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

3. Amino Acids

Amino Acid Groups

Biochemistry

3. Amino Acids

Amino Acid Groups

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Multiple Choice

The primary structure of an amino acid is based upon which of the following?

The interactions between multiple polypeptide subunits

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

The linear sequence of amino acids in a polypeptide chain

The arrangement of side chains in the three-dimensional space

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Verified step by step guidance

Step 1: Understand the concept of primary structure in proteins. The primary structure refers to the linear sequence of amino acids in a polypeptide chain, connected by peptide bonds.

Step 2: Differentiate the primary structure from other levels of protein structure. For example, secondary structure involves folding into alpha-helices and beta-sheets, tertiary structure involves the three-dimensional arrangement of side chains, and quaternary structure involves interactions between multiple polypeptide subunits.

Step 3: Recall that the primary structure is determined by the genetic code and is the foundation for all higher levels of protein structure. The sequence of amino acids dictates how the protein will fold and function.

Step 4: Eliminate incorrect options by matching each description to its corresponding level of protein structure. For example, folding into alpha-helices and beta-sheets corresponds to secondary structure, not primary structure.

Step 5: Confirm that the correct answer is 'The linear sequence of amino acids in a polypeptide chain,' as this directly defines the primary structure of a protein.