Question

The disaccharide composed of galactose bound to glucose is broken down into those two monosaccharides by the digestive enzyme

A) sucrase.

B) lactase.

C) alpha glucosidase.

D) alpha amylase.

E) maltase.

Answer 1

B. Lactase

The disaccharide composed of galactose bound to glucose is broken down into two monosaccharide by the digestive enzyme lactase. Glucose and galactose are the monosaccharides they form disaccharide lactose. Lactose is broken down by lactase , a digestive enzyme present in the brush border membrane of enterocytes villi of small intestine.

Sucrase helps in breaking down of sucrose , a disaccharide composed of glucose and fructose.

Alpha glucosidase breaks down starch and disaccharide to glucose.

Alpha amylase hydrolyse starch or glycogen into glucose and maltose.

Maltase breaks down maltose , a disaccharide composed of 2 molecules of glucose.