( ( During ( ( the ( S phase ) ) ( of ( the cycle ) ) ) ) ( , ( DNA ( ( ( ( directs ( ( the synthesis ) ( of ( new DNA ) ) ) ) and ) ( replicates itself ) ) . ) ) ) )
(ROOT (S (PP (IN During) (NP (NP (DT the) (NNP S) (NN phase)) (PP (IN of) (NP (DT the) (NN cycle))))) (, ,) (NP (NNP DNA)) (VP (VP (VBZ directs) (NP (NP (DT the) (NN synthesis)) (PP (IN of) (NP (JJ new) (NN DNA))))) (CC and) (VP (VBZ replicates) (NP (PRP itself)))) (. .)))
During the S phase of the cycle, DNA directs the synthesis of new DNA and replicates itself.
(ROOT (S (PP (IN During) (NP (NP (DT the) (NN synthesis) (NN phase)) (PP (IN in) (NP (DT the) (NN cell) (NN cycle))))) (, ,) (NP (NN dna) (NN replication)) (VP (VBZ occurs)) (. .)))