I believe the statement is true. Glycoproteins on the cell membrane would prevent someone with type A blood from accepting type B blood. Glycoproteins are type of proteins that has an oligosaccharide chain or glycol that is covalently bonded to a polypeptide side-chain. This molecule is involved in almost all of the processes in a cell. It functions in the reproductive system, immune system, protection of the body and communication of the cells. It is also important for the red blood cells. Our blood types are named according to the type of glycoprotein that is present in our red blood cells. With this, it helps the body identify that your blood cells are yours and are not foreign cells.