<prompt> Which of the following mechanism is associated with a covalent modificationReversible phosphorylationAcetylationADP-ribosylationAll the above  <response>: Acetylation, ADP-ribosylation, methylation, and phosphorylation are all examples of reversible covalent modifications.This is very impoant pa of enzymatic regulation EX: Phosphorylation-Dephosphorylation reactions Harper 30th edition pg: 92 