Chemical Texture Services

What is defined as compounds made up of carbon, oxygen, hydrogen, nitrogen, and sulfur? Polypeptide chains

• Peptide bonds

• Amino acids

• Keratin proteins

• Polypeptide chains

What is defined as chemical bonds that join amino acids together, end-to-end in long chains, to form a polypeptide chain?

• Peptide bonds

• Amino acids

• Keratin proteins

• Polypeptide chains

What are long chains of amino acids joined together by peptide bonds?

• Peptide bonds

• Amino acids

• Keratin proteins

• Polypeptide chains

What are long, coiled polypeptide chains?

• Peptide bonds

• Amino acids

• Keratin proteins

• Polypeptide chains

What are disulfide, salt, and hydrogen bonds that cross-link polypeptide chains together called?

• Peptide bonds

• Keratin proteins

• Polypeptide chains

• Side Bonds

What are strong chemical side bonds formed when the sulfur atoms in two adjacent protein chains are joined together?

• Hydrogen Bond

• Disulfide Bond

• Salt Bond

• Side Bond

What are relatively weak physical side bonds that are easily broken by changes in pH, and they re-form when the pH returns to normal levels?

• Hydrogen Bond

• Disulfide Bond

• Salt Bond

• Side Bond

What are weak physical side bonds that are easily broken by water or heat, and they re-form as the hair dries or cools? Side Bond

• Hydrogen Bond

• Disulfide Bond

• Salt Bond

• Side Bond

Where in the hair is the chemical change happening?

• Cuticle

• Medulla

• Cortex

• Hair strand

What is acidic on the pH scale?

• 6-9

• 8-14

• 0-6

• 7