Question

what are the basic building blocks of proteins, lipids, and polysaccharides?

Explanation:

Proteins are made of amino acids. Lipids are made of fatty acids and glycerol. Polysaccharides are made of monosaccharides (simple sugars).

Answer:

Proteins: amino acids; Lipids: fatty acids and glycerol; Polysaccharides: monosaccharides.