Starch and glycogen are polymers of glucose that belong to which category?

• A. Proteins
• B. Lipids
• C. Nucleic acids
• D. Carbohydrates

Answer: (D)

Starch and glycogen are polymers of glucose, so they belong to the carbohydrate family. Carbohydrates are made from sugar units, and when many glucose units join, they form polysaccharides. Starch stores energy in plants, while glycogen stores energy in animals and fungi. These molecules are built from glucose through glycosidic bonds, making them long chains that function primarily as energy reserves. They are not proteins (amino acids), lipids (fatty substances), or nucleic acids (nucleotides), so the correct category is carbohydrates.