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The lac operon is turned off and on by repressors.
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∙ 8y ago
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∙ 11y agoRepressors
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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.
A lac repressor turns off the lac genes by binding to?
When the lac repressor binds to the O region, RNA polymerase is prevented from beginning the process of transcription. In effect, the binding of the repressor protein turns the operon "off" by preventing the transcription of its genes. (Prentice Hall Biology Book .....Chapter 12 page 310)
The lac operon is shut off when what is absent?
Lactose is absent
When does the induction of the lac operon occur?
The lac operon is most active when glucose levels are low and lactose is present.
The lac operon enables a bacterium to build the proteins needed for lactose metabolism only when?
Lactose is present, otherwise the lac operon is not needed and is shut off.
What turns the lac operon off and off?
Repressors
Why lac operon the gene expression is switch off?
explain the regulation of gene expression in lac operon.
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.
A lac repressor turns off the lac genes by binding to?
When the lac repressor binds to the O region, RNA polymerase is prevented from beginning the process of transcription. In effect, the binding of the repressor protein turns the operon "off" by preventing the transcription of its genes. (Prentice Hall Biology Book .....Chapter 12 page 310)
The lac operon is shut off when what is absent?
Lactose is absent
When does the induction of the lac operon occur?
The lac operon is most active when glucose levels are low and lactose is present.
The lac operon enables a bacterium to build the proteins needed for lactose metabolism only when?
Lactose is present, otherwise the lac operon is not needed and is shut off.
The operon that controls the metabolism of lactose is called the what?
its an operon required for the transport and metabolism of lactose.
When is lac operon most active?
The lac operon is most active when glucose levels are low and lactose is present.
A lac repressor turns ff the lac genes by binding to?
A lac repressor turns off the lac genes by binding to the operator
Is the lac operon found in prokaryotes or eukaryotes?
The lac operon is found in enteric bacteria, predominantly Escherichia coli, therefor it is found in prokaryotes.
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.
