5. Use the table below to describe under what conditions the lac operator is turned on and off. Is the lac operon ON/OFF? Condition: No lactose HIGH lactose & HIGH glucose (i.e., high ATP, low cAMP) HIGH lactose & LOW glucose (i.e. low ATP, high CAMP) What is regulating the lac operon to be ON or OFF?

5. Use the table below to describe under what conditions the lac operator is turned on and off. Is the lac operon ON/OFF? Condition: No lactose HIGH lactose & HIGH glucose (i.e., high ATP, low cAMP) HIGH lactose & LOW glucose (i.e. low ATP, high CAMP) What is regulating the lac operon to be ON or OFF?

Name: 5. Use the table below to describe under what conditions the lac oper
Uploaded: 2024-03-20T06:42:41.000Z
Channel: Bartleby
Description: 5. Use the table below to describe under what conditions the lac operator is turned on and off.Is the lac operonON/OFF?Condition:No lactoseHIGH lactose & HIGH glucose (i.e.,high ATP, low cAMP)HIGH lactose & LOW glucose (i.e. lowATP, high CAMP)What i

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter16: Regulation Of Gene Expression

Section16.1: Regulation Of Gene Expression In Prokaryotes

Problem 2SB: Answer the equivalent question for the trp operon: how would a mutation that prevents the Trp...

See similar textbooks

Similar questions

1. What is the default state of the lac operon? a. LacI repressor is sitting on the operator sequence and blocks RNAP from transcribing lacZYA. b. LacI repressor is not in a correct shape to bind to the operator sequence. c. LacI repressor is not produced in the absence of lactose. d. Allolactose is sitting on the operator sequence and blocks RNAP from transcribing lacZYA.
4. What are the effects of the following conditions on Lac operon of bacteria?A)Glucose is absent and lactose is presentB)Glucose is present and lactose is presentC) Glucose is present and lactose is absent
1) Assume you have an operon that is repressible. In this case, the rate of synthesis of repressor protein must depend on the level of a) co-repressor b) inducer c) both d) neither
1) A. What is the difference between a repressible vs, an inducible operon? B. Using diagrams and words, describe how the Lac Operon is regulated by different levels of lactose and glucose. Be sure to show what’s happening at the molecular level, including the roles of lactose, glucose the repressor protein, cAMP and CAP.
2. What does an operon typically consist of? a. an operator, a promoter, and a cluster of genes b. a cluster of genes c. a promoter and a cluster of genes d. an operator and a cluster of genes e. a promoter and an operator
3. How might the regulation of the lac operon change if a point mutation occurred that blocks the ability of the repressor protein (LacI) to bind lactose?
1. How does induction control enzyme synthesis using lactose operon? 2. Describe how level of a key metabolite [tryptophane] controls the gene function using tryptophane operon
1. In DNA amplification, using the Taq polymerase, what is the maximum number of amplification cycles? a. 30 b. 20 c. 60 d. 10 2. In the case of trp operon, for transcription to fully occur, which of the following conditions must be met? a. Environmental tryptophan level must be low. b. Environmental tryptophan must be absent. c. Environmental tryptophan level must be abundant. d. Both a and b are correct.
4) Suppose you have an E. coli in which the gene that codes for the lac repressor protein has been mutated in such a way that the protein produced can bind to both lactose and DNA (at its specific binding site in the lac operon promoter) simultaneously. What effect, if any, would this have on regulation of expression of the lac operon? Briefly (1 sentence) explain why you would predict the effect or lack of effect this mutation would have.
1. A)Explain the mechanism by which the lac operon is sensitive to glucose levels (presence and absence of glucose). B)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?
1. Assuming that the level of glucose is low, a mutation in the repressor associated with the lac operon of E. coli which prevents binding of the repressor to lactose should result in: a. constitutive expression of the lac operon genes b. lack of expression or refuced expression of the lac operon genes under all circumstances c. expression of the genes only when lactose is present d. expression of the genes only when lactose is absent e. lack of expression of the lac operon genes, resulting in an increase in lactose production
1. (a) Lactose levels are high Lac Operon Genes are switched OFF Lac Operon Genes are switched ON Does NOT affect the gene expression (b) Enhancer and activator proteins are working together Gene is switched ON Gene is switched OFF Does NOT affect the gene expression