( ( ( The DNA ) ( is ( composed ( of ( two ( long ( molecular strands ) ) ) ) ) ) ) ( , ( ( ( wrapped ( around one ) ) ( another ( in ( ( the ( familiar shape ) ) ( of ( a ( double helix ) ) ) ) ) ) ) . ) ) )
(ROOT (SINV (S (NP (DT The) (NN DNA)) (VP (VBZ is) (VP (VBN composed) (PP (IN of) (NP (CD two) (JJ long) (JJ molecular) (NNS strands)))))) (, ,) (VP (VBD wrapped) (PP (IN around) (NP (CD one)))) (NP (NP (DT another)) (PP (IN in) (NP (NP (DT the) (JJ familiar) (NN shape)) (PP (IN of) (NP (DT a) (JJ double) (NN helix)))))) (. .)))
The DNA is composed of two long molecular strands, wrapped around one another in the familiar shape of a double helix.
(ROOT (S (NP (DT The) (JJ double) (NN helix) (NN dna) (NN shape)) (VP (VBZ forms) (SBAR (WHADVP (WRB when)) (S (NP (DT the) (CD two) (JJ nucleotide) (NNS chains)) (VP (VB wrap) (PRT (RP around)) (NP (DT the) (JJ same) (NNS axis)))))) (. .)))