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

Primary Structure of Protein

Biochemistry

4. Protein Structure

Primary Structure of Protein

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Multiple Choice

Which of the following best describes the primary structure of a polypeptide?

The local folding of the polypeptide chain into alpha-helices and beta-sheets

The overall three-dimensional shape of a single polypeptide chain

The linear sequence of amino acids joined by peptide bonds

The association of multiple polypeptide subunits into a functional protein complex

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Verified step by step guidance

Step 1: Understand the concept of protein structure hierarchy. Proteins have four levels of structure: primary, secondary, tertiary, and quaternary. Each level describes a different aspect of the protein's organization.

Step 2: Define the primary structure of a polypeptide. The primary structure refers to the linear sequence of amino acids in the polypeptide chain, connected by peptide bonds. This sequence is determined by the genetic code.

Step 3: Differentiate the primary structure from other levels. Secondary structure involves local folding into alpha-helices and beta-sheets, tertiary structure describes the overall three-dimensional shape of a single polypeptide, and quaternary structure refers to the association of multiple polypeptide subunits.

Step 4: Analyze the options provided in the question. Identify which description matches the definition of the primary structure (linear sequence of amino acids joined by peptide bonds).

Step 5: Conclude that the correct answer is the option describing the linear sequence of amino acids joined by peptide bonds, as this is the definition of the primary structure of a polypeptide.