<prompt> All are true about bilirubin , EXCEPT:Hydrophobic and toxic compoundIt is a tetrapyrroleDaily production is 4 mgkgMost hemoglobin is derived from ineffective erythropoiesis  <response>: Bilirubin Hydrophobic and potentially toxic compound It is tetrapyrrole and an end product of heme degradation. Daily production is 4 mgkg of bilirubin . Most bilirubin 70 to 80 is derived from degradation of hemoglobin Minor component arises from ineffective erythropoiesis Ref:Sleisenger and Fordtrans,E-9,P-323 