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 of the following best represents the backbone atom arrangement of two peptide bonds?

Cα----N----Cα----C----Cα----N----Cα----C.

Cα----N----C----C----N----Cα.

C----N----Cα----Cα----C----N.

Cα----C----N----Cα----C----N.

Cα----Cα----C----N----Cα----Cα----C.

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Verified step by step guidance

Understand the structure of a peptide bond: A peptide bond is formed between the carboxyl group of one amino acid and the amino group of another, resulting in a C-N bond.

Identify the repeating unit in a polypeptide chain: The backbone of a polypeptide chain consists of repeating units of -N-Cα-C- where N is the nitrogen atom of the amine group, Cα is the alpha carbon, and C is the carbonyl carbon.

Analyze the given options: Look for the sequence that correctly represents the repeating unit of the peptide backbone, which should include the sequence -Cα-C-N-.

Check for continuity: Ensure that the sequence can be repeated to form a continuous chain, which is characteristic of polypeptides.

Select the correct option: The correct sequence should be Cα----C----N----Cα----C----N, as it accurately represents the backbone arrangement of two peptide bonds in a polypeptide chain.