Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

4. Protein Structure

Peptide Bond

Biochemistry

4. Protein Structure

Peptide Bond

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Multiple Choice

Which type of bond is primarily responsible for maintaining the primary structure of a protein?

Disulfide bond

Peptide bond

Ionic bond

Hydrogen bond

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Verified step by step guidance

Understand the concept of protein structure: Proteins have four levels of structure—primary, secondary, tertiary, and quaternary. The primary structure refers to the linear sequence of amino acids in the polypeptide chain.

Identify the type of bond involved in the primary structure: The primary structure is maintained by covalent bonds between amino acids, specifically peptide bonds, which link the carboxyl group of one amino acid to the amino group of another.

Clarify what a peptide bond is: A peptide bond is a covalent bond formed through a dehydration reaction, where a molecule of water is removed as the carboxyl group (-COOH) of one amino acid reacts with the amino group (-NH2) of another amino acid.

Compare peptide bonds to other bond types: Disulfide bonds, ionic bonds, and hydrogen bonds are involved in higher levels of protein structure (secondary, tertiary, and quaternary) but do not play a role in maintaining the primary structure.

Conclude that peptide bonds are the correct answer: Peptide bonds are the primary type of bond responsible for maintaining the linear sequence of amino acids in the primary structure of a protein.