Give an example of a eukaryotic regulatory mechanism that occurs: (a) during transcription (b) during translation (c) after translation

(a) A regulatory mechanism that occurs during eukaryotic transcription is methylation of cytosine bases in the promoter region; this silences the gene and prevents transcription. (b) A regulatory mechanism that occurs during eukaryotic translation is the addition of a variable-length adenine tail. (c) A regulatory mechanism that occurs after eukaryotic translation is the chemical modification of some of the residues on the protein to render it active.