( ( ( The ( biochemical reactions ) ) ( that ( occur ( in ( living organisms ) ) ) ) ) ( ( ( are collectively ) ( known ( as metabolism ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ biochemical) (NNS reactions)) (SBAR (WHNP (WDT that)) (S (VP (VBP occur) (PP (IN in) (NP (VBG living) (NNS organisms))))))) (VP (VBP are) (ADVP (RB collectively)) (VP (VBN known) (PP (IN as) (NP (NN metabolism))))) (. .)))
The biochemical reactions that occur in living organisms are collectively known as metabolism.
(ROOT (S (NP (JJ Biochemical) (NNS reactions)) (VP (VBP occur) (PP (IN inside) (NP (NNS organisms)))) (. .)))