What is the result of a partial perm?

• A. Breaks strong disulfide bonds
• B. Strengthens hair bonds
• C. No chemical change
• D. Remains the same

Answer: (A)

The main idea here is what chemical texturizing does to hair bonds in the parts that are treated. A perm uses a reducing agent to break disulfide bonds between cysteine units in the hair’s keratin. That bond-breaking is what lets the hair loosen its structure so you can reshape it into curls or waves. In a partial perm, only the sections that are wrapped and exposed to the chemical are affected, so those areas undergo bond disruption and can reform into a new shape, while the untreated sections stay as they were. So, the result is that the treated portions break the strong disulfide bonds, enabling the new texture. The other options describe no change or strengthening, which isn’t what happens with a perm, and would ignore the chemical changes in the treated areas.