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A repressor prevents translation from occurring.
What is a translation?
Following the transcription of DNA into RNA in the cell's nucleus, translation is the process by which ribosomes in the cytoplasm or endoplasmic reticulum synthesis proteins. Expression of genes refers to the complete process.
A repressor is a DNA or RNA-binding protein that prevents one or more genes from being expressed by attaching to the operator or related silencers. A DNA-binding repressor prevents RNA polymerase from attaching to the promoter and transcribes the genes into messenger RNA. The mRNA is bound by an RNA-binding repressor, which stops the mRNA from being translated into protein. Repression is the term used to describe this suppression of expression.
If a gene-expression initiator, or inducer, is present, it can engage with the repressor protein and separate it from the operator. After that, RNA polymerase can transcribe the message (expressing the gene). A co-repressor is a substance that can attach to the repressor and tighten its bond with the operator, reducing transcription.
Silencers are segments of DNA that are found in the eukaryotic genome. To partially or completely repress a gene, these DNA sequences attach to repressors. Several bases upstream or downstream from the gene's actual promoter is where silencers can be found. Repressors may also contain two binding sites, one for the promoter and one for the silencer region. This results in chromosome looping, which places the promoter region and the silencer region close to one another.
Common examples of repressors are lac operon repressor, met operon repressor, L-arabinose operon repressor.
To learn more about repressors from the given link :
https://brainly.com/question/29438648
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