NANP Board Practice Exam

Which of the following enzymes helps in the digestion of lactose?

1. Amylase

2. Lactase

3. Lipase

4. Protease

The correct answer is: Amylase

The enzyme that plays a crucial role in the digestion of lactose is lactase. Lactase is specifically responsible for breaking down lactose, the sugar found in milk and dairy products, into glucose and galactose, which can then be absorbed by the body. Without adequate lactase, individuals may experience discomfort or digestive issues when consuming dairy, a condition known as lactose intolerance. Amylase primarily aids in the digestion of carbohydrates, specifically starches, into simpler sugars. Lipase is involved in the breakdown of fats into fatty acids and glycerol, while protease focuses on the digestion of proteins into amino acids. Each of these enzymes has a distinct function, but none are effective in breaking down lactose. Thus, lactase is the correct answer for digestion associated specifically with lactose.