Lactose intolerance is due to -: (A) Deficiency of Galactokinase, (B) Deficiency of Uridyl transferase, (C) Deficiency of Lactase, (D) Deficiency of Enteropeptidase
Answer is C. Ans. is 'c' i.e.. Deficiency of Lactase Lactose intoleranceo It occurs due to deficiency of lactase, the most important member of b-galactosidase enzymatic class.o Lactase hydrolyses lactose into glucose and galactose in the small intestine.o Lactose is present in milk.o Therefore, deficiency oflactase, (b-galaetosidase) results in intolerance to milk and other dairy products.o Clinical features are bloating, diarrhea, failure to thrive, abdominal distension and abdominal cramp.