Which type of carbohydrate is classified as a disaccharide?

The classification of carbohydrates includes various types based on the number of sugar molecules they contain. A disaccharide is specifically defined as a carbohydrate that consists of two monosaccharide units linked together. This makes the choice that describes a carbohydrate made from two sugar molecules the correct answer.

Disaccharides play significant roles in nutrition and include common sugars such as sucrose (table sugar) and lactose (milk sugar). These compounds are formed through a condensation reaction where two monosaccharides combine, releasing a molecule of water.

The other types of carbohydrates differ in their structure and complexity. A carbohydrate made from three sugar molecules would be classified as a trisaccharide, while one made from many sugar molecules is classified as a polysaccharide. Carbohydrates that contain fiber refer to indigestible plant polysaccharides, which serve various health benefits but do not fit the definition of disaccharides. Understanding these classifications helps in comprehending the various roles carbohydrates play in our diet.