<prompt> Which of the following is true about capping of RNA following its synthesisOccurs at 3 end of RNAOccurs in nucleus of cellSpecific to MRNA of ProkaryotesS-adenosyl methionine SAM acts as methyl donor  <response>: 7 - Methylguanosine attached to 5 end of RNA is called capping of RNA.Refer byte Post transcriptional modification. 