The enzyme defect in galactosemia is
Inability to metabolize galactose occurs in the galactosemias, which may be caused by inherited defects of galactokinase, uridyl transferase, or 4-epimerase Though deficiency of uridyl transferase is best known.Harper 30th edition pg: 205
Aldose reductase
Galactose-1-phosphate uridyltransferase
Galactokinase
Aldolase B
Metabolism of carbohydrate