Which enzyme is NOT involved in carbohydrate digestion?

The enzyme that is not involved in carbohydrate digestion is protease. Carbohydrate digestion primarily involves enzymes that break down carbohydrates into simpler sugars. Amylase, maltase, and sucrase are all enzymes specifically designed to process carbohydrates.

Amylase begins the process of carbohydrate digestion in the mouth and continues in the small intestine, breaking down starches into simpler sugars like maltose. Maltase further breaks down maltose into glucose, while sucrase is responsible for converting sucrose into glucose and fructose. These enzymes play essential roles in ensuring that carbohydrates can be absorbed into the bloodstream for energy.

In contrast, protease is an enzyme that targets proteins and is involved in their digestion, breaking down proteins into amino acids. Therefore, it has no role in the digestion of carbohydrates, highlighting why it is the correct answer to the question.