High levels of glucose in the environment result in low levels of transcription of the lac operon. The reason for this isO glucose binds to the Lac Repressor to cause it to bind to the operator site (lac O)glucose lowers the levels of CAMP, which is necessary to activate the CAP proteinO giucose raises the levels of CAMP, which binds to the CAP protein to cause transcription repressionO glucose prevents lactose from binding to the Lac RepressorO glucose lowers the levels of the CAP protein, which is necessary to stimulate transcription of the lac operon

Introduction:- The lac operon, short for lactose operon is a series of three genes in bacteria that…

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vels of glucose in the environment result in

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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Nutrition and diet

We are involved in several daily activities. These actions need a significant quantity of energy. The food we eat provides this energy. Food is necessary for development, repair, and other living activities since it supplies energy. All of these are part of the living practice known as nutrition. Nutrition is the study of nutrients in food, how the body uses them, and the relationship between diet, health, and disease. Nutritionists employ concepts from molecular biology, biochemistry, and genetics to understand how nutrients affect the human body. Nutrition also looks at how people can use their diet to reduce their risk of disease, as well as what happens when they ingest too much or too little of a nutrient and how allergies emerge.

Question

High levels of glucose in the environment result in low levels of transcription of the lac operon. The reason for this is
O glucose binds to the Lac Repressor to cause it to bind to the operator site (lac O)
glucose lowers the levels of CAMP, which is necessary to activate the CAP protein
O giucose raises the levels of CAMP, which binds to the CAP protein to cause transcription repression
O glucose prevents lactose from binding to the Lac Repressor
O glucose lowers the levels of the CAP protein, which is necessary to stimulate transcription of the lac operon

Expert Solution

Step 1

Introduction:-

The lac operon, short for lactose operon is a series of three genes in bacteria that produce the necessary enzymes to obtain energy from lactose.
Typically, glucose is the sugar of choice for bacterial organisms,but when this supply runs low, the lac operon allows the organisms to survive on lactose.

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High levels of glucose in the environment result in low levels of transcription of the lac operon. The reason for this is glucose raises the levels of CAMP, which binds to the CAP protein to cause transcription repression glucose prevents lactose from binding to the Lac Repressor glucose lowers the levels of CAMP, which is necessary to activate the CAP protein glucose binds to the Lac Repressor to cause it to bind to the operator site (lac O) glucose lowers the levels of the CAP protein, which is necessary to stimulate transcription of the lac operon
Match the nutrient environment with the status of the transcription factors that regulate the lac operon in E. coli. Lacl bound to lactose and CAP is bound V[Choose ] Low lactose, low glucose High lactose, high glucose High lactose, low glucose Low lactose, high glucose CAMP and the CAP-O Lacl bound to the LacO and CAP bound CAMP and the CAP-O Lacl bound to lactose and CAP unbound [ Choose ] by CAMP, not on the CAP-O Lacl bound to the LacO and CAP unbound [ Choose ] by CAMP, not on the CAP-O
The molecules indicated below can be used experimentally due to their roles in relation to the expression of the lac operon. Drag the listed molecules to their corresponding bin. Reset Help ONPG IPTG X-Gal allolactose Dragable beta-galactosidase cleaves this molecule to form a visible yellow product. beta-galactosidase cleaves this molecule which then dimerizes to form a visible blue product. This molecule induces the transcription of the lac operon by inactivating the lac repressor.
For the lac operon, when glucose is absent and lactose is present ___________ None of the options cAMP-CAP is bound to the operator and the repressor is not bound to the promoter cAMP-CAP is not bound to the promoter and the repressor is bound to the operator cAMP-CAP is bound to the promoter and the repressor is not bound to the operator
In the presence of lactose and the presence of glucose the lac operon is V [ Select ] Lacl is [ Select ] t. expressed at basal levels strongly expressed to the CAP binding site. not expressed
Which of the following conditions is most likely to result in an increase rate of transcription of the lac operon? when lactose is present AND the repressor is permanently attached to the operator when lactose is present and there is high levels of glucose when lactose is absent and there are low levels of glucose when lactose is present and there are low levels of glucose
In the absence of lactose and the presence of glucose the lac operon is strongly expressed Lacl is not bound bound to the CAP binding site. to the operator and CAP is
Given the Table below concerning the lac operon, match the letter with what would be occurring for each scenario. Repressor is bound to the operator, cAMP complex is bound and transcription is prevented. Allolactose is bound to the repressor, cAMP complex is bound, and transcription is prevalent. Allolactose is bound to the repressor, cAMP complex is not assembled, and transcription is slow Repressor is bound to the operator, cAMP complex is not assembled, and transcription is prevented.
Match each description with the appropriate label (allo)Lactose binds to the lac repressor, causing it to release from the promoter CAP binds CAMP to stimulate transcripti of the lac operon ✓ [Choose ] positive control of an inducible gene negative control of an inducible gene [Choose]
Mutations in the genes of the lac operon might affect the regulation of β-galactosidase synthesis. For each mutation listed below, indicating whether β-galactosidase would be regulated normally, always ON or always OFF. Mutation in operator site prevents repressor binding Mutation in lacIgene prevents repressor from binding operator Mutation in lacIgene prevents repressor from binding allolactose Nonsense mutation in lacZgenere
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