Question 50

Hydrogen bonds are temporarily broken to form a new style when blow drying hair.

When blow drying hair, hydrogen bonds are the bonds that are temporarily broken, allowing the hair to be styled in a new shape as it dries.

A) disulfide

Disulfide bonds are strong covalent bonds that provide structural integrity to the hair. They are not broken during the blow-drying process; rather, they require a chemical process to be altered, making this option incorrect.

B) hydrogen

Hydrogen bonds are weak interactions that exist between water molecules and the hair structure. When heat from the blow dryer is applied, these bonds break, allowing the hair to be re-shaped and styled temporarily until they reform as the hair cools and dries, confirming this option as correct.

C) peptide

Peptide bonds are covalent bonds that link amino acids together to form proteins, including the keratin in hair. These bonds are not broken during the blow-drying process, so this option is incorrect.

D) sulfur

Sulfur bonds, often referring to disulfide bonds, contribute to the overall structure and strength of hair. Like disulfide bonds, they are not affected by the heat of blow drying in a way that allows for temporary styling changes, rendering this option incorrect.

Conclusion

In summary, hydrogen bonds are the only bonds that are temporarily altered during the blow-drying process, allowing for the styling of hair. The other options, such as disulfide, peptide, and sulfur bonds, do not break under the heat and are not involved in the temporary reshaping of hair. Thus, hydrogen bonds are definitively the correct answer.