What is meant by repressor?
What do you meant by inducer?
Explain both in atleast 4-5 lines
Answers
What is Repressor?
It is a protein which is produced by the regulator gene. The work of this is to bind the operator gene so that the transcription of structural gene stops. Repressor has two binding site first one is operator gene and second is effective molecule which is also known as corepressor.
What is Inducer?
lt is a chemical may be substrate, hormone or some other metabolite which when if it comes in the contact of the repressor then it forms an inducer repressor complex. Amd now this complex cannot bind with the operator gene, which is thus switched on.
Answer:
REPRESSOR
In molecular genetics, a repressor is a DNA- or RNA-binding protein that inhibits the expression of one or more genes by binding to the operator or associated silencers. A DNA-binding repressor blocks the attachment of RNA polymerase to the promoter, thus preventing transcription of the genes into messenger RNA. An RNA-binding repressor binds to the mRNA and prevents translation of the mRNA into protein. This blocking of expression is called repression.
INDUCER
In molecular biology, an inducer is a molecule that regulates gene expression. An inducer functions in two ways; namely:
In molecular biology, an inducer is a molecule that regulates gene expression. An inducer functions in two ways; namely:By disabling repressors. The gene is expressed because an inducer binds to the repressor. The binding of the inducer to the repressor prevents the repressor from binding to the operator. RNA polymerase can then begin to transcribe operon genes.
In molecular biology, an inducer is a molecule that regulates gene expression. An inducer functions in two ways; namely:By disabling repressors. The gene is expressed because an inducer binds to the repressor. The binding of the inducer to the repressor prevents the repressor from binding to the operator. RNA polymerase can then begin to transcribe operon genes.By binding to activators. Activators generally bind poorly to activator DNA sequences unless an inducer is present. Activator binds to an inducer and the complex binds to the activation sequence and activates target gene.Removing the inducer stops transcription.
In molecular biology, an inducer is a molecule that regulates gene expression. An inducer functions in two ways; namely:By disabling repressors. The gene is expressed because an inducer binds to the repressor. The binding of the inducer to the repressor prevents the repressor from binding to the operator. RNA polymerase can then begin to transcribe operon genes.By binding to activators. Activators generally bind poorly to activator DNA sequences unless an inducer is present. Activator binds to an inducer and the complex binds to the activation sequence and activates target gene.Removing the inducer stops transcription.Because a small inducer molecule is required, the increased expression of the target gene is called induction.The lactose operon is one example of an inducible system.