Biliverdin and bilirubin are: pigments that form during the breakdown of the non-iron portion of home. compound that transport iron in the bloodstream storage molecules for iron in the liver and spleen. precursors to hemoglobin seen in immature red blood cells. former members of the Indy band \"Billy and the Break Down Boys\". Solution A) pigments that form during the breakdown of the non iron portion of the heme. Bilverdin and bilurubin are pigments that are formed during the catabolism of hemoglobin in red blood cells. The RBC are continuously undergoing haemolysis and form heme,iron and globin . The heme intially breaks down into bilverdin and later into bilirubin. The bilverdin is a green pigment which is reduced into yellow colour bilrubin. Iron is reused for RBC formation and Globin will split of..