Homework Answers
operator is a binding site for the repressor.
it is a regulatory sequence. this results in prevention of RNA polymerase from transcribing genes. this binding blocks the binding of RNA polymearse at the promoter region.
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QUESTION 5 The operator a encodes the repressor protein b. encodes an enzyme C. is a...
here is the diagram ecause there is no repressor protein attached to the operator, what enzyme...
here is the diagram
ecause there is no repressor protein attached to the operator, what enzyme con attach to the promoter and move past the operator to transcribe the structural genes? Color this enzyme pink "color the repressor gene purple and the repressor protein it codes for red. Examine the shape of the repressor protein. 45) Is it an active or inactiverepressor protein? The diagram below shows the trp operon when turned off." Repressor gene Promoter Operator Structural genes DNA...
Allolactose acts as a signal molecule that binds to the LacI protein (repressor) and prevents it...
Allolactose acts as a signal molecule that binds to the LacI protein (repressor) and prevents it from binding to the Operator on the lac operon. But if the repressor is on the operator, no B-glactosidase can be made which means no allolactose can be made in the first place. So how is the repressor removed so allolactose can be made to stop the repressor from binding?
Review Each temperate (or lysogenic) bacteriophage (e.g., lambda, 434, P22) encodes its own repressor protein. The...
Review Each temperate (or lysogenic) bacteriophage (e.g., lambda, 434, P22) encodes its own repressor protein. The repressor binds to six binding sites within the phage genome. These sites can also be bound by a second transcriptional repressor encoded by the phage, called Cro. The pattern of binding of repressor and Cro to these sites determines whether the phage grows lytically or lysogenicaly. Launch the molecular model of the temperate bacteriophage repressor to explore its structure. Then, answer the questions. Launch...
Match the protein listed below with the gene that encodes it or with the DNA sequence...
Match the protein listed below with the gene that encodes it or with the DNA sequence within the lac operon where it binds: lac repressor (encoded by...) [Choose] lac repressor (where it binds...) [Choose ] B-galactosidase [Choose] Lactose permease [Choose] Galactoside transacetylase [Choose] CAP [Choose] lacz lacy lacl Operator CAP site lacA
The LacI protein is released from the operator sequence upon binding of IPTG, allowing the transcription...
The LacI protein is released from the operator sequence upon binding of IPTG, allowing the transcription of all the genes within the lac operon. In this case, LacI is called a transcriptional _______. In comparison, CRP binds to the CRP binding site sequence upon binding of cAMP, enhancing transcription. CRP is called a transcriptional _______. Select one: a. activator ;;;;; activator b. activator ;;;;; repressor c. repressor ;;;;; activator d. repressor ;;;;; repressor e. None of these
The tryptophan operator... A is an allosteric protein. binds to the tryptophan repressor when the repressor...
The tryptophan operator... A is an allosteric protein. binds to the tryptophan repressor when the repressor is bound to tryptophan 0 is required for production of the mRNA encoded by the tryptophan operon 1. is important for the production of the tryptophan repressor.
The lac repressor active site The active site of the lac repressor protein is composed of...
The lac repressor active site The active site of the lac repressor protein is composed of OK Multiple Choice Inces O the protein domain that binds to allolactose. the protein domain that binds to DNA the protein domain that binds to other lac repressors O a glucose binding domain < Prev
answer the following questions about lac operon: a) if the lack repressor protein is bound to...
answer the following questions about lac operon: a) if the lack repressor protein is bound to the operator, are the E.coli metabolized lactose or not? explain your reasoning. b) If the lack repressor protein is bound to the operator and cellular glucose levels are low, is cAMP-CAP complex bound adjacent to the promotor, or not? explain your reasoning. c) if the lack repressor protein is bound to the operator and cAMP - CAP is bound to the CAP site, are...
1. If tryptophan interacts with a repressor protein (which it does in real life) and the...
1. If tryptophan interacts with a repressor protein (which it does in real life) and the trp operon is anabolic (which it is) a. What would happen to tryptophan production levels and energy expenditure in a mutant bacterial cell that had a repressor protein that was incapable of binding to tryptophan (but was normal in every other way) b. What would happen to tryptophan production levels and energy expenditure in a mutant bacterial cell that had a repressor protein that...
When lactose is absent: 1. Is the repressor protein bound to the operator? 2. Is gene...
When lactose is absent: 1. Is the repressor protein bound to the operator? 2. Is gene transcription regulated on or off? When lactose is present: 1. Is the repressor protein bound to the operator? 2. Is gene transcription regulated on or off?
here is the diagram
ecause there is no repressor protein attached to the operator, what enzyme con attach to the promoter and move past the operator to transcribe the structural genes? Color this enzyme pink "color the repressor gene purple and the repressor protein it codes for red. Examine the shape of the repressor protein. 45) Is it an active or inactiverepressor protein? The diagram below shows the trp operon when turned off." Repressor gene Promoter Operator Structural genes DNA...
Review Each temperate (or lysogenic) bacteriophage (e.g., lambda, 434, P22) encodes its own repressor protein. The repressor binds to six binding sites within the phage genome. These sites can also be bound by a second transcriptional repressor encoded by the phage, called Cro. The pattern of binding of repressor and Cro to these sites determines whether the phage grows lytically or lysogenicaly. Launch the molecular model of the temperate bacteriophage repressor to explore its structure. Then, answer the questions. Launch...
Match the protein listed below with the gene that encodes it or with the DNA sequence within the lac operon where it binds: lac repressor (encoded by...) [Choose] lac repressor (where it binds...) [Choose ] B-galactosidase [Choose] Lactose permease [Choose] Galactoside transacetylase [Choose] CAP [Choose] lacz lacy lacl Operator CAP site lacA
The tryptophan operator... A is an allosteric protein. binds to the tryptophan repressor when the repressor is bound to tryptophan 0 is required for production of the mRNA encoded by the tryptophan operon 1. is important for the production of the tryptophan repressor.
The lac repressor active site The active site of the lac repressor protein is composed of OK Multiple Choice Inces O the protein domain that binds to allolactose. the protein domain that binds to DNA the protein domain that binds to other lac repressors O a glucose binding domain < Prev
When lactose is absent: 1. Is the repressor protein bound to the operator? 2. Is gene transcription regulated on or off? When lactose is present: 1. Is the repressor protein bound to the operator? 2. Is gene transcription regulated on or off?
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