Table of contents

1. A Review of General Chemistry5h 5m
2. Molecular Representations1h 14m
3. Acids and Bases2h 46m
4. Alkanes and Cycloalkanes4h 17m
5. Chirality3h 39m
6. Thermodynamics and Kinetics1h 22m
7. Substitution Reactions1h 48m
8. Elimination Reactions2h 30m
9. Alkenes and Alkynes2h 9m
10. Addition Reactions3h 19m
11. Radical Reactions1h 58m
12. Alcohols, Ethers, Epoxides and Thiols2h 42m
13. Alcohols and Carbonyl Compounds2h 17m
14. Synthetic Techniques1h 26m
15. Analytical Techniques:IR, NMR, Mass Spect7h 3m
16. Conjugated Systems6h 13m
17. Ultraviolet Spectroscopy51m
18. Aromaticity2h 34m
19. Reactions of Aromatics: EAS and Beyond5h 1m
20. Phenols55m
21. Aldehydes and Ketones: Nucleophilic Addition4h 56m
22. Carboxylic Acid Derivatives: NAS2h 51m
23. The Chemistry of Thioesters, Phophate Ester and Phosphate Anhydrides1h 10m
24. Enolate Chemistry: Reactions at the Alpha-Carbon1h 53m
25. Condensation Chemistry2h 9m
26. Amines1h 43m
27. Heterocycles2h 0m
28. Carbohydrates5h 53m
29. Amino Acids4h 20m
30. Peptides and Proteins2h 42m
31. Catalysis in Organic Reactions1h 30m
32. Lipids 2h 50m
33. The Organic Chemistry of Metabolic Pathways2h 52m
34. Nucleic Acids1h 32m
35. Transition Metals6h 14m
36. Synthetic Polymers1h 49m

29. Amino Acids

Proteins and Amino Acids

Organic Chemistry

29. Amino Acids

Proteins and Amino Acids

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Multiple Choice

What differentiates one amino acid from another?

The carboxyl group

The side chain (R group)

The peptide bond

The amino group

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Verified step by step guidance

Understand the basic structure of an amino acid: Amino acids have a central carbon atom (known as the alpha carbon) to which four different groups are attached: an amino group (NH₂), a carboxyl group (COOH), a hydrogen atom (H), and a variable side chain (R group).

Recognize the role of the side chain (R group): The side chain is the part of the amino acid that varies among different amino acids. It can be as simple as a hydrogen atom or as complex as a ring structure. This variability is what differentiates one amino acid from another.

Explore the properties of side chains: The side chains can be polar, nonpolar, acidic, or basic, and these properties affect the amino acid's behavior and role in proteins. For example, polar side chains can form hydrogen bonds, while nonpolar side chains are hydrophobic.

Consider the impact of side chains on protein structure: The unique properties of each amino acid's side chain influence how proteins fold and function. The interactions between side chains contribute to the protein's three-dimensional structure.

Review examples of amino acids: For instance, glycine has a simple hydrogen as its side chain, while tryptophan has a complex aromatic ring. These differences illustrate how the side chain defines the identity and characteristics of each amino acid.