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?

Carboxyl group

Ketone group

Aldehyde group

Ether group

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Verified step by step guidance

Understand the structure of an amino acid: Amino acids are the building blocks of proteins and have a general structure consisting of a central carbon atom (alpha carbon) bonded to four different groups.

Identify the four groups attached to the alpha carbon in an amino acid: These groups are an amino group (\(\text{NH}_2\)), a carboxyl group (\(\text{COOH}\)), a hydrogen atom, and a variable side chain (R group) that determines the identity of the amino acid.

Recognize the functional groups listed in the problem: The options given are carboxyl group, ketone group, aldehyde group, and ether group.

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

Conclude that the carboxyl group is the correct answer: The carboxyl group is a defining feature of amino acids, distinguishing them from other organic compounds that may contain ketone, aldehyde, or ether groups.