<prompt> Metastasis of cancer has its roots in structural abnormalities ofGlycolipids in nervous tissueGlycoproteins on cell surfaceLipoproteins in bloodNone of the above  <response>: DiseaseAbnormalityMetastasis of cancer cellsAbnormalities in the oligosaccharide chains of membrane glycoproteins and glycolipids are thought to be of impoanceReference: Harper;s Biochemistry; 30th edition; Chapter 40 Membranes: Structure Function 