Complex sentence: Carbohydrates have many roles in the body including functioning as, structural units, enzyme cofactors and cell surface recognition sites but, their most prevalent role is as energy storage and delivery in cellular metabolic pathways.
Split into simpler sentences: Carbohydrates have many roles in the body including functioning as structural units, enzyme cofactors and cell surface recognition sites. Their most prevalent role is in energy storage and delivery in cellular metabolic pathways.