Question

multiple - choice question
an individual experiences abdominal discomfort after consuming a drink containing milk. a loss of function of which enzyme is most likely responsible for the symptoms?
maltase that breaks down the bond between galactose and glucose
lactase that breaks down the bond between galactose and glucose
lactose that breaks down the bond between two glucose molecules
maltose that breaks down the bond between two glucose molecules

Explanation:

Lactose intolerance occurs when there is a deficiency of lactase enzyme. Lactase breaks down lactose (a sugar in milk) into galactose and glucose. A lack of lactase causes abdominal discomfort after consuming milk - based products. Maltase breaks down maltose, not lactose. Lactose is a sugar, not an enzyme.

Answer:

B. lactase that breaks down the bond between galactose and glucose