Arkansas Barber Practice Exam

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Study for the Arkansas Barber Exam with our interactive quiz that includes flashcards and multiple choice questions. This resource is designed to help you master the concepts needed to succeed in your licensing test.

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Amino acids are joined end-to-end by ______________.

Ionic Bonds
Covalent Bonds
Hydrogen Bonds
Peptide Bonds

The correct answer is: Peptide Bonds

Amino acids are joined together through a process known as dehydration synthesis, which forms a covalent bond between the carboxyl group of one amino acid and the amino group of another. This type of bond is called a peptide bond. Ionic bonds involve the electrostatic attraction between positively and negatively charged ions, and hydrogen bonds are weak interactions between a hydrogen atom and an electronegative atom. While both types of bonds may play a role in the folding and structure of proteins, they do not connect amino acids in a chain like peptide bonds do. Therefore, the correct answer is D.