<prompt> Which of the following carbohydrate metabolism is used for liver function assessment?Galactose intolerance testSucrose intolerance testGlucose intolerance testLactose intolerance test  <response>: Ans: a Galactose intolerance test Ref: Vasudevan 4th edp.484Galactose is almost exclusively metabolised by liver.The rate limiting step is initial conversion of galactose to galactose-1 -phosphate.The rate of utilisation of galactose is directly proportional to functional liver mass.Reactions and its rate limiting enzymes:-1 Glycolysis - Phosphofructokinase2 Glycogen synthesis - Glycogen synthetase3 Glycogenolysis - Glycogen phosphorylase4 TCA cycle - Isocitrate dehydrogenase5 Fatty acid synthesis - Acetyl CoA carboxylase6 Cholesterol synthesis - HMG CoA reductase7 Ketone body synthesis - HMG CoA synthetase8 Bile acid synthesis - 7-?-hydroxylase9 Catecholamine synthesis - Tyrosine hydroxylase10 Urea synthesis - Carbamoyl transferase 