Stuttering is a speech disorder characterized by repetition of sounds, syllables, or words; prolongation of sounds; and interruptions in speech known as blocks. An individual who stutters exactly knows what he or she would like to say but has trouble producing a normal flow of speech.
The 3 types of RNA are mRNA is a long strand, the tRNA is shaped  like a clover leaf pattern. The third shape is Ribosomal RNA, it  is a very complex shape.
Those three types of RNA have radically different functions. While mRNA is translated into a protein, rRNA and tRNA are both forms of non-coding RNA performing both structural and catalytic roles. mRNA: Messenger RNA is the type of RNA that encodes proteins and is translated by the ribosome into proteins.