<prompt> Norepinephrine to epinephrine conversion requires which enzyme:Phenylethanolamine-N-methyltransferaseTransaldolaseTyrosine hydroxylaseAlpha ketoglutarate  <response>: Ans:A.Phenylethanolamine-N-methyltransferaseMethylation of norepinephrine by S-adenosyl-methionine gives epinephrine, reaction being catalysed by phenylethanolamine N-methyltransferase Phenylethanolamine N-methyltransferase PNMTIt is an enzyme found in the adrenal medulla that conves Norepinephrine Noradrenaline to Epinephrine Adrenaline.PNMT is positively influenced by coisol, which is produced in the adrenal coex.S-adenosyl-L-methionine SAM is a required cofactor. 