Energy-yielding Cell nutrients macromolecules Carbohydrates Proteins Fats Polysaccharides Proteins Lipids Nucleic acids The energy supply ADP HPOZ NAD and demand in NADP Catabolism Anabolism Heterotrophs ATP NADH NADPH the ATP-ADP Chemical energy Cyc cle Energy.poor Precursor end products molecules Amino acids Sugars Fatty acids Nitrogenous aseThe energy supply and demand in Heterotrophs: the ATP-ADP cycle