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

Reactions of Amino Acids: Ninhydrin Test

Organic Chemistry

29. Amino Acids

Reactions of Amino Acids: Ninhydrin Test

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Multiple Choice

Which of the following amino acids would not create an aldehyde as a by-product?

Cysteine

Valine

Proline

Histidine

Glycine

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Verified step by step guidance

Understand the question: We need to identify which amino acid does not produce an aldehyde as a by-product. This typically involves understanding the structure and possible reactions of each amino acid.

Examine the structures: Look at the chemical structures of the amino acids provided in the image. Each amino acid has a unique side chain that can influence its chemical behavior.

Consider the reaction: Amino acids can undergo oxidative deamination, where the amino group is removed and converted into an aldehyde. This is more likely to occur in amino acids with side chains that can easily form aldehydes.

Analyze Proline: Proline is unique because it has a secondary amine in a cyclic structure, which makes it less likely to undergo oxidative deamination to form an aldehyde compared to other amino acids with primary amines.

Conclude: Based on the structure and the typical reactions, Proline is the amino acid that would not create an aldehyde as a by-product due to its cyclic structure and secondary amine.