The lac operon is a negative inducible system and allolactose will bind to the regulator protein when present. Which of the following is true? the free repressor (not bound by the inducer) cannot bind to the operator. allolactose must bind to the lac repressor protein, preventing it from binding to DNA, in order for the structural genes to be transcribed. allolactose must be absent in order for the structural genes to be transcribed. the presence of allolactose prevents transcription of the the lacl gene, which encodes the lac repressor.

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: Imagine that you are studying the promoters of genes in E. coli. You notice that genes that are…

A: Lac operon in E.coli. is negatively inducible operon. It has 3 structural genes - LacZ - encodes…

Q: The only way that information is extracted out of DNA is through the transcription of MRNAS that…

A: According to our guideline we can answer only the first question. So upload the second question…

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: If a bacteria cell, that has the lac operon, is metabolizing lactose glucose is absent and…

A: We are answering first question. Pls repost for second question.

Q: A new operon called Terperon is discovered and is not normally transcribed. It is stimulated by the…

A: Operon is the cluster of regulatory, promoter, operator and structural genes

Q: Which of the following statements is/are TRUE for the promoters? The Pribnow box and TATA box are…

A: A promoter is a short region of DNA upstream of  gene where RNA Polymerase recognizes the start site…

Q: Regulation of the E. coli trp operon by attenuation requires the trp repressor protein. prevents…

A: An operon is a function unit of DNA containing a set of genes including structural gene, a…

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: A bacterial cell is mutated and cannot create the repressor protein associated with the Lac operon.…

A: Lac operon is associated with uptake and metabolism of lactose. It has several components such as a…

Q: In E. coli, when glucose is present, galactose is used to make a component of the bacterial cell…

A: In the absence of glucose the operon is not described or transcribed at very low levels. When…

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: 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: that

A: The trp operon found in E coli bacteria . It's a group of genes that encode biosynthetic enzymes.…

Q: The role of allolactose in the lac operon

A: Lac Operon:This is a classic example of a gene regulation system found in E. coli.The key…

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: Laz Z Lac Z Lạc Y Lac Y Genotype -lactose +lactose -lactose +lactose a. I+P+O+Z-Y+/F I+P+O^S Z+ Y-…

A: A set of genes present in E.coli. that regulates the uptake of lactose from the surrounding…

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: 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: As diagrammed below, some amino acid biosynthetic operons have stem loop structures in the mRNA.…

A: Option A is incorrect as without the formation of heparin the process of translation can not be…

Q: Which of the following condition(s) is optimal for expression of the lac operon? I. low glucose…

A: The lac operon is a cluster of genes in bacteria, including the genes for lactose utilization. It…

Q: v constructed gene. What will

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

Q: Explore the differences between positive inducible, positive repressible, negative inducible, and…

A: Positive Inducible Regulation:- In positive inducible regulation, the binding of the regulatory…

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: Under what conditions would you expect to see high levels of expression of the structural genes in…

A: Please find your answer in step2:

Q: The lac operon has which of the following characteristics? O 1) usually requires an activator…

A: In Eukaryotes all genes are separate and produce individual mRNAs on transcription. However, in…

Q: When would the lac operon in E. coli be repressed, and why?

A: Operon includes a group of structural genes and regulatory sequences.

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: What is the function of cAMP in regulation of the lac operon? Group of answer choices it activates a…

A: The lac operon seems to be an inducible operon that uses lactose as a source of energy and is active…

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.