( ( Viral vectors ) ( ( ( are ( ( a tool ) commonly ) ) ( ( used ( by ( molecular biologists ) ) ) ( to ( ( deliver ( genetic material ) ) ( into cells ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Viral) (NNS vectors)) (VP (VBP are) (ADVP (NP (DT a) (NN tool)) (RB commonly)) (VP (VBN used) (PP (IN by) (NP (JJ molecular) (NNS biologists))) (S (VP (TO to) (VP (VB deliver) (NP (JJ genetic) (NN material)) (PP (IN into) (NP (NNS cells)))))))) (. .)))
Viral vectors are a tool commonly used by molecular biologists to deliver genetic material into cells.
(ROOT (S (NP (DT A) (JJ viral) (NN vector)) (VP (VBZ is) (NP (NP (DT the) (NN name)) (PP (IN for) (NP (NP (DT a) (NN tool)) (VP (ADVP (RB commonly)) (VBN used) (PP (IN by) (NP (JJ molecular) (NNS biologists))) (S (VP (TO to) (VP (VB place) (NP (JJ genetic) (NN material)) (PP (IN into) (NP (NNS cells))))))))))) (. .)))
A viral vector is the name for a tool commonly used by molecular biologists to place genetic material into cells.