All of the following are phospholipids, EXCEPT?: (A) Cardiolipin, (B) Cerebroside, (C) Sphingomyelin, (D) Surfactant lipid
Answer is B. Phospholipids are those Lipids that contain phosphorus (mainly as a phosphate group) e.g. glycerophospholipids. Cerebrosides is group of glycosphingolipids called monoglycosylceramides. They Do not contain Phosphorus (see fig below). Sphingomyelin is the only sphingolipid with a phosphate group. Surfactants are lipoproteinaceous substances synthesized in alveolar type II cells, which facilitate gas exchange by lowering alveolar surface tension. It contains significant amounts of phospholipid dipalmitoyl phosphatidylcholine.