( It ( ( is ( needed ( for ( ( various ( chemical reactions ) ) ( that ( occur ( in ( ( ( ( cells , ) movement ) , ) ( ( transporting ( certain molecules ) ) ( across ( the ( cell membrane ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (PRP It)) (VP (VBZ is) (VP (VBN needed) (PP (IN for) (NP (NP (JJ various) (NN chemical) (NNS reactions)) (SBAR (WHNP (WDT that)) (S (VP (VBP occur) (PP (IN in) (S (NP (NP (NNS cells)) (, ,) (NP (NN movement)) (, ,)) (VP (VBG transporting) (NP (JJ certain) (NNS molecules)) (PP (IN across) (NP (DT the) (NN cell) (NN membrane))))))))))))) (. .)))
It is needed for various chemical reactions that occur in cells, movement, transporting certain molecules across the cell membrane.
(ROOT (S (NP (PRP You)) (VP (VBP call) (NP (NP (DT the) (NN movement)) (PP (IN of) (NP (NP (NNS molecules)) (PP (IN across) (NP (DT a) (ADJP (JJ membrane) (PP (IN without) (NP (NP (DT the) (NN input)) (PP (IN of) (NP (NN energy)))))) (JJ passive) (NN transport))))))) (. .)))