<prompt> What isare true about bilirubin?Conjugation is rate limiting stepBilirubin has affinity for elastinConjugated bilirubin is maximum in bloodAll  <response>: Ans. is b i.e., Bilirubin has affinity for elastino Excretion of conjugated bilirubin into biliary canaliculi is the rate limiting step in bilirubin metabolism o Bilirubin has affinity for elastin, therefore jaundice is most easily seen in the sclera.o Normally unconjugated bilirubin is more than conjugated bilirubin, in bloodTotal bilirubin 0.3 -- 1.9 mgdlConjugated bilirubin -- 0 to 0.3 mgdlUnconjugated bilirubin -- Total - conjugated 0.3 -- 1.6 mgdlo Normally hemoglobin content of blood is between 120-160 gmL Harrison 17the p. A-2, and a normal adult usually have 5 litre of blood. So total hemoglobin is 600-800 gm. 