( ( The ( virus ( nucleic acid ) ) ) ( ( is ( encapsidated ( by ( a protein ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN virus) (JJ nucleic) (NN acid)) (VP (VBZ is) (VP (VBN encapsidated) (PP (IN by) (NP (DT a) (NN protein))))) (. .)))
The virus nucleic acid is encapsidated by a protein.
(ROOT (S (NP (JJ Nucleic) (NNS acids)) (VP (VBP are) (VP (VBN found) (PP (IN in) (S (RB all) (VP (VBG living) (NP (NNS cells) (CC and) (NNS viruses))))))) (. .)))
Nucleic acids are found in all living cells and  viruses.