Carotenoids are important simple isoprenoids that function as antioxidants and as precursors of vitamin A. Another biologically important class of molecules is exemplified by the quinones and hydroquinones, which contain an isoprenoid tail attached to a quinonoid core of non-isoprenoid origin.
Karotenoider er vigtige simple isoprenoider, der fungerer som antioxidanter og forløbere for vitamin A. En anden biologisk vigtig molekyleklasse eksemplificeres af quinoner og hydroquinoner, som indeholder en isoprenoid-hale vedhæftet en quinonoid-kerne af ikke-isoprenoid oprindelse.