A single gene produces messenger RNA that relays information from the nucleus' DNA to the cytoplasm, where protein synthesis takes place.
- The process of using a gene's information to create a functioning gene product, typically a protein, is known as gene expression. Gene expression involves processes like transcription, in which the RNA polymerase enzyme copies a portion of DNA into mRNA.
- RNA splicing is necessary because the mRNA that is produced during transcription is not yet mature (e.g. excision of introns). Then, mature mRNA is exported from the nucleus to the cytoplasm. Translation - mRNA acts as a source of data that specifies how one or more proteins should be made.
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