: Gene expression is a process in which the genetic instructions of genes are utilized to manage…

Q: Four terms and statements related to gene regulatlon Match the correct term to each of the four…

A: According to the question, four terms and statements are related to gene regulation in bacteria are…

Q: The early Drosophila embryo is a syncytium. Why is this significant? O a. it allows the segment…

A: The early Drosophila embryo is indeed a syncytium, which means it is a single cell with multiple…

Q: Given the following genetic network of a putative clock- controlled genes network that are regulated…

A: RNA Binding Proteins:  RBPs (RNA-binding proteins) are proteins that bind to double or single…

Q: How can an enhancer that regulates expression of a given gene be active in one tissue but inactive…

A: Enhancers, also known as transcription factors, are DNA regulatory elements that can be bound by…

Q: Draw a diagram to illustrate how a concentration gradient of a transcription factor along the…

A: In drosophila the anterior posterior axis is determined before birth due to its maternal effects…

Q: A brain scan of an epileptic patient shows that the patient has clusters of neuronal cell bodies…

A: The presence of clusters of neuronal cell bodies in posterior periventricular zone is due to a…

Q: A mutation in the trp repressor gene that prevents the apo-repressor from binding the co-repressor…

A: Tryptophan operon Tryptophan operon is negatively regulated operon, it includes five gene, promotor,…

Q: JCVere ueveloph developmental

A: A cell to cell interaction is the direct communication of the surfaces of the cell which is…

Q: Which of the following statements is/are true about gene regulation in bacteria? Choose all that…

A: Gene regulation refers to the mechanisms that act to induce or repress the expression of a gene. It…

Q: Assume researchers are able to isolate the intact mRNA for a gene called qrs. The qrs mRNA isolated…

A: Messenger RNA is synthesized with the help of RNA polymerase taking the help of template strand of…

Q: Lacl gene product is or does all of the following except A regulates expression of Lac ZYA B is a…

A: LacI is one of the genes present in Lac operon which codes for a lac repressor. This lac repressor…

Q: Which of the following is NOT a reason cells regulate gene expression at a level other than the…

A: Introduction :  A functional gene product is created through the process of gene expression…

Q: g protein D. Growth factor receptor ng Tool 0 Q ing C. Growth factor-binding protein D. Growth…

A: The question is asking about the type of protein produced by the Rb gene, which is located at the…

Q: Which of the following is not true? ○ In a somatic cell, imprinted genes are not expressed because…

A: Here's the analysis of each statement:In a somatic cell, imprinted genes are not expressed because…

Q: The transcription of a gene called YFG (your favoritegene) is activated when three transcription…

A: An enhanceosome is a group of trans-acting factors that assemble at an enhancer region of a gene to…

Q: The transcription factor Pax6 is required continuallyduring the life of a mouse (or a human) for the…

A: Pax6 is a kind of transcription factor which is required for the development of retina in mouse and…

Q: W die Capabie transcriptional activation? H2B H3 Н4 All of the above

A: Histones are alkaline (fundamental pH) proteins. They are found inside the nucleus of eukaryotic…

Q: Can one transcription factor sometimes act as a repressor and sometimes act as an activator? O a.…

A: We are authorized to answer only one question at a time, since you have not mentioned which question…

Q: How does the GA(T>C)A mutation in the Duffy promoter provide malaria resistance? Podused Diff

A: A protozoan parasite and human pathogen that most frequently causes malaria is known as Plasmodium…

Q: O A. Screen thousands of strains for a spontaneous unc-22 mutation O B. Soak worms in mutagenic…

A: In RNA silencing microorganisms are used to silence or negatively affect the gene expression. It is…

Q: What is the predicted function of the Duffy gene? O Cell Adhesion Molecule O Microfilament RNA…

A: Gene is the basic structural and functional unit of heredity. A gene exists as two alternative forms…

Q: of 16 CAT proteins signal in a manner that is uncommon for signaling proteins that carry out similar…

A: STAT or signal transducer and activator of transcription  proteins are latent cytoplasmic…

Q: In which of the following scenarios is the signal a positive regulator of gene expression?

A: The right option is : None of them

Q: Fruit flies with DNA transposons known as P elements are known to have 1.gene silencing factors in…

A: P elements - these are transposable elements  that were discovered in drosophilia as the causative…

Q: The TBX20 transcription factor is important for the developmentof heart tissue. Deletion of the…

A: T-box transcription factor Tbx20 gene in mice is essential for prenatal cardiomyocyte proliferation…

Q: Many genes whose expression is turned on by DNAdamage have been isolated. Loss-of-function mutations…

A: The lex A gene encodes a repressor protein and is involved in controlling the DNA repair, inhibition…

Q: How is the expression of genes controlled at the chromosomal level?   A. DNA can synthesize extra…

A: Control of gene expression is an important phenomenon occurring at the molecular level that plays a…

Q: Which of the following is NOT true about cis-regulatory elements (CREs)? Group of answer choices…

A: Non-coding DNA sections called cis-regulatory elements (CREs) control the interpretation of…

Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.