Which enzyme is responsible for facilitating the digestion of lactose?

Lactase is the enzyme specifically responsible for the digestion of lactose, which is a sugar found in milk and dairy products. This enzyme breaks lactose down into its two component sugars, glucose and galactose, which can then be absorbed into the bloodstream. The production of lactase occurs in the small intestine, and it's essential for individuals who consume dairy products to effectively digest lactose.

Amylase, on the other hand, is involved in the digestion of carbohydrates, specifically starches, and does not act on lactose. Pepsin is an enzyme that assists in the digestion of proteins in the stomach, while glutenase is involved in breaking down gluten, the protein found in wheat and related grains. Thus, lactase is distinctly specialized for lactose digestion, making it the correct choice for this question.