Macronutrients 95%or more of cell dry weight is made up of a few major elements:carbon,oxygen,hydrogen, nitrogen,sulfur,phosphorus,potassium, calcium,magnesium and iron. The first six C,H,O,N,P and S)are components of carbohydrates,lipids,proteins and nucleic acids Macronutrients • 95% or more of cell dry weight is made up of a few major elements: carbon, oxygen, hydrogen, nitrogen, sulfur, phosphorus, potassium, calcium, magnesium and iron. • The first six ( C, H, O, N, P and S) are components of carbohydrates, lipids, proteins and nucleic acids