Maryland Cosmetology State Practice Exam

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What determines a third of hair's strength?

  1. Disulfide bond only

  2. Hydrogen bond only

  3. Each type of bond contributes equally

  4. Salt bond only

The correct answer is: Each type of bond contributes equally

Each of the bonds mentioned (disulfide bond, hydrogen bond, salt bond) play a significant role in determining hair strength, but none of them alone can account for one third of hair's strength. The disulfide bond is the strongest bond, but it contributes less to overall strength than the hydrogen and salt bonds. The hydrogen bond is important for maintaining the shape and elasticity of hair, but it is also not the sole determining factor. The salt bond provides less strength than both the disulfide and hydrogen bonds, but still plays a significant role. Therefore, it is the combination of these three bonds that contributes equally to hair's strength, rather than just one specific type of bond.

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