True regarding galactosemia
Inability to metabolise galactose occurs in galactosemia which may be caused by deficiency of galactose-1-phosphate uridyl transferase,UDP-Galactose-4-Epirnerase and galactokinase.
Out of three, most common is Galactose =1-phosphate uridyl transferase deficiency.
Mental retardation occurs
Defect in epimerase
Defect in galactose 1PO4 uridyl transferase
All the above