<prompt> Which of the following molecules delivers iron to tissues by binding to specific cell surface receptors:FerritinFerredoxinHemosiderinTransferrin  <response>: Transferrin is a b1-globulin synthesized in the liver and is the transpoer of iron. Transpo of Iron For transpo, ferrous iron needs to be oxidised to ferric iron. This is done by hephaestin, a membrane-associated ferroxidase protein. In the blood, ceruloplasmin, a copper-containing ferroxidase oxidises any ferrous iron to ferric iron Transferrin can carry 2 molecules of ferric ion. apo transferrin 2 Fe3 Holo-transferrin Transferrin delivers the iron to different tissue cells by recpetor mediated endocytosis. The iron can be incorporated into various iron-containing proteins or stored in ferritin. Additional edge Iron storage form: Ferritin and Haemosiderin Fe3. Regulate iron transpo in circulation: Hepcidin Fe2. The presence of carbohydrate-deficient transferrin CDT, which can be measured by isoelectric focusing IEF, is used as a biomarker of chronic alcoholism. 