Question

which of the following are associated with proteins? a peptide bonds b nucleotides c monosaccharides d hydrophilic heads and hydrophobic tails

Explanation:

Proteins are polymers of amino - acids. Amino - acids are linked together by peptide bonds to form polypeptide chains, which then fold to form proteins. Nucleotides are associated with nucleic acids (DNA and RNA). Monosaccharides are the building blocks of carbohydrates. Hydrophilic heads and hydrophobic tails are characteristic of phospholipids in cell membranes.

Answer:

A. peptide bonds