( ( A ( normal ( human cell ) ) ) ( ( has ( ( 23 pairs ) ( of ( ( ( ( chromosomes ( in ( its nucleus ) ) ) , ) each ) ( ( a ( ( single ( , ( very ( long , ) ) ) ) molecule ) ) ( of DNA ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT A) (JJ normal) (JJ human) (NN cell)) (VP (VBZ has) (NP (NP (CD 23) (NNS pairs)) (PP (IN of) (NP (NP (NP (NNS chromosomes)) (PP (IN in) (NP (PRP$ its) (NN nucleus)))) (, ,) (ADVP (DT each)) (NP (NP (DT a) (ADJP (JJ single) (, ,) (RB very) (JJ long) (, ,)) (NN molecule)) (PP (IN of) (NP (NNP DNA)))))))) (. .)))
A normal human cell has 23 pairs of chromosomes in its nucleus, each a single, very long, molecule of DNA.
(ROOT (S (NP (DT A) (JJ normal) (JJ human) (NN liver) (NN cell)) (VP (VBZ has) (NP (NP (CD 23) (NNS pairs)) (PP (IN of) (NP (NNS chromosomes))))) (. .)))