Pre-initiation complex (PIC) is formed right before the initiation of genes, which of the following steps seemes to NOT help for the PIC formation O TBP protein to recognize TATA box at promoter region O TFIIA to recognize the TAFS in TFIID O Enhancers to attract coactivators and activators O Silencers to attract repressor and corepressors

Q: Model 1: What conditions would need to be present in the cell in order to reverse the regulatory…

A: The operon is the system that explains the regulation of gene expression in terms of switching “on”…

Q: promoters Insulators are particular that control access of enhancers to translation transcription…

A: Introduction  Gene expression is the process through which information from a gene is used to create…

Q: In fruit flies, the sex development gene contains six sections. If sections 1,2,3,5, and 6 are…

A: Fruit fly is commonly known as Drosophila melanogaster and is typically used in research owing to…

Q: The trp repressor binds to the operator region of DNA as a dimer (two repressor protein subunits…

A: The trp operon regulation is a repressible system. When the effector molecule binds to the…

Q: Describe transcriptional components in E. coli for each step of transcription, explain each subunit…

A: In Prokaryotes the process of translation is not complex as the Transcription and Translation both…

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: Sigma factors: O Are used to express only housekeeping genes in bacteria O Are used by bacteria to…

A: The production of RNA from the DNA template is known as gene expression or transcription that occurs…

Q: The TATA box is located at which region of the promoter? O Position 0 O Position -35 O Position -10…

A: A TATA box is a DNA sequence that tells how to read and decode a genetic sequence. It's a form of…

Q: ne of the main lessons of this chapter is that several bacterial genes are often transcribed from a…

A: As given: Several bacterial genes are often transcribed from a single promoter into a large…

Q: Describe how the lac operon represents an on/off switchfor gene expression.

A: The genome of the prokaryotic organism such as bacteria is polycistronic which means the many genes…

Q: The trpL sequence in the trp operon encodes O a poly-A tail addition sequence O rho termination…

A: Answer :- several codons for the amino acid trp  Because the in the  E. coli operon that is the…

Q: only in cell biology the Lac operon in bacteria encodes proteins required to import and digest the…

A: The lac operon, also known as the lactose operon, is found in E. coli and other intestinal bacteria.…

Q: The cI protein in bacteriophage l (lambda) is a transcriptional regulator - name the promoters in…

A: cI is a transcription inhibitor of bacteriophage Lambda. It is also known as Lambda Repressor and is…

Q: You are studying a new gene that is expressed within the adipose tissue of humans during the…

A: "Genes" can store genetic information in the form of DNA, which may be converted into functional…

Q: Which of the following is least related to the other items? Group of answer choices inducer…

A: 1) Inducer regulate gene expression. It activate transcription of a gene by inactivating repressor.…

Q: "The design of trans-Tango is modular, so it is not limited to tracing experiments. Since the…

A: It is certainly possible to further advance the trans-Tango system to label third-order neurons,…

Q: A control region was deletion mapped and shown to have three enhancers: A, B and C. Enhancer binding…

A: Transcription factors are usually the proteins that binds to the DNA either to activate the…

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: In rho dependent transcription termination the rho factor binds to? You have a 18 ml sample of…

A: Introduction :- A zygote is the initial cell formed when two gamete cells (sperm and egg) fuse…

Q: In the figure below, what is represented by the line labeled A? TFIIB recognition element DNA in m…

A: Transcription of genes includes the formation of RNA using the template DNA. It includes the enzyme…

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: Complete the table to figure out if transcription is happening or not.   Glucose Lactose LacI…

A: Operons are a combination of genes that function together to regulate the transcription of…

Q: Which of the following factors DOES NOT affect pluripotency? O DNA Acetylation Oct4 Nanog miRNA's…

A: Pluripotency is the ability of stem cells to differentiate into all the cell types of an organism.…

Q: Provide the SIGNIFICANT differences between the following

A: The process by which a cell regulates the conversion of DNA to RNA (transcription) and hence…

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: According to the scenario shown, how many segments of DNA (one, two, or three) are removed during…

A: Genetics is the branch of biology which deals with genes, heredity, and genome in the organism.…

Q: RNAP can access the lacZ promoter irrespective of whether CAP-CAMP is binding the CAP o True False

A: Lac operon is a set of structural genes regulated by a common promoter. It is found in bacteria.

Q: Part A If E. coli bacteria are placed in an environment that contains both glucose and lactose, the…

A: When glucose concentrations are low, E. coli can use other sugars as fuel. The c AMP-CAP protein…

Q: ferR ferP. ferS ferI ferZ KEY: O = operator P = promoter Boxes = structural genes Arrows =…

A: An operon is the unit of bacterial gene expression and regulation. The operon contains the…

Q: sulators can block the effects of enhancers only when they lie upstream of a promoter within the…

A: Genetics is the branch of biology that deals with the study of genes, their inheritance patterns,…

Q: Proteins that increase the efficiency of RNA polymerase binding to the promoter are called O…

A: Gene expression is increased with binding of RNA polymerase to gene promoter and then initiate…

Q: As shown in Figure 13-22, how many different transcription factors govern where the Distal-less…

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

Q: 1. (a)  Binding of inducer protein to repressor protein     Gene is switched ON     Gene is…

A: Gene regulation is done with the help of the regulatory protein binding with the regulatory sequence…

Q: In which strand is the promoter? 5' TCATGAGATA GCCATGCATA TCTAGTATGT AGGCATCTGA GTTTATATCT CA 3' 3'…

A: Phosphodiester linkages connect DNA strands, which are polymers or chains of deoxynucleoside…

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: The DNA sequence before the protein coding region that determines when a gene is used is called the…

A: DNA is the genetic material of many organisms including the humans. The DNA contains information…

Q: In eukaryotes, transcription factor activators bind to their enhancer elements and interact with RNA…

A: Transcription factors These factors are responsible for the process of transcription. These proteins…

Q: the lac operon, the lac genes are transcribed in the presence of lactose because   a RNA polymerase…

A: Reasons:  A.RNA polymerase binds to the operator RNA polymerase binds to the promoter region with…

Q: Contrast the effects of mutations in genes encoding sporulation-specific sigma factors with…

A: Introduction Mutation in sigma factors:- Sigma factors are subunits of all bacterial RNA…

Q: Given the Table below concerning the lac operon, match the letter with what would be occurring for…

A: The lac operon is a genetic system found in bacteria, such as E. coli, that regulates the expression…

Q: a) Tryptophan-repressor complex binds to operator     Gene is switched ON     Gene is switched OFF…

A: The tryptophan operon , required for the synthesis of the amino acid tryptophan, is an example of a…

Q: A regulatory sequence of eukaryotic DNA that is 10,000 base pairs away from the gene it regulates is…

A: The mechanism by which the information encoded in a gene is used to guide the assembly of a protein…

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.