Question

proteins are important biomolecules that build organisms and direct chemical reactions. proteins are polymers composed of long chains of a nucleotides b amino acids c phospholipids d monosaccharides

Explanation:

Proteins are polymers made up of long - chains of amino acids. Nucleotides are building blocks of nucleic acids, phospholipids are part of cell membranes, and monosaccharides are building blocks of carbohydrates.

Answer:

B. amino acids