( ( The ribosome ) ( ( is ( ( a ( multisubunit structure ) ) ( containing ( ( rRNA and ) proteins ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN ribosome)) (VP (VBZ is) (NP (NP (DT a) (JJ multisubunit) (NN structure)) (VP (VBG containing) (NP (NN rRNA) (CC and) (NNS proteins))))) (. .)))
The ribosome is a multisubunit structure containing rRNA 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.