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 responsible for linking amino acids together in a protein chain?

Peptide bond

Disulfide bond

Ionic bond

Hydrogen bond

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Verified step by step guidance

Step 1: Begin by understanding the structure of amino acids. Amino acids are the building blocks of proteins, and each amino acid contains an amino group (-NH₂), a carboxyl group (-COOH), and a unique side chain (R group).

Step 2: Learn how amino acids are linked together. Amino acids are joined through a condensation reaction (also called dehydration synthesis), where the carboxyl group of one amino acid reacts with the amino group of another amino acid.

Step 3: Understand the bond formed during this reaction. The condensation reaction results in the formation of a covalent bond called a peptide bond, with the release of a water molecule (H₂O).

Step 4: Differentiate peptide bonds from other types of bonds. Disulfide bonds are covalent bonds formed between sulfur atoms in cysteine residues, ionic bonds occur between charged groups, and hydrogen bonds are weak interactions between polar molecules. None of these are responsible for linking amino acids in the primary structure of proteins.

Step 5: Conclude that peptide bonds are the specific type of bond responsible for linking amino acids together in a protein chain, forming the primary structure of proteins.