The peptide bond is __________.

• A. a hydrogen bond joining amino acids together to form a polypeptide
• B. a covalent bond joining simple sugars together to form a polypeptide
• C. a hydrogen bond joining nucleotides together to form a nucleic acid
• D. a covalent bond joining nucleotides together to form a nucleic acid
• E. a covalent bond joining amino acids together to form a polypeptide

Answer: (E)

Verified step by step guidance

1. Understand the definition of a peptide bond: A peptide bond is a type of covalent bond that specifically forms between the carboxyl group of one amino acid and the amino group of another amino acid.
2. Recognize the components involved in forming a peptide bond: The bond forms between amino acids, which are the building blocks of proteins.
3. Identify the process of peptide bond formation: This bond is formed through a dehydration synthesis reaction, where a molecule of water is removed as the bond is created.
4. Differentiate between types of bonds: Covalent bonds involve the sharing of electron pairs between atoms, whereas hydrogen bonds are weaker interactions involving a hydrogen atom and an electronegative atom.
5. Apply this knowledge to the options given: The correct description of a peptide bond is 'a covalent bond joining amino acids together to form a polypeptide.'