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

Tertiary Structure of Protein

Biochemistry

4. Protein Structure

Tertiary Structure of Protein

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Multiple Choice

True or False: At pH 2, Gln & Met R-groups can form a salt bridge to stabilize tertiary structure.

True

False

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Verified step by step guidance

Understand the concept of a salt bridge: A salt bridge is a type of non-covalent interaction that occurs between oppositely charged side chains of amino acids, typically involving acidic and basic residues.

Identify the R-groups of Gln (Glutamine) and Met (Methionine): Glutamine has an amide group in its side chain, while Methionine has a thioether group. Neither of these groups carries a charge at physiological pH or at pH 2.

Consider the conditions for salt bridge formation: For a salt bridge to form, one amino acid must have a positively charged side chain (like lysine or arginine) and the other a negatively charged side chain (like aspartate or glutamate).

Evaluate the pH condition: At pH 2, the environment is highly acidic, which can affect the ionization state of amino acid side chains. However, Gln and Met do not have ionizable side chains that would carry a charge at this pH.

Conclude based on the analysis: Since neither Gln nor Met has charged side chains at pH 2, they cannot form a salt bridge. Therefore, the statement is false.