Wikimedia Commons has media related to Gene expression.

Gene expression is the multi-step process by which a gene's information is converted into the structures and functions of a cell, following the central dogma of molecular biology.

Types	Bacterial Archaeal Eukaryotic
Key elements	Transcription factor RNA polymerase Promoter
Post-transcription	Precursor mRNA (pre-mRNA / hnRNA) 5' capping Splicing Polyadenylation Histone acetylation and deacetylation

Types	Bacterial Archaeal Eukaryotic
Key elements	Ribosome Transfer RNA (tRNA) Ribosome-nascent chain complex (RNC) Post-translational modification

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