Figure 5 shows the lac operon structure in Escherichia coli.   a) Name structures P, Q and R. b) Name substance S. c) What is the enzyme encoded by gene I. Give its function. d) What will happen if substance S is absent in the medium?

Q: Define an operon.give an example,exaplain an inducible operon?

A: Gene regulation is the mechanism which acts to either induce or repress the gene expression. It…

Q: Attardi et al. (1963) found that lactose operon mRNA synthesis in coli increased with the addition…

A: Both structural and regulatory genes are found in genomic DNA, and both encode products that act as…

Q: What would happen if the operator sequence of the trp operon contained a mutation that prevented the…

A: Trp Operon is an operon that codes for the components for the production of Tryptophan, it consists…

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: Can you explain what exactly operon is? Instead of just copying and pasting from google, can you…

A: DNA  DNA are the inheritable unite which passes from parents to their offsprings. DNA contains genes…

Q: Describe briefly the Trp operon? Why is it considered an example of negative regulation?

A: An operon is a cluster of genes that are transcribed together to give a single messenger RNA (mRNA)…

Q: A bacterial operon consists of _____________________________________________ a single gene that…

A: Bacterial operons are coregulated gene clusters.These genes are turned on or off together.This…

Q: Listed in parts a through g are some mutations that were found in the 5′ UTR of the trp operon of E.…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: Which of the following lac operon genotypes would allow for functional versions of all the…

A: lac operon: - Inducible system - Both positive and negative regulation. - Involved in lactose…

Q: A strain of E. coli has the genotypes shown below at the lac operon, where I = regulator gene, P =…

A: Escherichia coli, is a gram negative bacteria thrives in intestine of all animals which are warm…

Q: Let’s suppose you have isolated a mutant strain of E. coli in which the lac operon is constitutively…

A: E.coli is a gram negative bacterium which thrives in the intestine of mammals. E.coli is beneficial…

Q: Why is the TRP operon considered a repressible operon, while the LAC operon is considered an…

A: Operons are areas of DNA which are composed of cluster of related genes which are controlled by…

Q: What is the function of the seven phenylalanine codons in the 15-amino-acid leader peptide shown…

A: Transcriptional attenuation is a process where an attenuator in the operon causes the formation of…

Q: The genotypes of five merozygote bacteria are shown below. In each set, the enotype of the lac…

A: operon  Operon can be defined as a multiple gene that have only single promoter. All these genes are…

Q: What are the effects of the following conditions on Lac operon of bacteria? Do not forget to mention…

A: Lac Operon helps in the metabolism of lactose in bacteria.

Q: Give the Genetic Proof of the Operon Model ?

A: An operon represents a genetic unit with one or more structural genes and an operator sequence and…

Q: What is the toxin produced by E. coli O157:H7 that was encode by phage as a consequence of lysogenic…

A: E. coli is a gram-negative bacillus and some of its strains have evolved into pathogens. One of…

Q: what is the lac operon ? what happens in terms of the lac operon when lactose is absent from the…

A: The working segment of DNA that codes for proteins is a gene. An operon is a group of genes that are…

Q: The lac operon is strongly transcribed when which of the following sugars are present in the growth…

A: The lac operon is an operon or group of genes with a single promoter (transcribed as a single mRNA).

Q: In E. coli, the trp operon is on by default, while the lac operon is off. Why do you think that this…

A:

Q: The lac operon has 4 genes, I, Z, Y and A. For each scenario, tell me the result of the mutation,…

A: The lac operon is an operon or group of genes with a single promoter. The genes in the operon…

Q: What are the effects of the following conditions on Lac operon of bacteria? Do not forget to mention…

A: lac operon: - inducible operon. - Both positive and negative regulation. - Involved in lactose…

Q: The bacteriophage genome consists of many genes encoding proteins that make up the head, collar,…

A: Bacteriophages are the group I viruses that have double-stranded DNA as their genome.

Q: appropriate to use inducible operons? When is it appropriate to use repressible operons?

A: An operon is a collection of genes with similar functions that is managed by a single shared…

Q: If you make a large deletion in the lac operon to remove the operator region, will the structural…

A: Lac operpon Is an operon or a group of genes  with a single promoter that encode genes for the…

Q: The bacteria E Coli uses the Trp operon to control its production of tryptophan-producing enzymes.…

A: There are five structural genes in the tryptophan Operon along with the operator and the promoter…

Q: Examining Figure 11-21, what effect do you predict trpAmutations will have on trp mRNA expression?

A: This is all about tryptophan operon. This operon consists of group of genes placed together that…

Q: Complete the table below by choosing a term(s) in Column B that associates with the term in Column…

A: The repressor, LacI, binds to the operator sequence and prevents transcription of those genes unless…

Q: Figure 5 shows the lac operon structure in Escherichia Coli What will happen if substance S is…

A: Lac operon contains genes coding for proteins in charge of transporting lactose into the cytosol and…

Q: What advantages are there to having genes arranged in an operon, compared with the arrangement in…

A: The gene is the basic morphological and physiological unit of heredity. DNA is used to make genes.…

Q: What is the role of catabolite activator protein (CAP) in the lactose operon of E. coli? it…

A: Catabolite activator protein is a transcriptional activator. It binds RNA polymerase and activates…

Q: If a wild-type (normal, NOTmutated) E. coli strain is grown in a medium: a. without lactose or…

A: The lac operon or the lactose operon is a mechanism that is involved in the metabolism and transport…

Q: What are the effects of the following conditions on Lac operon of bacteria? Please do not forget to…

A: Lac operon is the inducible system of catabolic degradation of lactose. Lac operon is a combination…

Q: What is lac operon?

A: Lac operon  ,this concept was proposed by Jacob and monod in 1965. Operon is a functioning unit of…

Q: What structural features does the trp operon share with the lac operon?

A: Genes are collections of nucleotides that code for a specific protein. For protein synthesis to…

Q: If glucose levels in the cell are high and lactose is available from the environment, what is the…

A: Bacteria such as E.coli has developed an outstanding system of genes that together regulate the…

Q: What is an operon? Describe the functions of regulators, promoters,and operators.

A: The structure responsible for the regulation of genes in order to synthesize the associated proteins…

Q: Lac operon experiment,

A: In bacteria, the operon is the coordinated unit of genetic expression and is the functioning unit of…

Q: A mutant strain of E. coli has a premature stop mutation in the lacZgene, resulting in a…

A: Operon is a cluster of genes working under the same promoter. Operons are present in prokaryotes.…

Q: What is the difference between positive and negative control? What is the difference between…

A: The cluster of genes that are regulated by a shared operator is called an operon. The multiple genes…

Q: Diagram and define an Operon, including 6 DNA and protein components important to its function.…

A: Operon refers to a group of genes which are under the control of an operator. The major components…

Q: What is the role of catabolite activator protein (CAP) in the lactose operon of E. coli?

A: Lac operon Lac operon is a group of protein that code for enzyme β-galactosidase. The function of…

Q: Positive repressible means the regulatory protein is a(n) ______, and the operon is ______ when the…

A: In the case of the positive repressible operon, the activator protein is found to be bound and…

Q: Attardi et. al (1963) found that lactose operon synthesis in E.coli increased with the addition of…

A: operon, a genetic regulatory system found in bacteria and their viruses that clusters genes coding…

Q: What is gene targeting? Give some examples of gene targeting?

A: Gene is a stretch of DNA in a chromosome  which codes for a functional product either in the form of…

Q: Explain how the lac operon is regulated under the following conditions. Include the following terms…

A: Lactose can be broken down by E. coli bacteria, however, it is not their preferred fuel. They would…

Q: A mutation occurs in the 5′ UTR of the trp operon that reduces the ability of region 2 to pair with…

A: In the absence of tryptophan, the trp operon would be expressed maximum as the trp repressor would…

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

A: The lactose operon or lac operon is an inducible operon system under dual – positive and negative…

Q: What role does an operon play in the synthesis of enzymes in prokaryotes?

A: Prokaryotes are a microscopic single-celled organism that has neither a distinct nucleus with a…

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.