<prompt> Which of the following chemical reaction is involved in the conversion of noradrenaline to adrenaline?HydroxylationCarboxylationMethylationDehydrogenation  <response>: Catecholamines are derivatives of phenylalaninetyrosine. Nor in noradrenaline norepinephrine indicates the absence of methyl group. The methyl group of adrenaline epinephrine is derived from S-Adenosyl methionine AdoMet 