Wyoming State Board Cosmetology Practice Exam 2025 - Free Cosmetology Exam Questions and Study Guide

Question: 1 / 400

Which type of bond is broken during the perming process?

Covalent bonds

Hydrogen bonds

Ionic bonds

Disulfide bonds

During the perming process, disulfide bonds are the specific type of bond that are broken. Disulfide bonds are formed between the sulfur atoms of the amino acids cysteine in hair, creating strong connections that help maintain the hair's structure and shape. The perming process involves the use of a reducing agent that breaks these disulfide bonds, allowing the hair to be reshaped into curls or waves.

Once the disulfide bonds are broken, the hair can take on a new form, and then an oxidizing agent is applied during the second step of the perming process to reform these disulfide bonds in the desired shape. This two-step method is what allows for the long-lasting curly or wavy styles that perms are known for. In summary, the alteration of disulfide bonds is crucial to changing the hair's texture during the perming process.

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