( ( INTRODUCTION Metabolism ) ( ( refers ( to ( ( all ( the ( biochemical reactions ) ) ) ( that ( occur ( in ( a ( ( cell or ) organism ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP INTRODUCTION) (NNP Metabolism)) (VP (VBZ refers) (PP (TO to) (NP (NP (PDT all) (DT the) (JJ biochemical) (NNS reactions)) (SBAR (WHNP (WDT that)) (S (VP (VBP occur) (PP (IN in) (NP (DT a) (NN cell) (CC or) (NN organism))))))))) (. .)))
INTRODUCTION Metabolism refers to all the biochemical reactions that occur in a cell or organism.
(ROOT (S (NP (JJ Biochemical) (NNS reactions)) (VP (VBP take) (NP (NP (NN place)) (PP (IN inside) (NP (NP (DT the) (NNS organisms) (POS ')) (NNS cells))))) (. .)))