( Ribosomes ( ( are ( composed ( of ( ( a ( ( ( small and ) large ) subunit ) ) ( both ( consisting ( of ( rRNA ( ( molecules and ) proteins ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Ribosomes)) (VP (VBP are) (VP (VBN composed) (PP (IN of) (NP (NP (DT a) (ADJP (JJ small) (CC and) (JJ large)) (NN subunit)) (PP (CC both) (S (VP (VBG consisting) (PP (IN of) (NP (NN rRNA) (NNS molecules) (CC and) (NNS proteins)))))))))) (. .)))
Ribosomes are composed of a small and large subunit both consisting of rRNA molecules and proteins.
(ROOT (S (NP (DT A) (NN ribosome)) (VP (VBZ consists) (PP (IN of) (NP (NP (CD two) (NNS elements)) (, ,) (NP (NN rrna)) (CC and) (NP (NNS proteins))))) (. .)))
A ribosome consists of two elements, rrna and proteins.