<prompt> Enzyme defect in galactosemia ?Uridyl transferaseGalactokinaseEpimeraseAll of the above  <response>: Ans. is d i.e., All of the above Galactosemia is a group of metabolic disorders which results from inborn errors due to deficiency of the enzymes of galactose metabolism.The classical galactosemia is caused by deficiency of galactose-l-phosphate uridyl transferasee.The less common types of galactosemia occur due to deficiency of galactokinaseQ and UDP - galactose-4-epimerasee. Urine of the patient shows reducing sugary galactose which can be detected by Benedicts reagent.Glucose oxidase test is negative as it is specific for glucose.Thus, presence of reducing material galactose in urine with a negative glucose oxidase test suggests diagnosis of galactosemia. 