What enzyme is required to form a prophage, andwhat are the two main transcriptional repressors thatcontrol whether lambda proceeds to lysogeny or lysis?

Q: What would be the most likely effect of inhibiting the translation of hunchback mRNA throughout a…

A: A gene is the basic functional, and physical unit of heredity and it is small sections of DNA that…

Q: How do enhancers and transcription factors interact to regulategene expression?

A: Genes are the stretch of the DNA that code for a specific polypeptide chain.

Q: What are the different transcription factors of Eukaryotes and give their function.

A: Answer: Introduction: Eukaryotic cellular process is regulated in the transcription process and RNA…

Q: What does the allostery of the regulatory protein enable?

A: The catalysts that are present in the livings cells are called enzymes. The enzymes are protein…

Q: What are some other ways that a cell controls which genes are expressed?

A: Introduction  A gene is nothing but a specific sequence of deoxy ribose nucleotides and which is…

Q: Describe three types of genetic changes that commonly convert aproto-oncogene to an oncogene.…

A: The genetic alteration results in the advantage in growth of the cell. The 3 genetic change…

Q: How does Elongation Factors Regulate the Initial Stages of Transcription in the Promoter-Proximal…

A: Transcription is defined as the process of copying a DNA segment into RNA. The segments of DNA that…

Q: Using CREB and nuclear receptors as examples,compare and contrast the structural changes that…

A: Transcription factors are defined as the protein responsible for controlling the transcription rate…

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: What are the advantages of having both an activatorand a repressor protein?

A: Gene expression is regulated by the turning off of the expression of genes when they are not…

Q: in a fat cell what is the result of activation of genes by PPAR gamma/activator proteins binding?…

A: Peroxisome proliferator - activated receptor(PPAR) gamma is a  nuclear receptor of subfamily 1,group…

Q: Amude cel and a skm cel both cartan the same 45 chromosomes, but express d fferent genes. In terms…

A: Muscle cells and skin cells are examples of differentiated cells. The functions of both cells are…

Q: How might nucleosome eviction affect transcription?

A: If the nucleosome is repositioned from its original place. Two possibilities might be seen- 1)The…

Q: What does a suppressor mutation suppress? What is the differencebetween an intragenic and an…

A: Mutation, an alteration in the genetic material of a cell of a living organism or of a virus that is…

Q: How does alternative splicing affect TRNT1?  What evidence do you have?

A: TRNT1 is a tRNA-nucleotidyltransferase 1 enzyme coded by gene TRNT1 in human. It helps to provides a…

Q: How chromatin remodeling and chromatin modifications are necessary to make cis-acting regulatory…

A: In past few years, for the identification and characterization of the ATP-dependent…

Q: During certain stages of development, the requirement forcertain gene products may require gene…

A: A gene is a stretch of nucleotides present in the DNA. It codes for the synthesis of an RNA or…

Q: What is the effect of supper repressor (lacI^s) mutations?

A: Lac operon is a transcriptionally regulated system in E.coli which enables the bacteria to utilize…

Q: How could the expression of Lactase RNA be turned on and off by transcription factors, activators,…

A: Ans-  Transcription factors are proteins that bind to neighboring DNA and help switch particular…

Q: Describe the cis-acting elements that control tissue-specific transcription of eukaryotic…

A: Step 1 Transcription is the formation of RNA (ribonucleic acid) over the template of DNA…

Q: what prevents any enhancer on a chromosome from influencing any promoter for any gene anywhere on…

A: A promoter is a region on DNA to which the proteins that initiate transcription of a single RNA from…

Q: Which molecules act as co-repressor for pur respressor in prokaryotes?

A: Co repressor- It's a substance which inhibits the gene expression.A co repressor downregulates the…

Q: Remember that DNA viruses inactivate tumor suppressor genes resulting in cancer. In Burkitt’s…

A: Translocation of c-myc occurs to one of the immunoglobulin foci. This leads to over expression of…

Q: How does the poliovirus protease 2Aro inhibit the expression of cellular genes?

A: Poliovirus 2Apro is a protein comprised of 149 amino acids that belong to the cysteine protease…

Q: What are the major differences between a repressor protein anda riboswitch in the control of gene…

A: The riboswitch acts as a regulatory mechanism of translation process, which resembles as an…

Q: What has to happen for the expression of two differentgenes on two different chromosomes to be…

A: A gene is a specific sequence of nucleotides in DNA or RNA that is usually found on a chromosome and…

Q: Cells go to great length to correctmistakes in the processes of DNAreplication, transcription,…

A: When Errors in Replication Become Mutations After the next cell division, incorrectly coupled…

Q: Describe the functions of the RAG1 and RAG2 and NHEJ proteins.

A: Deoxyribonucleic acid (DNA) is a long molecule. DNA contains the instructions an organism required…

Q: What are the opposing roles of Ubiquitin and Proteosomes versus Chaperone Proteins in the cell in…

A: Proteins are the polymers of amino acids bonded by the peptide bonds. These play important role in…

Q: How the transcription of one gene can be regulatedby the interplay of multiple promoter and enhancer…

A: Different macromolecules such as carbohydrates, proteins, lipids, nucleic acids are present in the…

Q: How do the λ repressor and the cro protein affect the transcriptionfrom PR and PRM? Explain where…

A: Two major paths exist for viral life cycles: lytic and lysogenic. Infections that lead directly to…

Q: What events does the RecA protein facilitate?

A: Introduction  DNA strands is composed of nucleotide base pairs sequence such as Adenine, guanine…

Q: Define inducer and repressor.

A: The gene expression results in the production of a functional protein. The synthesis of protein…

Q: How do we know that core-promoter elements are importantfor transcription?

A: A gene is the essential physical and functional unit of heredity. They are comprised of DNA…

Q: Describe the manner in which activators and repressors influencethe rate of transcription…

A: Introduction  Protein is the key biomolecule in the biological system, any important physiological…

Q: What are the exact factors that can cause Post transcriptional modification of cytoskeletal protiens…

A: Cytoskeletal proteins are defined as the proteins that compose the cytoskeleton, flagella, or cilia…

Q: Mechanisms that inhibit TE activity include theproduction of transposition repressors…

A: Transposable elements (TEs) are the small segments of DNA that can move from one position to other…

Q: How enhancers influence transcription of eukaryotic genes ?

A: How a cell regulates which genes out of several in its genome are "turned on" is known as gene…

Q: What Control ElementsRegulate Expression ofthe mPGES-1 Gene?

A: The mPGES-1 gene in humans is responsible for encoding an enzyme involved in the synthesis of…

Q: Why would a translocation that put Ras behind the promoter region of the actin gene lead to the…

A: Protooncogenes are activated by mutations that cause structural changes in their encoded proteins.…

Q: How dispersed promoters specify multiple transcriptional start sites ?

A: Answer:Introduction: In vertebrates, approximately 70% of genes contain dispersed promoters, that…

Q: What general transcription factors associate with an RNA polymerase II promoter in addition to the…

A: Transcription is the process of synthesis of mRNA from DNA. RNA polymerase is the enzyme which carry…

Q: How is the alternative splicing of Robo3 temporally regulated during midline crossing?

A: Alternative splicing is a mechanism which increases the complexity of gene functions in many…

Q: how does phosphorylation of eukaryotic transcription factors regulate the function, using two types…

A: Introduction - Phosphorylation is a biological process in which phosphate is added to an organic…

Q: What is a major difference between activator proteins and repressor proteins

A: Activator proteins can have binding sites for ligands (such as CAMP), but repressor proteins only…

Q: How Distant Enhancer Sequences andInteractions with Chromatin InfluenceEukaryotic Promoters?

A: The promoter is the region of a gene sequence that binds to the RNA (ribonucleic acid) polymerase.…

Q: How is it that only a few transcription factors can initiate cell type specific gene expression?

A: Transcription is the process of copying (transcription) a gene's DNA sequence into an RNA molecule.…

Q: Can Gene Expression Be Regulated Oncethe Transcript Has Been Synthesized?

A: Introduction: The working part of DNA that mainly codes for a protein is a gene. The process by…

Viral Replication

The virus is acellular and considered non-living outside the host cell. The replication of the virus occurs only inside the living cells. Only a few genes are present in the smallest virus, whereas many genes are present in the largest virus. These genes encode specific viral proteins.