( ( occurs ( in ( ( the ( ( nucleus and ) cytoplasm ) ) ( of ( all cells ) ) ) ) ) . )
(ROOT (S (VP (VBZ occurs) (PP (IN in) (NP (NP (DT the) (NN nucleus) (CC and) (NN cytoplasm)) (PP (IN of) (NP (DT all) (NNS cells)))))) (. .)))
occurs in the nucleus and cytoplasm of all cells.
(ROOT (S (NP (NP (DT The) (NNS cells)) (PP (IN of) (NP (DT all) (NNS protists)))) (VP (VBP have) (NP (DT a) (NN nucleus))) (. .)))