( ( The research ) ( ( ( demonstrates ( for ( the ( first time ) ) ) ) ( that ( ( a ( precursor ( to ( transfer ( ( RNA-the ( genetic material ) ) ( that ( is ( responsible ( for ( synthesizing proteins-could ) ) ) ) ) ) ) ) ) ) ( have ( ( acted ( as ( ( the catalyst ) ( for reactions ) ) ) ) ( that ( link ( ( transfer ( RNA ( -LRB- ( tRNA -RRB- ) ) ) ) ( to ( ( amino acids ) ( in ( a ( pre-biological era ) ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN research)) (VP (VBZ demonstrates) (PP (IN for) (NP (DT the) (JJ first) (NN time))) (SBAR (IN that) (S (NP (DT a) (NN precursor) (S (VP (TO to) (VP (VB transfer) (NP (NP (JJ RNA-the) (JJ genetic) (NN material)) (SBAR (WHNP (WDT that)) (S (VP (VBZ is) (ADJP (JJ responsible) (PP (IN for) (S (VP (VBG synthesizing) (ADJP (JJ proteins-could)))))))))))))) (VP (VBP have) (VP (VBN acted) (PP (IN as) (NP (NP (DT the) (NN catalyst)) (PP (IN for) (NP (NNS reactions))))) (SBAR (IN that) (S (NP (NN link)) (VP (VB transfer) (NP (NNP RNA) (-LRB- -LRB-) (NNP tRNA) (-RRB- -RRB-)) (PP (TO to) (NP (NP (JJ amino) (NNS acids)) (PP (IN in) (NP (DT a) (JJ pre-biological) (NN era))))))))))))) (. .)))
The research demonstrates for the first time that a precursor to transfer RNA-the genetic material that is responsible for synthesizing proteins-could have acted as the catalyst for reactions that link transfer RNA (tRNA) to amino acids in a pre-biological era.
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