When iron is scarce, some bacteria can stop synthesis of all enzymes that require iron (Fe3+), such as superoxide dismutase (SOD). Which of the following accurately describes a mechanism for this regulation? Mark all that apply. A. Regulation occurs by an inducible operon B. When absent, the lack of iron causes the repressor to deactivate and block the promoter region for these genes C. Regulation occurs by a repressible operon D. When present, iron binds and activates the repressor protein

Q: IPTG (isopropylthiogalactoside) is commonly used to induce protein expression in Lac…

A: IPTG, also known as isopropyl d-1-thiogalactopyranoside, is a molecular biology tool. This substance…

Q: If an abnormal repressor protein could still bind allolactose but the binding of allolactose did not…

A: The Lac operon contains genes responsible for the transportation and breakdown of lactose. These…

Q: If an abnormal repressor protein could still bind allolactose but the binding of allolactose did not…

A: Operon acts as a single regulated unit having one or more structural genes, promoter gene, a…

Q: Genes in both prokaryotes and eukaryotes are regulated by activators and repressors.a. Compare and…

A: Gene regulation refers to the mechanisms that are responsible for the repression or induction of…

Q: A mutation in the operator region of the trp operon can prevent the trp repressor from binding to…

A: Operons are the functional unit of transcription and regulation of genes in almost all bacteria and…

Q: Operons can not be:   a. Negatively regulated b. Positively regulated c. Constitutive d. Inducible…

A: The workhorses of a body are proteins. All or every function of the body are carried out by the…

Q: If lactose isn't present in the environment of an E. coli, what is the state of the lac operon? O a.…

A: The lactose operon (also known as the lac operon) is a group of genes present in E. coli and other…

Q: Propose a final method of gene regulation of the Up Lateoperon using an updated drawn figure of the…

A: An operon is a part of the DNA where a few genes are clustered together that are transcribed…

Q: E. coli are grown on a medium containing lactose. Once glucose is added to the medium, the bacteria…

A: In bacterial cells, the regulation of gene expression plays a crucial role in adapting to changing…

Q: Operon X produces three enzymes that convert Compound A to Compound B. The R gene makes the…

A: Gene expression is given on the basis of RNA. It is a process through which there is turning on of…

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: 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: Geneticists isolated six trains of E. coli (strains 1-6) whose lac operons had one of the following…

A: Lac operon It is an operon that is needed for the movement and metabolism of lactose in E. coli.

Q: In the lac operon, how would gene expression be affected if each one of the following segments was…

A: The lac operon is basically a group of genes with a single promoter whose genes encode proteins that…

Q: You identify a mutant that affects lac operon expression. You decide to investigate this mutant…

A: The concept of transcriptional regulation refers to the mechanisms by which cells control the…

Q: 5f. Complete the diagrams below to reflect the proteins and any relevant cofactors (e.g. -…

A: The lac operon is an operon, or cluster of genes with one promoter (transcribed as one mRNA). The…

Q: A mutation that inactivates transcription and translation from the regulatory gene of an inducible…

A: An operon is a functional unit of genomic DNA that comprises a collection of genes that are all…

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: 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: An E. coli cell acquires a mutation in the gene that encodes CAP. The mutation affects the…

A: The transcription is a process through which information in the DNA molecule is transcribed into…

Q: ptoph had a mutation on the repressor, not allowing it to bind with tryptophan. The repressor is…

A: Operons are proteins encoded together as a block that performs specific functions and are involved…

Q: If CAP is bound to the Promoter of the Lac Operon and the repressor protein is not bound to the…

A: Operon is the prokaryotic gene regulatory system that controls the expression of polycistronic mRNA.…

Q: You identify a new transcriptional regulator that binds a known sequence of DNA. You are able to…

A: Identify a new transcriptional regulator that binds a known sequence of DNA.Observe the behavior of…

Q: Expression of the operon ultimately results in the synthesis of the repressor (Q) and co-repressor…

A: A repressor is a protein that turns off the expression of one or more genes. The repressor protein…

Q: Which statement about the transcription attenuation mechanism is TRUE? 1.In some operons (e.g., the…

A: Transcriptional attenuation is a regulatory mechanism that causes premature termination of…

Q: 5f. Complete the diagrams below to reflect the proteins and any relevant cofactors (e.g. -…

A:

Q: Mutations in bacterial promoters may increase or decrease the rate of gene transcription. Promoter…

A: The -10 site sequence in bacterial promoters is essential for RNA polymerase binding and…

Q: The following diagram show what is required for an active promoter of a gene of interest, where:A1 =…

A: Based on the given diagram, here are the predictions:Chromatin conformation: EuchromatinMethylation…

Q: v constructed gene. What will

A: introduction pGLO is a genetically engineered plasmid which incorporates parts of the arabinose…

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 bacteria, genes that are often used together are controlled by a single promoter. Explain why…

A: Gene regulation refers to the numerous processes that regulate which genes are expressed and the…

Q: One 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: You identify a mutant that affects lac operon expression. You decide to investigate this mutant…

A: Wild-type lac Operon Regulation:The lac operon in E. coli is a cluster of genes involved in lactose…

Q: Consider the following scenario: A bacteria cell is surrounded by lactose, but there is no glucose…

A: Lac operon is an operon model takes place in E coli bacteria . It consists of :- A)Promoter  B )…

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.