Which of the following disaccharides is commonly found in milk?

Explanation

Lactose is the natural sugar found in milk from mammals. It consists of glucose and galactose molecules bonded together.

Babies produce an enzyme called lactase that breaks down lactose into simpler sugars for digestion. Many adults lose this ability, leading to lactose intolerance.

Sucrose is table sugar from plants, maltose comes from grains, and fructose is fruit sugar. Only lactose is the characteristic sugar in dairy products.