<prompt> Which type of RNA has the highest percentage of modified base?mRNAtRNArRNAsnRNA  <response>: The transfer RNAs show extensive internal base pairing and acquire cloverleaf-like structureThey contain significant propoion of unusual basesThese include dihydrouracil, pseudouridine, and hypoxanthineRef: DM VASUDEVAN, 7th edition, page no: 596,597 