( ( Enzymes Enzymes ) ( ( are ( proteins ( that ( acts ( as ( ( a catalyst ) ( in ( biochemical reactions ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Enzymes) (NNP Enzymes)) (VP (VBP are) (NP (NP (NNS proteins)) (SBAR (WHNP (WDT that)) (S (VP (VBZ acts) (PP (IN as) (NP (NP (DT a) (NN catalyst)) (PP (IN in) (NP (JJ biochemical) (NNS reactions)))))))))) (. .)))
Enzymes Enzymes are proteins that acts as a catalyst in biochemical reactions.
(ROOT (S (PP (IN In) (NP (DT a) (JJ biological) (NN reaction))) (, ,) (NP (NNS proteins)) (VP (VBP act) (PP (IN as) (NP (NNS catalysts)))) (. .)))