( ( Definitions Metabolism ) ( ( is ( all ( of ( ( the ( chemical reactions ) ) ( that ( occur ( in ( an organism ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Definitions) (NNP Metabolism)) (VP (VBZ is) (NP (NP (DT all)) (PP (IN of) (NP (NP (DT the) (JJ chemical) (NNS reactions)) (SBAR (WHNP (WDT that)) (S (VP (VBP occur) (PP (IN in) (NP (DT an) (NN organism)))))))))) (. .)))
Definitions Metabolism is all of the chemical reactions that occur in an organism.
(ROOT (S (NP (NP (DT The) (NN sum)) (PP (IN of) (NP (NP (DT all) (JJ chemical) (NNS reactions)) (SBAR (WHNP (WDT that)) (S (VP (VBP take) (NP (NN place)) (PP (IN within) (NP (DT an) (NN organism))))))))) (VP (VBZ is) (VP (VBN known) (PP (IN as) (NP (NN metabolism))))) (. .)))
The sum of all chemical reactions that take place within an organism is known as metabolism.