( ( ( The ( total energy ) ) ( for ( a ( given reaction ) ) ) ) ( ( may ( involve ( ( the breaking ) ( of ( ( ( bonds ( in ( the ( reacting molecules ) ) ) ) ( as ( well as ) ) ) ( ( ( the formation ) ( of ( the ( new bonds ) ) ) ) ( which ( are ( present ( in ( the ( product molecules ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (JJ total) (NN energy)) (PP (IN for) (NP (DT a) (VBN given) (NN reaction)))) (VP (MD may) (VP (VB involve) (NP (NP (DT the) (NN breaking)) (PP (IN of) (NP (NP (NP (NNS bonds)) (PP (IN in) (NP (DT the) (JJ reacting) (NNS molecules)))) (CONJP (RB as) (RB well) (IN as)) (NP (NP (DT the) (NN formation)) (PP (IN of) (NP (DT the) (JJ new) (NNS bonds))) (SBAR (WHNP (WDT which)) (S (VP (VBP are) (ADJP (JJ present) (PP (IN in) (NP (DT the) (NN product) (NNS molecules))))))))))))) (. .)))
The total energy for a given reaction may involve the breaking of bonds in the reacting molecules as well as the formation of the new bonds which are present in the product molecules.
(ROOT (S (NP (JJ Catabolic) (NNS reactions)) (VP (VBP involve) (S (VP (VBG breaking) (NP (NNS bonds))))) (. .)))