Which of the following metabolic disorders is characterized by an inability to convert galactose to glucose due to a deficiency of the enzyme galactose-1-phosphate uridyltransferase?

A Phenylketonuria
B Galactosemia ✓
C Fructose intolerance
D Lactose intolerance

Explanation

Galactosemia is a metabolic disorder caused by a deficiency of the enzyme galactose-1-phosphate uridyltransferase, which is necessary for the conversion of galactose to glucose.

Source

Harper's Illustrated Biochemistry
Metabolic and Nutritional Disorders Biochemistry Carbohydrate Metabolism Disorders Hard MEDICAL Confidence: high