If E. coli bacteria are placed in an environment that contains both glucose and lactose, the regulation of the lac operon will allow which nutrient to be processed first? Both will be processed at the same time. Neither will be processed in this environment. Lactose Glucose Not enough is known about the regulation of the lac operon to know which nutrient will be processed first.

If E. coli bacteria are placed in an environment that contains both glucose and lactose, the regulation of the lac operon will allow which nutrient to be processed first? Both will be processed at the same time. Neither will be processed in this environment. Lactose Glucose Not enough is known about the regulation of the lac operon to know which nutrient will be processed first.

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter14: Gene Regulation

Section: Chapter Questions

Problem 9TYU: A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous...

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A mutation that inactivates the repressor gene of the lac operon results in (a) the continuous transcription of the structural genes (b) no transcription of the structural genes (c) the binding of the repressor to the operator (d) no production of RNA polymerase (e) no difference in the rate of transcription
A bacterial cell is mutated and cannot create the repressor protein associated with the Lac operon. How will this affect the functioning of the Lac operon?
The regulation of the lac operon in E. coli by Catabolite Activator Protein and glucose is an example of what type of regulation? Group of answer choices Positive inducible Positive repressible Negative inducible Negative repressible Constitutive
The lac operon produces enzymes that allow the bacteria E. coli to metabolize lactose, it is in an inducable operon. When lactose is present, will the repressor protein attach or leave the operon? How would this effect the production of lactose producing enzymes?
The lac operon in E. coli bacteria codes for proteins that break down (digest) the disaccharide lactose. Therefore, the lac operon is expressed at its highest levels when there is: A) glucose but no lactose B) lactose and glucose C) lactose but no glucose D) no glucose or lactose
If an operon is controlled by an activator and the substrate of the metabolic pathway then the type of regulation is positive inducible. negative repressible. positive repressible. negative inducible.
Under what conditions would you expect to see high levels of expression of the structural genes in the lac operon? Group of answer choices Lactose is absent and glucose is absent Lactose is absent and glucose is present Lactose is present and glucose is present None of these Lactose is present and glucose is absent
If glucose levels in the cell are high and lactose is available from the environment, what is the status of transcription of the lac operon genes? Explain your answer from both an evolutionary perspective and in terms of negative and positive regulation of the operon?
A mutation at the operator prevents the regulator protein from binding.What effect will this mutation have in the following types of operons? Q. Regulator protein is a repressor of a repressible operon.
If glucose is not available, but lactose is available from the environment, what is the status of transcription of the lac operon genes? Explain your answer from both an evolutionary perspective and in terms of negative and positive regulation of the operon?
In the lac operon, the lacZ gene codes for an enzyme called ____________, which catalyze the breakdown of the sugar __________ into monosaccharides. This enzyme can also hydrolyze the sugar analog ____________, which produces blue pigments following its breakdown. Since the lac operon is not always on the bacterial cells, we add the chemical ________ which prevents the lac depressor from binding to the operators, leading to constitutive expression of the operon.
What would happen if the operator sequence of the lac operon contained a mutation that prevented the repressor protein from binding the operator? (Explain what would happen both in the presence and absence of lactose)