( ( ( The roles ) ( of ( ( the ( four ( essential types ) ) ) ( of ( organic ( compounds ( , ( carbohydrates ( , ( lipids ( , ( proteins ( , ( and ( nucleic acids ) ) ) ) ) ) ) ) ) ) ) ) ) ) ) ( ( ( will also ) ( be ( discussed ( in detail ) ) ) ) . ) )
(ROOT (S (NP (NP (DT The) (NNS roles)) (PP (IN of) (NP (NP (DT the) (CD four) (JJ essential) (NNS types)) (PP (IN of) (NP (JJ organic) (NNS compounds) (, ,) (NNS carbohydrates) (, ,) (NNS lipids) (, ,) (NNS proteins) (, ,) (CC and) (NN nucleic) (NNS acids)))))) (VP (MD will) (ADVP (RB also)) (VP (VB be) (VP (VBN discussed) (PP (IN in) (NP (NN detail)))))) (. .)))
The roles of the four essential types of organic compounds, carbohydrates, lipids, proteins, and nucleic acids will also be discussed in detail.
(ROOT (S (NP (NNS Carbohydrates)) (VP (VBP are) (NP (NP (DT the) (ADJP (RBS most) (JJ common)) (NN type)) (PP (IN of) (NP (JJ organic) (NN compound))))) (. .)))