<prompt> Bilirubin is absent in urine because it is -Distributed in the body fatConjugated with glucoronideNot filterableLipophilic  <response>: Unconjugated bilirubin cannot be excreted in urine because:-i It is lipophilic lipid soluble but not water soluble, i.e. it is hydrophobic ii It is tightly bound to albumin, thus cannot be filtered at glomeruli. 