( ( ( The rate ) ( of ( enzyme ( controlled reactions ) ) ) ) ( ( is ( dependent ( upon ( ( internal ( environmental factors ) ) ( such ( as ( ( pH and ) temperature ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NN rate)) (PP (IN of) (NP (JJ enzyme) (JJ controlled) (NNS reactions)))) (VP (VBZ is) (ADJP (JJ dependent) (PP (IN upon) (NP (NP (JJ internal) (JJ environmental) (NNS factors)) (PP (JJ such) (IN as) (NP (NN pH) (CC and) (NN temperature))))))) (. .)))
The rate of enzyme controlled reactions is dependent upon internal environmental factors such as pH and temperature.
(ROOT (S (NP (NP (NNP Temperature)) (CC and) (NP (NN ph) (NN level))) (VP (VBP are) (ADJP (JJ important) (PP (IN in) (NP (NP (DT the) (NN activity)) (PP (IN of) (NP (DT an) (NN enzyme))))))) (. .)))