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Who was the operon model of the regulation of gene expression in bacteria was proposed by?
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∙ 12y ago
In 1961 Jacob and Monod proposed the operon model of gene regulation
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∙ 12y ago
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What does the operon model attempt explain?
the coordinated control of gene expression in bacteria
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 . .
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.
Why is the lac operon said to be an inducible operon?
Because it is normally inhibited and needs a precursor molecule to release the inhibitory molecule so that the bacteria can metabolize lactose. Induced.
What name is given to a unit of a bacterial chromosome that controls the expression of a specific set of genes?
operon
What is involved in regulating gene expression in prokaryotes but not in eukaryotes?
The regulation of gene expression allows prokaryotic cells, such as bacteria, to better respond to stimuli and to conserve energy and materials
Why lac operon the gene expression is switch off?
explain the regulation of gene expression in lac operon.
What does the operon model attempt explain?
the coordinated control of gene expression in bacteria
Which aspect of lac operon regulation is an example of post-translational control?
allosteric regulation of CAP
The positive control of the lactose operon in bacteria is what?
Catabolite repression is the positive control of the lactose operon in bacteria. Glucose is metabolized initially and when depleted, the lactose.
Who proposed the lac operon concept?
francois Jacob and Jacques monad
Molecules that interact with DNA to alter gene expression are?
operon
The expression of the tryptophan operon is controlled by?
a repressor that is active when it binds to tryptophan
What has the author Matthew L Nilles written?
Matthew L. Nilles has written: 'Regulation of the acrAB operon of Escherichia coli' -- subject(s): Genetics, Multidrug resistance, Escherichia coli, Gene expression, Operons
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.
2 types of operons?
The two types of operons are Inducible and Repressible Operons.
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 . .
