20. Inorganic nutrients that are necessary for normal metabolism are called. minerals. vitamins. lecithin. eicosanoids. 21. The energy-requiring process by which small molecules are joined to form larger molecules is specifically called. metabolism.anabolism.catabolism.norganic nutrients that are necessary for normal metabolism are called. minerals. vitamins. lecithin. eicosanoids. 21. The energy-requiring process by which small molecules are joined to form larger molecules is specifically called. metabolism. anabolism. catabolism.