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

2. Molecular Representations

Functional Groups

Organic Chemistry

2. Molecular Representations

Functional Groups

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Multiple Choice

Which of the following functional groups is present in all amino acids?

Aldehyde group

Carboxyl group

Ketone group

Ether group

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Verified step by step guidance

Understand the structure of an amino acid: Amino acids are organic compounds that contain both an amino group (-NH₂) and a carboxyl group (-COOH).

Identify the functional groups listed in the problem: Aldehyde group, Carboxyl group, Ketone group, and Ether group.

Recall the definition of each functional group: An aldehyde group contains a carbonyl center (C=O) bonded to a hydrogen atom. A carboxyl group consists of a carbonyl group (C=O) and a hydroxyl group (OH) attached to the same carbon atom. A ketone group has a carbonyl group (C=O) bonded to two carbon atoms. An ether group consists of an oxygen atom connected to two alkyl or aryl groups.

Determine which functional group is common to all amino acids: Since all amino acids have a carboxyl group (-COOH) as part of their structure, this is the functional group present in all amino acids.

Conclude that the carboxyl group is the correct answer, as it is the functional group found in every amino acid, unlike the other groups listed.