( ( Within ( the ribosome ) ) ( , ( ( transfer ( ( RNA molecules ) ( ( ( ( ( recognise ( specific ( trinucleotide codons ) ) ) ( on ( the mRNA ) ) ) , ) and ) ( ( add ( their ( cognate ( amino acids ) ) ) ) ( to ( nascent ( protein chains ) ) ) ) ) ) ) . ) ) )
(ROOT (S (PP (IN Within) (NP (DT the) (NN ribosome))) (, ,) (VP (VB transfer) (S (NP (NNP RNA) (NNS molecules)) (VP (VP (VB recognise) (NP (JJ specific) (NN trinucleotide) (NNS codons)) (PP (IN on) (NP (DT the) (NN mRNA)))) (, ,) (CC and) (VP (VB add) (NP (PRP$ their) (JJ cognate) (JJ amino) (NNS acids)) (PP (TO to) (NP (JJ nascent) (NN protein) (NNS chains))))))) (. .)))
Within the ribosome, transfer RNA molecules recognise specific trinucleotide codons on the mRNA, and add their cognate amino acids to nascent protein chains.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NP (DT a) (NN chain)) (PP (IN of) (NP (JJ amino) (NNS acids)))) (VP (VBZ reaches) (NP (DT a) (NN stop) (NN codon))))) (, ,) (VP (VBN released) (PP (IN from) (NP (DT the) (NN ribosome)))) (. .)))