Biology

The correct answer is D.a protein.

Explanation:

D.A protein is a macromolecule, which is a large molecule composed of many monomers (specifically amino acids) linked together by peptide bonds. Proteins are polymers of amino acids, making them much larger than their monomer units.

A.A glucose molecule is a monomer of carbohydrates, specifically the building block of polysaccharides like starch or glycogen.

Click "Show Answer" to reveal the answer and analysis