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

Which statement concerning proteins is not correct?

Proteins are composed of amino acids linked by peptide bonds.

Proteins can function as enzymes, hormones, and structural components.

Proteins can be denatured by changes in temperature and pH.

Proteins are primarily composed of nucleotides.

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Verified step by step guidance

Understand the basic structure of proteins: Proteins are macromolecules composed of amino acids linked together by peptide bonds. Each amino acid has an amino group, a carboxyl group, and a unique side chain.

Recognize the functions of proteins: Proteins serve various roles in biological systems, including acting as enzymes to catalyze biochemical reactions, functioning as hormones to regulate physiological processes, and providing structural support in cells and tissues.

Learn about protein denaturation: Proteins can lose their functional shape due to changes in environmental conditions such as temperature and pH. This process is known as denaturation, which can affect the protein's ability to perform its biological functions.

Clarify the composition of proteins versus nucleotides: Proteins are not composed of nucleotides. Nucleotides are the building blocks of nucleic acids like DNA and RNA, whereas proteins are made up of amino acids.

Identify the incorrect statement: The statement 'Proteins are primarily composed of nucleotides' is incorrect because proteins are composed of amino acids, not nucleotides.