12) The top operon in E. coli is a group of genes that control the biosynthesis of tryptophan. Concerning regulation of trp operon true or false: Low levels of tryptophan in the cell inactivate the repressor and RNA polymerase cannot bind to the promoter site. In the absence of tryptophan, the repressor is active, and the structural genes are not transcribed. in the presence of tryptophan, the repressor is inactive, and the structural genes cannot be transcribed. High levels of corepressor tryptophan block transcription. Attenuation causes RNA polymerase to stop prematurely. ) The repressor of the trp operon is activated by the presence of lactose

Q: please answer Why is it useful to have two different mechanisms of positive regulation? I.e. why…

A: The L-arabinose operon, also called the ara or araBAD operon, is an operon required for the…

Q: Which of these epigenetic changes could lead to reduced transcriptlon gene? Please make sure to…

A: Epigenetics is the study of changes in organisms produced by changes in gene expression rather than…

Q: The TRP operon functions by attenuation. Briefly explain how attenuation works and why it is…

A: Trp operon or the tryptophan operon is a group of genes that are responsible for tryptophan enzymes.…

Q: Explain and give an example (trp operon) of how repressor operons function in prokaryotes.

A: Repressor binding physically  blocks RNA polymerase from transcribing  structural genes.

Q: Transcriptional regulation is important for organisms to respond to their environment. Some of the…

A: Transcription is a process through which the DNA encoding a gene gets transcribed into mRNA. For the…

Q: Please describe in full detail how the LAC operon is controlled by both negative gene regulation and…

A: Lac operon is a gene controlling nit which contains operator, promotor and structural gene region.…

Q: Please help me iwht this question explain how the regulation of the Lac Operon incorporate both…

A: An operon includes a group of genes that are expressed under the same promoter.

Q: The process in which the two-dimensional structure of RNA from the L region of an operon can either…

A: The strategy of creating an RNA duplicate of a grouping is transcription. The transcript, known as…

Q: Give the result(s) of the experiment in "MicroRNAs Control De Novo DNA Methylation Through…

A: INTRODUCTION MicroRNAs (miRNAs) are a class of small, single-stranded non-coding RNAs that regulate…

Q: Electrostatic interactions between positively and negatively charged protein surfaces are the only…

A: Let's explore the above questions are true or false.

Q: (Theme 5) You are testing the role of three proteins (Protein A, Protein B, and Protein C) which…

A: The electrophoretic gel electrophoresis mobility shift assay is also known as EMSA.This assay is…

Q: methylmalonic acidemia

A: Introduction  Methylmalonic Acidemia - Methylmalonic acidemia is a problem wherein the body can't…

Q: This question is regarding the 6 areas that can be involved in the control of gen expression: Part 1…

A: Gene expression is the transcription of a gene into mRNA and its subsequent translation into…

Q: Answer the following questions based on the lac Operon metabolic pathway.

A: Gene Regulation In prokaryotes , control of the rate of transcription is the site for control of…

Q: c) Mention to two biochemical procedures that can provide information about CAP and LacR binding to…

A: The lac repressor LacR acts as a lactose sensor and blocks transcription when lactose levels are…

Q: Please discuss positive regulation with respect to lac operon.

A: An expression of a gene is evidenced by the synthesis of the polypeptide chain encoded by the…

Q: control medium that demonstrates the general growth rate of mutant candidates

A: Control Medium: This medium is used to demonstrate the general growth rate of mutant candidates in…

Q: operon

A: Answer: Operon: In genetics, an operon is a functioning unit of DNA containing a cluster of genes…

Q: The polycistronic Histidine Operon in E. coli encodes all of the proteins necessary for the…

A: An operon is a gene unit of bacterial system whose transcription is positively and negatively…

Q: Question 2 : With respect to the E.coli Lac operon, the lac repressor is: A. DNA B. RNA C. Protein…

A: DNA

Q: Do you expect operons to occur extensively in Eukaryotes? Yes or no and explain.

A: Operons (clusters of co-regulated genes with related functions) are a well-known feature of…

Q: Explain how the following conditions will affect the regulation of the operon. Low cAMP levels; E.…

A: Operon is a sequence of DNA that consists of a set of genes which are involved in a particular…

Q: 1) The UR operon which is composed of sequences A, B, C, and D (which may or may not be genes of…

A: An operon may be considered as a group of certain genes which function together so as to regulate…

Q: Discuss the concept of an operon and the roles of the various components in the E. coli lac operon.

A: Escherichia coli is referred to as a gram-negative, rod-shaped, facultative anaerobic, and coliform…

Q: Think about components/interactions of lac operon during conditions of: - glucose, + lactose…

A: In the presence of easily metabolisable sugars like glucose, the bacteria first utilizes the simple…

Q: Defend or attack this statement: “All eukaryotic promoters have TATA boxes.”

A: Promoter is defined as DNA region where initiation of gene transcription takes place. They regulate…

Q: True or false: The lac operon is regulated by the binding of an enhancer to sequences just upstream…

A: The lac operon is associated with the transport and metabolism of lactose in E.coli specially. The…

Q: A. Which operons would be functional under these conditions? lac and trp B. What repressors would be…

A: A. Which operons would be functional under these conditions? Answer - lac and trp operon.   B. What…

Q: (Theme 5) You are studying the role of a gene called stop. When expressed, stop appears to inhibit…

A: If we consider that the stop gene encodes a small RNA, it might function through a process known as…

Q: List and describe four mechanisms used during eukaryotic regulation of gene expression that are NOT…

A: Eukaryotes means those organisms which has true nucleus(true nuclear envelope)while prokaryotes have…

Q: Suppose that E. coli sustains a mutation in its gene for the lac operon repressor making the…

A: When lactose is not present in the medium operon does not transcribe because of the presence of lac…

Q: When referring to attenuation in the regulation of the trp operon it would be safe to say that, when…

A: Attenuation is a regulatory mechanism that is employed in bacterial operons to guarantee that…

Q: Assuming that the level of glucose is low, a mutation in the repressor associated with the lac…

A: The lac operon which is also known as lactose operon is a set of genes that are specific for uptake…

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.