( ( ( The energy ) ( released ( by ( these ( redox reactions ) ) ) ) ) ( ( is ( used ( to ( generate ( ATP ( , ( NADPH ( , ( and O2 ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN energy)) (VP (VBN released) (PP (IN by) (NP (DT these) (NN redox) (NNS reactions))))) (VP (VBZ is) (VP (VBN used) (S (VP (TO to) (VP (VB generate) (NP (NNP ATP) (, ,) (NNP NADPH) (, ,) (CC and) (NNP O2))))))) (. .)))
The energy released by these redox reactions is used to generate ATP,NADPH, and O2.
(ROOT (S (NP (DT A) (JJ voltaic) (NN cell)) (VP (VBZ generates) (NP (DT an) (JJ electric) (NN current)) (PP (IN through) (NP (NP (DT a) (NN reaction)) (VP (VBN known) (PP (IN as) (NP (DT a) (PRN (-LRB- -LRB-) (NP (NN n)) (-RRB- -RRB-)) (JJ spontaneous) (NN redox))))))) (. .)))