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

Previous problemNext problem

Struggling with Organic Chemistry?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which part of an amino acid gives it its unique properties?

The carboxyl group

The amino group

The peptide bond

The side chain (R group)

Previous problemNext problem

Verified step by step guidance

Understand the structure of an amino acid: An amino acid typically consists of a central carbon atom (known as the alpha carbon), an amino group (

NH 2

), a carboxyl group (

COOH

), a hydrogen atom, and a variable side chain (R group).

Recognize the role of the amino group and carboxyl group: These groups are common to all amino acids and are involved in forming peptide bonds during protein synthesis. They do not contribute to the unique properties of individual amino acids.

Identify the peptide bond: This bond is formed between the amino group of one amino acid and the carboxyl group of another, linking amino acids together in a protein chain. It is not responsible for the unique properties of individual amino acids.

Focus on 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, and it determines the chemical nature and reactivity of the amino acid.

Explore how the side chain affects properties: The side chain can influence the amino acid's polarity, charge, hydrophobicity, and ability to form specific interactions, such as hydrogen bonds or ionic bonds, thus giving each amino acid its unique properties.