( DNA ( ( consists ( of ( ( two strands ) ( of ( nucleotides ( ( twisted together ) ( in ( a ( double helix ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP DNA)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD two) (NNS strands)) (PP (IN of) (NP (NP (NNS nucleotides)) (VP (VBN twisted) (ADVP (RB together)) (PP (IN in) (NP (DT a) (JJ double) (NN helix))))))))) (. .)))
DNA consists of two strands of nucleotides twisted together in a double helix.
(ROOT (S (NP (NNP Dna)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD two) (JJ long) (NNS chains)) (PP (IN of) (NP (NNS nucleotides)))))) (. .)))