Biology · No topic

Lactose is a disaccharide sugar that is primarily found in milk and dairy products. It is composed of one molecule of glucose and one molecule of galactose. This combination distinguishes lactose from other sugars such as sucrose (which is made of glucose and fructose) and maltose (which consists of two glucose molecules). Understanding the structure of lactose helps in recognizing its role in nutrition and digestion, especially for individuals who may be lactose intolerant.

This option is incorrect because lactose is not formed by two glucose molecules. Instead, it consists of two different monosaccharides.

This option is incorrect as lactose is not made up of glucose and fructose. This combination actually represents sucrose, which is table sugar.

This is the correct answer. Lactose is a disaccharide formed by the combination of glucose and galactose.

This option is incorrect because lactose does not consist of fructose. This combination does not represent any common disaccharide found in milk.