( ( Each molecule ) ( ( contains ( ( ( ( ( ( the genes ) ( for ( ( two ( ribosomal RNAs ) ) ( -LRB- ( ( ( ( ( s-rRNA and ) l ) - ) rRNA ) -RRB- ) ) ) ) ) , ) ( ( 22 ( transfer RNAs ) ) ( -LRB- ( tRNAs -RRB- ) ) ) ) and ) ( ( ( 12 proteins ) , ) ( ( all ( of which ) ) ( are ( transcribed ( in ( the ( same direction ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT Each) (NN molecule)) (VP (VBZ contains) (NP (NP (NP (DT the) (NNS genes)) (PP (IN for) (NP (NP (CD two) (JJ ribosomal) (NNS RNAs)) (PRN (-LRB- -LRB-) (NP (JJ s-rRNA) (CC and) (JJ l)) (, -) (NP (NNP rRNA)) (-RRB- -RRB-))))) (, ,) (NP (NP (CD 22) (NN transfer) (NNS RNAs)) (PRN (-LRB- -LRB-) (NP (NNS tRNAs)) (-RRB- -RRB-))) (CC and) (NP (NP (CD 12) (NNS proteins)) (, ,) (SBAR (WHNP (DT all) (WHPP (IN of) (WHNP (WDT which)))) (S (VP (VBP are) (VP (VBN transcribed) (PP (IN in) (NP (DT the) (JJ same) (NN direction)))))))))) (. .)))
Each molecule contains the genes for two ribosomal RNAs (s-rRNA and l- rRNA), 22 transfer RNAs (tRNAs) and 12 proteins, all of which are transcribed in the same direction.
(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.