Source: wikibot/gene-expression
= Gene expression
{wiki=Gene_expression}
Gene expression is the biological process through which the information encoded in a gene is used to produce a functional gene product, usually a protein, but it can also refer to the production of non-coding RNA molecules such as rRNA, tRNA, or microRNA. This process involves several key steps: 1. **Transcription**: The DNA sequence of a gene is transcribed into messenger RNA (mRNA) by RNA polymerase.