( ( Within ( ( the nucleus ) ( of ( every ( human cell ) ) ) ) ) ( , ( ( two long ) ( , ( ( thread-like ( DNA strands ) ) ( ( ( encode ( the instructions ) ) ( for ( making ( ( all proteins ) ( needed ( for life ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (PP (IN Within) (NP (NP (DT the) (NN nucleus)) (PP (IN of) (NP (DT every) (JJ human) (NN cell))))) (, ,) (ADVP (NP (CD two)) (RB long)) (, ,) (NP (JJ thread-like) (NN DNA) (NNS strands)) (VP (VBP encode) (NP (DT the) (NNS instructions)) (PP (IN for) (S (VP (VBG making) (NP (NP (DT all) (NNS proteins)) (VP (VBN needed) (PP (IN for) (NP (NN life))))))))) (. .)))
Within the nucleus of every human cell, two long, thread-like DNA strands encode the instructions for making all proteins needed for life.
(ROOT (S (SBAR (IN If) (S (NP (NP (DT the) (NN dna)) (PP (IN from) (NP (NP (DT all) (CD 46) (NNS chromosomes)) (PP (IN in) (NP (DT a) (JJ human) (NN cell) (NN nucleus)))))) (VP (VBD was) (VP (VBN laid) (PRT (RP out)) (NP (NN end)) (S (VP (TO to) (VP (VB end)))))))) (, ,) (NP (PRP it)) (VP (MD would) (VP (VB measure) (ADVP (NP (QP (RB approximately) (CD two)) (NNS meters)) (RB long)))) (. .)))
If the dna from all 46 chromosomes in a human cell nucleus was laid out end to end, it would measure approximately two meters long.