When lactose is added to growing culture of E. coli, the cells begin to make enzymes necessary for lactose utilization. In contrast, when tryptophan is added to the culture medium, synthesis of the enzymes for tryptophan pathway ceases. Contrast the two systems explaining why they act in reverse directions.

Q: describe the actions of the normal and mutated lac operon in absence of lactose.use picture if…

A: Lac operon is the consists of lac genes that code the enzymes and these enzymes are used to uptake…

Q: Would a mutation that inactivated lac repressor and prevented it from binding to the lac operator…

A: The negative regulation of the lac operon is done by a repressor, which is a product of the lacI…

Q: For the Escherichia coli lactose operon genotypes listed, + indicates a functional component, -…

A: Permit me to elaborate on these lac operon strains' genotypes and phenotypes:  1. lacZ+ lacZ+ lacY+…

Q: IPTG can be used in the laboratory as a synthetic inducer of the lac operon, instead of lactose.…

A: Lactose operon is an example of inducible operon in which the expression of downstream genes will be…

Q: Imagine this scenario: In E.coli the Operon X encodes for Proteins Y, X and Z. Proteins Y, X and Z…

A: Introduction  The lac operon is a group of genes in bacteria that are regulated as a unit and are…

Q: Considering the Lac operon in E. coli, and chose what the expression of Lac Y would be in:  I) E.…

A: Lac l is the gene  which synthesizes repressor.Actually repressor is a protein that binds to the…

Q: Describe the binding of RNA polymerase, repressors, andactivators to the lac operon when both…

A: The lac operon is a group of genes which has a single promoter and the genes in this operon codes…

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: . Partial diploid forms of E. coli were created, each of which contained a com- plete lactose operon…

A: Lac operon is composed of lacI, P, lacO, lacZ, lacY and lacA genes. Regulatory genes are lacI, P and…

Q: Why trp operon has a higher level of expression than live operon in bacteria grown on nutrient-poor…

A: Operon is a genetic regulatory system that is found in bacteria and viruses. This system controls…

Q: operon

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

Q: A bacterial cell has very low glucose and lactose is present.  Explain how the lac operon will…

A: Lac Operon -- An operon is a functioning unit of genomic DNA which contains a group of genes…

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: lacZ isn't expressed, in the presence and absence of glucose and lactose. What components of the lac…

A: If this cell had alternative carbon sources to use for ATP production, like glucose or some other…

Q: If the levels of both Glucose and Lactose were low in a bacterial cell, describe the state of the…

A: In bacteria and their viruses, an operon is a genetic regulatory structure in which genes coding for…

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: nber that hexose kinase is an enzyme required for hexose metabolism, a process that takes a on sugar…

A: Operon is a regulatory unit in certain bacteria that helps in the regulation of the gene expression…

Q: ac operon.  Drag the listed molecules to their corresponding bin. Reset Help   ONPG IPTG X-Gal…

A: ONPG - beta-galactosidase cleaves this molecule to form a visible yellow product. Explaination:  The…

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: The tryptophan operon is regulated by two methods. Describe in detail the regulation of the operon…

A: Genes are the functional unit of heredity. Operons are a group of genes under a single promoter. The…

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

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

Q: Lac operon experiment,

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

Q: Describe the role of the CRP–cAMP complex in positiveregulation of the lactose operon in E. coli.

A: The E. coli lac operon includes genes involved in lactose metabolism. It is only expressed when…

Nutrient Growth Medium

It is a culture medium or nutrient broth for all kinds of microorganisms to grow properly and create their colony. This matrix provides support to increase the population of microbes through the method of cell proliferation. It is regarded as the food material for those organisms. It is a type of in vitro mechanism, in which the development of life is processed outside the host body. It can be solid, semi-solid, or liquid in nature. Different kinds of cells develop in different types of media.