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An operon is a group of genes that operate together.
Operon- a functioning unit of genomic DNA containing a cluster of genes under the control of a single regulatory signal or promoter.
Operons are clusters of genes consisting of one operator and promoter. There are a lac operon, which is responsible for metabolism of glucose. And there is also the Trp operon, which is responsible for synthesising tryptophan.
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∙ 8y ago
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∙ 11y agoAn Operon is composed of three things:
1. Promoter: Region of DNA where RNA Polymerase initiates transcription.
2. Operator: Signal for transcription of structural genes
3: Structural Genes: Determine the structures of proteins to distinguish them from an adjoining control region on the DNA.
The Promoter and the Operator combined is the Control Region.
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∙ 14y agoThe parts of an operon are the repressor, promoter, and structural genes.
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∙ 9y agoAn operon is a mechanism that controls gene expression. They are composed of three parts. They are the promoter, operator and gene.
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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.
How is lac operon different from trp operon?
1. in lac operon; gene activity is induced when lactose is present in the medium, whereas in case of trp operon, repression of the gene activity takes place in presence of tryptophan in the medium. 2. lac operon spans about 4-6kb...whereas trp operon spans abut 7kb. 3. lac operon helps in the breakdown of lactose into glucose and galactose, to generate energy( catabolic pathway ) in case of trp operon, it helps in the synthesis of enzymes required for the formation of the amino acid Tryptophan( anabolic pathway ). 4. lac operon is an example of positive regulation ; and trp operon is an example of negative regulation. Trp operon is also regulated by other mechanism called attenuation while no such even occurs in lac operon . .
The tryptophan operon is a repressible operon that is?
Turned off whenever tryptophan is added to the growth medium
What name is given to a cluster of genes with related functions along with their control sequences in bacteria?
An inducer is a cluster of genes that codes for proteins with related functions. They do this by disabling repressors, which causes the gene to be expressed.
The operon segment composed of the gene that codes for a protein repressor is called the?
regulator
The operon that controls the metabolism of lactose is called the what?
its an operon required for the transport and metabolism of lactose.
What acts as an on and off switch in an operon?
which part of an operon acts as the on or off switch?
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 are the roles of allolactose in the lac operon and tryptophan in trp operon?
allolactose acts as an inducer
What turns the lac operon on and off?
The lac operon is turned off and on by repressors.
How is lac operon different from trp operon?
1. in lac operon; gene activity is induced when lactose is present in the medium, whereas in case of trp operon, repression of the gene activity takes place in presence of tryptophan in the medium. 2. lac operon spans about 4-6kb...whereas trp operon spans abut 7kb. 3. lac operon helps in the breakdown of lactose into glucose and galactose, to generate energy( catabolic pathway ) in case of trp operon, it helps in the synthesis of enzymes required for the formation of the amino acid Tryptophan( anabolic pathway ). 4. lac operon is an example of positive regulation ; and trp operon is an example of negative regulation. Trp operon is also regulated by other mechanism called attenuation while no such even occurs in lac operon . .
The tryptophan operon is a repressible operon that is?
Turned off whenever tryptophan is added to the growth medium
Is operon proteins?
Operon is not a protein. It is a segment of DNA that has cluster of genes controlled by the elements such as promoter, operator. Lac operon is a classic example where it regulate the utilization of Lactose in the medium.
Why lac operon the gene expression is switch off?
explain the regulation of gene expression in lac operon.
When is lac operon most active?
The lac operon is most active when glucose levels are low and lactose is present.
When a group of gene pairs act together?
A group of genes that is operated together is an Operon.
