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How does lactose cause the lac operon to turn on?
The lac repressor protein has a binding site for lactose itself.
Is amylase made by the lac operon?
No, the lac operon is involved with the metabolizing lactose. Amylase is a enzyme, thus a protein and made like all proteins. Translation on ribosomes and modification in the ER and modification/shipping in the Golgi. Still, lac operons are bacterial and prokaryote while amylase is a eukaryote enzyme.
Describe how E. coli uses the negative and positive control of the lac operon to economize on RNA and protein synthesis?
if a regulatory protein in its active state turns off the expression of the operon, the operon is said to be negatively regulated by the regulatory protein. if the regulatory protein in its active state truns on the operon, the operon is positively regulated by the regulatory protein. an operon regulated by a repressor is therefore negatively regulated, because the presence of the active repressor prevents transcription of that operon. in contrast, an operon regulated by an activator is positively regulated, because in its active state the activator protein turns on transcription of the operon under its control. the lac operon of E. coli repressor(lac repressor) is synthesized through the activity of the gene lac I, known as regulator gene. the active form of the lac repressor, is a tetramer that contains four copies of the gene I product. in the absence of the inducer, the repressor binds to the lac operator sequence, preventing RNA polymerase from binding to the promoter and transcribing the structural genes. thus the lac operon is negatively regulated associated with the lac operon, there is another site, 16 base pairs upstream of the promoter, which is used for a positive control of the gene expression. this site is called catabolic activator protein site or cyclic AMP(cAMP) protein site or catabolite gene activator(cga) site, because it is utilized for binding of CAP or cga to stimulate gene expression. CAP can bind to this site only when it is bound with cAMP. by binding to it, the CAP-cAMP complex exerts a positive control over the transcription process. it has an effect exactly opposite to that of repressor binding to an operator. yhe effector molecule cAMP determines the effect of CAP on lac operon transcription. presence of glucose inhibits the formation of cAMP and prevents it to bind to CAP
How many genes in the lac operon are found in e. coli?
My answer is 3, I am pretty sure I am right, but I would double check to make sure. I am in ninth grade taking biology at PineTree.
The genetic code for protein synthesis is found within what?
The genetic code for protein synthesis is formed from Dna.
What is the airport code for Lac Brochet Airport?
The airport code for Lac Brochet Airport is XLB.
How does lactose cause the lac operon to turn on?
The lac repressor protein has a binding site for lactose itself.
What is the airport code for Fond-du-Lac Airport?
The airport code for Fond-du-Lac Airport is ZFD.
What is the airport code for Lac La Biche Airport?
The airport code for Lac La Biche Airport is YLB.
What is the airport code for Fond du Lac County Airport?
The airport code for Fond du Lac County Airport is FLD.
What is the abbreviation of lac?
Location Area Code
What is a clue that the lac operon is on?
The lac operon uses a two-part control mechanism to ensure that the cell expends energy producing the enzymes encoded by the lac operon only when necessary. In the presence of lactose, the lac repressor halts production of the enzymes encoded by the lac operon.
When is gene expression blocked in the lac operon system?
The repressor protein blocks the genes from making mRNA.
When the lac repressor protein binds to the?
The other region is the OPERATOR (O) e coli cells contains several copies of a DNA binding proteins known as the lac repressor, which can be bind to the O region your answer: Operator
Is amylase made by the lac operon?
No, the lac operon is involved with the metabolizing lactose. Amylase is a enzyme, thus a protein and made like all proteins. Translation on ribosomes and modification in the ER and modification/shipping in the Golgi. Still, lac operons are bacterial and prokaryote while amylase is a eukaryote enzyme.
What is the code for protein protein?
Gene. Kha'Lil
Describe how E. coli uses the negative and positive control of the lac operon to economize on RNA and protein synthesis?
if a regulatory protein in its active state turns off the expression of the operon, the operon is said to be negatively regulated by the regulatory protein. if the regulatory protein in its active state truns on the operon, the operon is positively regulated by the regulatory protein. an operon regulated by a repressor is therefore negatively regulated, because the presence of the active repressor prevents transcription of that operon. in contrast, an operon regulated by an activator is positively regulated, because in its active state the activator protein turns on transcription of the operon under its control. the lac operon of E. coli repressor(lac repressor) is synthesized through the activity of the gene lac I, known as regulator gene. the active form of the lac repressor, is a tetramer that contains four copies of the gene I product. in the absence of the inducer, the repressor binds to the lac operator sequence, preventing RNA polymerase from binding to the promoter and transcribing the structural genes. thus the lac operon is negatively regulated associated with the lac operon, there is another site, 16 base pairs upstream of the promoter, which is used for a positive control of the gene expression. this site is called catabolic activator protein site or cyclic AMP(cAMP) protein site or catabolite gene activator(cga) site, because it is utilized for binding of CAP or cga to stimulate gene expression. CAP can bind to this site only when it is bound with cAMP. by binding to it, the CAP-cAMP complex exerts a positive control over the transcription process. it has an effect exactly opposite to that of repressor binding to an operator. yhe effector molecule cAMP determines the effect of CAP on lac operon transcription. presence of glucose inhibits the formation of cAMP and prevents it to bind to CAP
