In the lactose operon of E. coli, the CRP-cAMP complex is a(n) _____ of transcription. ...
In the lactose operon of E. coli, the CRP-cAMP complex is a(n)
_____ of transcription.
A. positive regulator
B. enhancer
C. silencer
D. negative regulator
Homework Answers
ANSWER:
The lac operon is an operon required for the transport and metabolism of lactose in Escherichia coli and many other enteric bacteria.
In the lactose operon of E. coli, the CRP-cAMP complex is a(n) POSITIVE REGULATOR of transcription.
Add Answer to:
In the lactose operon of E. coli, the CRP-cAMP complex is a(n)
_____ of transcription.
...
The gene machine program shows you what happens when lactose is present in E. coli, and...
The gene machine program shows you what happens when lactose is present in E. coli, and how the lac operon is under negative control. However, the lac operon is also under positive control from a protein called CRP, eAMP Receptor Protein. The absence of the lac repressor is essential but not sufficient for effective transcription of the lac operon. RNA polymerase also depends on the presence of CRP. Like the lac repressor, which can bind to the DNA and lactose....
In E coli the lac operon will express enzymes for the digestion of (Glucose/Lactose) when it...
In E coli the lac operon will express enzymes for the digestion of (Glucose/Lactose) when it is present, but if both the sugar mentioned before and (Glucose/ Lactose) are present the lac operon is repressed, resulting in the (Glucose/ Lactose) being used first. If there are high levels of cAMP, this means (Glucose/Lactose) levels are low, this results in a (Represser/Promoter) being activated and (Decreasing/Increasing) transcription of the lac operon.
Question 12 2 pts What is the role of CAMP in regulation of the lactose operon?...
Question 12 2 pts What is the role of CAMP in regulation of the lactose operon? CAMP is a repressor of the lactose operon and turns off gene expression of the lactose operon CAMP is an activator and prevents the repressor protein from binding to the operator region of the operon which allows for the lactose operon to be turned "on". 5 CAMP is an inducer of the lactose operon and also an activator since it prevents the repressor protein...
The inducer of the lactose operon in E. coli is CAP. cAMP. allolactose. glucose. galactos Codons...
The inducer of the lactose operon in E. coli is CAP. cAMP. allolactose. glucose. galactos Codons refer to triplet base sequences in the mRNA. nontemplate strand of DNA. template strand of DNA. tRNA. rRNA.
Consider an E. coli strain carrying a mutation in crp (encoding the catabolite activator protein) that...
Consider an E. coli strain carrying a mutation in crp (encoding the catabolite activator protein) that prevents CAP from binding CAMP. Predict whether the repressor and the activator is active (able to bind to DNA) or inactive (unable to bind to DNA), and the level of transcription in the following scenarios. Options for transcription levels include high, medium, leaky and off. a. When lactose is present but glucose is not, the repressor is and the activator is leading to levels...
1) Which of the following conditions is most likely to cause the lactose operon to be...
1) Which of the following conditions is most likely to cause the lactose operon to be transcribed? A) There is more glucose in the cell than lactose. B) There is glucose but no lactose in the cell. C) The cyclic AMP and lactose levels are both high within the cell. D) The CAMP level is high and the lactose level is low. 2) How does the transcription of structural genes in an inducible operon occur? A) It occurs continuously in...
You have systematically mutagenized the lac operon in E. coli to produce a mutation that disrupts...
You have systematically mutagenized the lac operon in E. coli to produce a mutation that disrupts the function of each of the following elements: a. the promoter for LacI (P(I)) b. the LacI gene c. CRP binding site d. the promoter for the lac operon (P(lac)) e. the operator sequence f. a mutation in lacZ that disrupts the coding region but does not disrupt transcription g. a mutation in lacZ that blocks transcription For each of the above mutations, what...
Molecular Biology Help! In positive regulation, a(n) ______________ activates a promoter. activator repressor enhancer regulon none...
Molecular Biology Help! In positive regulation, a(n) ______________ activates a promoter. activator repressor enhancer regulon none of the above In negative regulation, a(n) _____________ turns off the transcription of one or more genes. activator repressor enhancer regulon none of the above The _______ activator protein regulates the araBAD operon. allolactose cAMP-CRP AraC enhancer none of the above Three _____ protein binding sites increase rrn transcription. promoter Fis AraC cAMP-CRP none of the above
help pleaseee In the lac operon, positive control occurs through the presence of the CAMP-CAP complex....
help pleaseee
In the lac operon, positive control occurs through the presence of the CAMP-CAP complex. This complex is not available in the presence of glucose. this would mean that: When lactose is present, the lac operon will be activated only if glucose is absent When lactose is absent, the lac operon will be activated only if glucose is also present When lactose is present, the lac operon will not be activated regardless of glucose presence When lactose is present,...
Which of the following situations will give the highest level of lac operon transcription in E....
Which of the following situations will give the highest level of lac operon transcription in E. coli? **this was my question from my professor there WAS NO additional information given to me. I assume the answer is no glucose and positive for lactose. I think the answer is B; i just wanted to check. A. no glucose no lactose B. no glucose plus lactose C. glucose no lactose D.All conditions will result in the same level of transciption Please explain...
The gene machine program shows you what happens when lactose is present in E. coli, and how the lac operon is under negative control. However, the lac operon is also under positive control from a protein called CRP, eAMP Receptor Protein. The absence of the lac repressor is essential but not sufficient for effective transcription of the lac operon. RNA polymerase also depends on the presence of CRP. Like the lac repressor, which can bind to the DNA and lactose....
Question 12 2 pts What is the role of CAMP in regulation of the lactose operon? CAMP is a repressor of the lactose operon and turns off gene expression of the lactose operon CAMP is an activator and prevents the repressor protein from binding to the operator region of the operon which allows for the lactose operon to be turned "on". 5 CAMP is an inducer of the lactose operon and also an activator since it prevents the repressor protein...
Consider an E. coli strain carrying a mutation in crp (encoding the catabolite activator protein) that prevents CAP from binding CAMP. Predict whether the repressor and the activator is active (able to bind to DNA) or inactive (unable to bind to DNA), and the level of transcription in the following scenarios. Options for transcription levels include high, medium, leaky and off. a. When lactose is present but glucose is not, the repressor is and the activator is leading to levels...
1) Which of the following conditions is most likely to cause the lactose operon to be transcribed? A) There is more glucose in the cell than lactose. B) There is glucose but no lactose in the cell. C) The cyclic AMP and lactose levels are both high within the cell. D) The CAMP level is high and the lactose level is low. 2) How does the transcription of structural genes in an inducible operon occur? A) It occurs continuously in...
help pleaseee
In the lac operon, positive control occurs through the presence of the CAMP-CAP complex. This complex is not available in the presence of glucose. this would mean that: When lactose is present, the lac operon will be activated only if glucose is absent When lactose is absent, the lac operon will be activated only if glucose is also present When lactose is present, the lac operon will not be activated regardless of glucose presence When lactose is present,...
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