( ( Because ( ( active ( transport proteins ) ) ( have ( energy ( available ( to them ) ) ) ) ) ) ( , ( they ( ( are ( able ( to ( ( ( move ( molecules ( across ( cell membranes ) ) ) ) ( from ( ( the ( lower concentration ) ) ( of ( those molecules ) ) ) ) ) ( to ( ( the ( higher concentration ) ) ( of ( those molecules ) ) ) ) ) ) ) ) . ) ) ) )
(ROOT (S (SBAR (IN Because) (S (NP (JJ active) (NN transport) (NNS proteins)) (VP (VBP have) (NP (NP (NN energy)) (ADJP (JJ available) (PP (TO to) (NP (PRP them)))))))) (, ,) (NP (PRP they)) (VP (VBP are) (ADJP (JJ able) (S (VP (TO to) (VP (VB move) (NP (NP (NNS molecules)) (PP (IN across) (NP (NN cell) (NNS membranes)))) (PP (IN from) (NP (NP (DT the) (JJR lower) (NN concentration)) (PP (IN of) (NP (DT those) (NNS molecules))))) (PP (TO to) (NP (NP (DT the) (JJR higher) (NN concentration)) (PP (IN of) (NP (DT those) (NNS molecules)))))))))) (. .)))
Because active transport proteins have energy available to them, they are able to move molecules across cell membranes from the lower concentration of those molecules to the higher concentration of those molecules.
(ROOT (S (NP (DT The) (NN term) (JJ passive) (NN transport)) (VP (VBZ describes) (NP (DT a) (NN way)) (SBAR (IN that) (S (NP (JJ small) (NNS molecules) (CC or) (NNS ions)) (VP (VBP move) (PP (IN across) (NP (NP (DT the) (NN cell)) (VP (VBN membrane) (PP (IN without) (NP (NP (NN input)) (PP (IN of) (NP (NN energy))))) (PP (IN by) (NP (DT the) (NN cell)))))))))) (. .)))