( ( Light reactions ) ( ( take ( place ( on ( the ( actual ( thylakoid membrane ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Light) (NNS reactions)) (VP (VBP take) (NP (NP (NN place)) (PP (IN on) (NP (DT the) (JJ actual) (JJ thylakoid) (NN membrane))))) (. .)))
Light reactions take place on the actual thylakoid membrane.
(ROOT (S (NP (DT The) (JJ light) (NNS reactions)) (VP (VBP take) (NP (NP (NN place)) (PP (IN in) (NP (DT the) (NN thylakoid))))) (. .)))