試題詳解

22. All of the following are true for tRNA EXCEPT:
(A) each amino acid in proteins has at least one unique tRNA species dedicated to chauffeuring its delivery to ribosomes for insertion into growing polypeptides.
(B) are small molecules containing 73-94 residues.
(C) fold into characteristic secondary structures.
(D) possess a 3'terminal nucleotide sequence that reads -CCA.
(E) all are true.