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

Side groups (R groups) of amino acids are typically classified under which of the following categories?

Hydrophobic, hydrophilic, amphipathic, and zwitterionic

Primary, secondary, tertiary, and quaternary

Aromatic, aliphatic, saturated, and unsaturated

Nonpolar, polar uncharged, acidic, and basic

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Verified step by step guidance

Understand the classification of amino acid side groups (R groups). Amino acids are categorized based on the chemical properties of their side chains, which influence their behavior in proteins and biological systems.

Recognize the four main categories of amino acid side groups: Nonpolar, polar uncharged, acidic, and basic. These classifications are based on the side chain's ability to interact with water and other molecules.

Nonpolar side groups are hydrophobic and typically consist of hydrocarbon chains or rings. Examples include alanine and valine.

Polar uncharged side groups are hydrophilic and contain functional groups like hydroxyl (-OH) or amide (-CONH2) that can form hydrogen bonds. Examples include serine and glutamine.

Acidic and basic side groups are charged at physiological pH. Acidic side chains, like those in aspartic acid and glutamic acid, have a negative charge, while basic side chains, like those in lysine and arginine, have a positive charge.