( ( ( ( ( RNA ( consists ( of ( ( a ( single strand ) ) ( of nucleotides ) ) ) ) ) , ) and ) ( DNA ( consists ( of ( ( two strands ) ( of ( nucleotides ( that ( are ( connected ( by ( ( hydrogen bonds ) ( along ( ( the length ) ( of ( the chain ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NNP RNA)) (VP (VBZ consists) (PP (IN of) (NP (NP (DT a) (JJ single) (NN strand)) (PP (IN of) (NP (NNS nucleotides))))))) (, ,) (CC and) (S (NP (NNP DNA)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD two) (NNS strands)) (PP (IN of) (NP (NP (NNS nucleotides)) (SBAR (WHNP (WDT that)) (S (VP (VBP are) (VP (VBN connected) (PP (IN by) (NP (NP (NN hydrogen) (NNS bonds)) (PP (IN along) (NP (NP (DT the) (NN length)) (PP (IN of) (NP (DT the) (NN chain))))))))))))))))) (. .)))
RNA consists of a single strand of nucleotides, and DNA consists of two strands of nucleotides that are connected by hydrogen bonds along the length of the chain.
(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)))))) (. .)))