Question

Which of the following pair is monosaccharide?

• A. Glucose and Fructose
• B. Glucose and Sucrose
• C. Ribose and Maltose
• D. Ribose and Sucrose

Answer 1

Answer: (A)

Glucose and Fructose

Monosaccharides are the fundamental unit of carbohydrates which cannot be further hydrolyzed to smaller components. The general formula of monosaccharides is C${}_n$H${}_{2n}$O${}_n$. Chemical formula for glucose and fructose is C${}_6$H${}_{12}$O${}_6$ and for Ribose is C${}_5$H${}_{10}$O${}_5$. Thus, glucose, fructose, and ribose are monosaccharides. On the other hand, the chemical formula for Sucrose and Maltose is C${}_{12}$H${}_{22}$O${}_{11}$, hence they are disaccharides. Thus, the correct answer is A.