Kaplan Nursing Entrance Practice Exam

The enzyme maltase specifically catalyzes the hydrolysis of maltose, a disaccharide sugar, into two molecules of glucose. Maltose is composed of two glucose units linked together. The primary function of maltase in the digestive system is to assist in the breakdown of maltose to ensure that glucose, which is a form of sugar that can be easily absorbed by the body, is available for energy use.

Understanding the roles of other enzymes provides context for why maltase’s function is distinct. For example, amylase is the enzyme responsible for breaking down starch into simpler sugars, including maltose. Likewise, sucrase is the enzyme that converts sucrose into glucose and fructose, highlighting the specific functions of various digestive enzymes. Thus, maltase's unique action on maltose emphasizes its crucial role in carbohydrate digestion and absorption.