The building blocks of carbohydrates are known as

• A. Amino acids
• B. Monosaccharides
• C. Nucleotides
• D. Fatty acids

Answer: (B)

Carbohydrates are built from simple sugar units called monosaccharides. These are the smallest units that can be linked together to form larger carbohydrates. When monosaccharides join, they form disaccharides like sucrose or lactose, and when many join, they create polysaccharides such as starch, glycogen, and cellulose. Examples of common monosaccharides include glucose, fructose, and galactose. The other options correspond to other types of biomolecules—amino acids form proteins, nucleotides form nucleic acids, and fatty acids form lipids—whereas monosaccharides are the fundamental units that make up carbohydrates.