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Q: True are false the lac operon is a repressible operon?
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Is the lac operon the only example of genes regulated by repressor proteins?

False


When does the induction of the lac operon occur?

The lac operon is most active when glucose levels are low and lactose is present.


What turns the lac operon on and off?

The lac operon is turned off and on by repressors.


The operon that controls the metabolism of lactose is called the what?

its an operon required for the transport and metabolism of lactose.


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.


When is lac operon most active?

The lac operon is most active when glucose levels are low and lactose is present.


What regarding control of the lac operon and lactose utilization in bacteria is false?

Bacteria preferentially utilize lactose as a carbon source.


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.


What are the roles of allolactose in the lac operon and tryptophan in trp operon?

allolactose acts as an inducer


What does the promoter of the lac operon sac do?

The promoter region of the lac operon is where the RNA polymerase begins to bind for the transcription of the structural gene Y and Z