What are the products of the breakdown of lactose by lactase?
A. Glucose plus galactose and water
B. Glucose plus fructose
C. Glucose plus fructose and water
D. Glucose plus galactose

The correct answer is D. Glucose plus galactose

Explanation:

Lactose is a disaccharide found in dairy. It is made up of monosaccharides: glucose and galactose. Its chemical structure its structure is of β-D-galactopyranosyl- (1 → 4) -D-glucopyranose; a bond occurs between carbon 1 of galactose and carbon 4 of glucose. The lactase enzyme produced by the small intestine (it is a β-galactosidase) decomposes the lactose in these two sugars.

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