NAFC Nutrition Coach 2026 – 400 Free Practice Questions to Pass the Exam

Fructose, galactose, deoxyribose, and ribose are all classified as monosaccharides, which are the simplest forms of carbohydrates. Monosaccharides consist of single sugar molecules that cannot be hydrolyzed into smaller carbohydrate units.

Fructose and galactose are hexoses, meaning they contain six carbon atoms, while ribose and deoxyribose are pentoses, having five carbon atoms. These sugars play essential roles in biology; for example, ribose and deoxyribose are pivotal components of nucleotides, which make up RNA and DNA.

In contrast, disaccharides are composed of two monosaccharide units linked together; polysaccharides consist of long chains of monosaccharides, and oligosaccharides contain a few monosaccharides (typically between 2 to 10). Understanding that fructose, galactose, deoxyribose, and ribose are single, standalone sugar molecules highlights their classification as monosaccharides. This helps in understanding the broader categorization of carbohydrates and their significance in nutrition and metabolic processes.