What do peptide bonds connect in the structure of hair?

Peptide bonds are essential in the structure of hair as they connect amino acids, which are the building blocks that form polypeptides. When amino acids link together through peptide bonds, they create long chains known as polypeptides. These polypeptide chains eventually coil and fold to form proteins, such as keratin, which is a primary component of hair.

This connection is crucial because the specific sequence and arrangement of amino acids in the chain determine the properties and function of the resultant protein. Keratin, formed from these polypeptides, gives hair its strength, structure, and resilience. Understanding the role of peptide bonds helps in comprehending how hair is structured at a molecular level and the importance of proteins in hair care and health.

The other answer choices do not accurately describe the role of peptide bonds in hair. Carbohydrates, fatty acids, and minerals do not form the structural basis of hair in the same way that amino acids linked by peptide bonds do.