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How many start codons and stop codons will be present on the RNA produced when the pmo operon is transcribed?
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What would happen to the lac operon if a bacterium were growing in the presence of both glucose and lactose?
The regulatory portion of the operon is the only portion that would be transcribed.
What is a set of prokaryotic genes that are regulated and transcribed as a unit?
They are operons. The genes contained in an operon are expressed together or not at all.
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 is the difference between an operon and a regulon?
1. For operon genes are located near each other. For regulon genes are present distinct site of DNA. 2. Operon may have specific operator for all genes. For regulon each gene have different operator.
The obvious advantage of the lactose operon system is that?
lactose metabolizing enzymes need not be made when lactose is not present.
What happen to lac repressor in E. coli when lactose is present?
E. coli binds with lactose which changes its conformation so that it no longer binds to DNA. This allows the lactose operon to be transcribed.
When is the lactose operon likely to be transcribed?
whenever it's in that transcribing kind of mood
What would happen to the lac operon if a bacterium were growing in the presence of both glucose and lactose?
The regulatory portion of the operon is the only portion that would be transcribed.
What is a set of prokaryotic genes that are regulated and transcribed as a unit?
They are operons. The genes contained in an operon are expressed together or not at all.
When does the induction of the lac operon occur?
The lac operon is most active when glucose levels are low and lactose is present.
When is lac operon most active?
The lac operon is most active when glucose levels are low and lactose is present.
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 features of the lactose operon?
---|CRP|-------------| O |---| Z | Y | A |---CRP: Binding site for activatorO: Operator, binding site for repressorCoding sequences:Z: b-galactosidaseY: lactose permeaseA: thiogalactoside transacetlyase
What does tryptophan bind to when it is present in e. coli?
trp operon
In Figure 84 which model of the lac operon correctly shows RNA polymerase lactose and repressor protein when the structural genes are being transcribed?
regulatory promoter oerator
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.
Transcription of the structural genes in an inducible operon?
starts when the pathway's substrate is present
