( Uniports ( ( are ( transporters ( that ( ( transport ( a ( single molecule ) ) ) ( across ( a membrane ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Uniports)) (VP (VBP are) (NP (NP (NNS transporters)) (SBAR (WHNP (WDT that)) (S (VP (VB transport) (NP (DT a) (JJ single) (NN molecule)) (PP (IN across) (NP (DT a) (NN membrane)))))))) (. .)))
Uniports are transporters that transport a single molecule across a 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))))))) (. .)))