Minnesota Barber State Practice Exam

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The atoms that join neighboring cysteine amino acids together through disulfide bonds are atoms of?

  1. Sulfur

  2. Oxygen

  3. Carbon

  4. Nitrogen

The correct answer is: Sulfur

Sulfur is the element that is responsible for forming disulfide bonds between neighboring cysteine amino acids. Oxygen, carbon, and nitrogen do not have the appropriate chemical properties to form these bonds. Oxygen and nitrogen are typically involved in forming hydrogen bonds, while carbon is mostly involved in covalent bonding. Disulfide bonds, on the other hand, form between two sulfur atoms on neighboring cysteine amino acids.

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