Which of the following is true?   a.     Enhancers are proteins that bind to activator DNA sequences.           b. Activators are proteins that bind to insulator sequences     c. Repressors are proteins that bind to enhancer DNA sequences.   d. Repressors are proteins which bind to silencer DNA sequencers.

Q: You are curious to identify the region of the gene X sequence that serves as an enhancer for gene…

A: Nascent RNA (ribonucleic acid) sequencing analysis is a tool for enhancer identification. Some…

Q: In E. coli, induction in the lac operon and repression in the trp operon are both examples of a.…

A: Transcription, translation, post-transcription and post-translation. The process in which the gene…

Q: Sigma factors recognize the _________ which then allows RNA polymerase to transcribe the ___________…

A: Nucleic acids are present inside the nucleus to store and pass genetic information and thus controls…

Q: A double stranded region of RNA that can stall ribosomes is a(n) A. repressor sequence B. operator…

A: The RNA is produced from the DNA by transcription process and this RNA is used during the…

Q: transcriptional repressor leading to decreased gene expression. a. chromatin remodelling complex…

A: Transcriptional repressors are the molecules that block/inhibit gene expression. They directly act…

Q: the best technique to answer the following question: Does GAL4 transcription activator bind to GAL3…

A: We can detect GAL4 transcription activator binds to GAL3 co-repressor via Bacterial two-hybrid…

Q: In gene silencing, the “dicer” enzymea. assembles siRNAs into a RISC complex.b. unwinds the RISC…

A: Introduction: Gene silencing is a mechanism to regulate the expression of genes. The gene silencing…

Q: Which of the following statements about gene regulation is false?   a. An operon contains DNA…

A: Introduction Gene expression is the process in which the genetic information present in the DNA…

Q: egulatory proteins in Prokaryotes shut off transcription by binding to a site immediately in front…

A: In the given question options are given in accordance to regulation of transcription in prokaryotic…

Q: Which of the following statements is not true of both the LacI and TrpR repressor proteins?a) an…

A: The objective of the question is to identify the statement that is not true for both LacI and TrpR…

Q: What is operant conditioning? A. Conditioning which is under the influence of operon regulated genes…

A: Operant conditioning is a type of learning in which behavior is strengthened or weakened by the…

Q: Which of the following statements uses the term homologous correctly?A. The two X chromosomes in…

A: Homologous genes refer to the genes that are inherited in two species by a common ancestor. These…

Q: Positive regulators are called: A. Repressors  B. Activators C. Enhancers D. None of the above

A: Transcription is a process by which the RNA is synthesized from the DNA sequence. RNA polymerase is…

Q: Components necessary for regulating the /trp/ operon do NOT include

A: Answer - Option E - CAP protein

Q: What is one reason the rod-cone break occurs?     The rods adapt more quickly.     The cones…

A: Visual adaptation denotes the retinal ability to adjust or adapt to different levels of light. Rods…

Q: In the table below the product of gene R binds to the promoter of gene A. What happens in (b)? a.…

A: Positive regulators are structural components that allow RNA polymerase to attach to the promoter…

Q: The gad operon is controlled by a number of transcription factors that regulate a promoter of…

A: Bacteria re found in prokaryotes. They are more primitive as compared to eukaryotes.

Q: Specific transcription factors in eukaryotes interact with enhancers, which may be a long distance…

A: Transcription is the process by which mRNA is transcribed from double-stranded DNA. The core enzyme…

Q: How does the lac operon regulate lactose digestion in bacteria?a. The repressor protein becomes a…

A: The lac operon of E. coli contains genes concerned with lactose metabolism. It's expressed only if…

Q: What is the role of a substrate that controls a repressible operon?   a. increase the production…

A: Operon is the segment of DNA. It consists of structural genes, regulatory, promoter and operator…

Q: Assembly of transcription initiation complexes is mainly controlled by

A: Assembly of transcription initiation complex is a process of bringing together all the components…

Q: The reason LacZ is frequently used as a reporter gene is: a. The lacZ gene product binds to the…

A: LacZ is a gene of lac operon which codes for β-galactosidase. The reporter genes cause a visible…

Q: In experiments in which rat embryo fibroblasts are transfected with suspected oncogenes,…

A: Myc gene basically a proto-oncogene that play a key role in cell cycle progression, cellular…

Q: How will this modified cro protein interact with the three OR sites, and how would cro expression be…

A: Bacteriophages are viruses that infect bacteria. Like other viruses bacteriophages are also made up…

Q: You are working as a protein engineer. You decide to work on lacl protein ( This is the repressor…

A: An operon is a cluster of genes under a single promoter. The gene products of genes in an operon are…

Q: How does exposing an E. coli cell to glucose affect the regulation of the lac operon via CAP? a.…

A: Catabolite activator protein (CAP) impacts the expression of the lac operon based on the catabolites…

Q: Which of the following statements about methylation and acetylation is correct? A. Genes that have…

A: Introduction Deacetylation is the removal of an acetyl group and occurs on a plethora of targets and…

Q: Under the following conditions, what will be occurring with the lac operon? Glucose: Present…

A: lac operon is present in E.coli and contain genes that control lactose metabolism and only active…

Q: In a bacterial operon, the active repressor bind to the   A. promoter.   B. terminator.   C.…

A: The operon concept can be defined as a DNA containing a set of genes that are transcribed basically…

Q: What is the difference between a structural gene and a regulator gene? a. Structural genes are…

A: Gene is the hereditary unit occupying a specific position in the chromosome and carries…

Q: Eukaryotic cells have multiple complex mechanisms for the regulation of gene expression, but a…

A: Answer :- a) Operons Explanation - Eukaryotic genes aren't organized into operons, therefore every…

Q: Operons involved with the biosynthesis of molecules such as amino acids are most likely to be…

A: A repressible operon encodes for anabolic enzymes. The genes that encode these anabolic enzymes tend…

Q: Identification and quantification of expressed genes initially requires a. reverse transcription of…

A: Gene is a basic unit of heredity and a sequence of nucleotides in DNA that encodes the Synthesis of…

Q: In the yeast GAL system, the UAS is a(n) ___________________ and GAL4, the protein that binds to the…

A: GAL4-UAS This system is a biochemical method that is involved in evaluating the expression of genes…

Q: You are studying a bacterial plasmid that contains 3 operons and 9 genes. How many transcriptional…

A: In bacteria, similar and related genes are often found in a cluster on the chromosome, where they…

Q: Which of the following is true about operons?   A. Contains a cluster of genes transcribed as…

A: An operon is a functional unit of transcription and genetic regulation, which occur primarily in…

Q: Which of the following is an example of positive control? (a) transcription occurs when a repressor…

A: A positive control is described as an integral part of an experimental that has a tendency to…

Q: . Dosage compensation is necessary because a. some regions of the genome contain more genes than…

A: Introduction : Heterochromatin is the darkly stained part of chromatin. The heterochromatin is…

Q: Why is it adaptive for a bacterium to not express the genes that encode that lactose utilization…

A: Bacterial adaptability is tightly controlled genetically and involves the expression of several…

Q: What does it mean for a transposable element to be effectively “dead”? A. The transposable elements…

A: A transposable element is a DNA sequence that can change its position within a genome

Q: The E. coli lacZYA región will be transcribed at a rate greater than the low basal rate if: A.…

A: In lac operon, there are a set of genes that regulate the metabolism of lactose in the E.coli…

Q: A mutation occurs in the lac operon operator site such that LacI can no longer bind to the operator…

A: Lac I stands for lac inhibitor. It's major function is to turn off the lac operon in the absence of…

Q: If there is a mutation in importin that prevents it from interacting with the NLS of cargo proteins,…

A: Importin is a protein that transports various substances to nucleus via nuclear localization signal.…