NANP Board Practice Exam 2025 - Free NANP Board Practice Questions and Study Guide

Question: 1 / 400

Which enzyme is responsible for helping to break down sucrose into individual fructose and glucose molecules?

Amylase

Lactase

Sucrase

The enzyme that specifically catalyzes the breakdown of sucrose into its component monosaccharides, fructose and glucose, is sucrase. This enzyme is also known as invertase, and it plays a critical role in carbohydrate digestion by hydrolyzing the glycosidic bond in sucrose.

Amylase is responsible for breaking down starches into simpler sugars like maltose and is not involved with sucrose. Lactase, on the other hand, aids in the breakdown of lactose, which is the sugar found in milk, and does not act on sucrose. Trypsin is a proteolytic enzyme that digests proteins into smaller peptides and amino acids, having no association with carbohydrate metabolism.

Therefore, sucrase is the correct enzyme for the breakdown of sucrose, directly addressing the question regarding the specific enzymatic action on this disaccharide.

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Trypsin

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