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.
The 3rd type of RNA made from DNA is the Transfer RNA (tRNA). It also starts out as a single-stranded piece of DNA, but then it bends back on itself forming a hair-pin or cloverleaf type structure. Only one part is exposed and it contains the ANTI-CODON.