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

32. Lipids

Intro to Lipids

Organic Chemistry

32. Lipids

Intro to Lipids

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Multiple Choice

What structural feature makes lipids hydrophobic?

Ability to form hydrogen bonds with water

Presence of ionic charges

High density of polar functional groups

Presence of long hydrocarbon chains

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Verified step by step guidance

Understand the term 'hydrophobic': In chemistry, 'hydrophobic' refers to the tendency of a molecule to repel water or not mix with water. This is typically due to the lack of polar groups that can interact with water molecules.

Identify the structural feature of lipids: Lipids are a diverse group of compounds, but they generally share a common feature of having long hydrocarbon chains or rings.

Analyze the nature of hydrocarbon chains: Hydrocarbon chains are composed of carbon and hydrogen atoms. These chains are nonpolar, meaning they do not have a charge distribution that can interact with polar water molecules.

Relate nonpolarity to hydrophobicity: Because hydrocarbon chains are nonpolar, they do not form hydrogen bonds with water, making them hydrophobic. This is why lipids do not dissolve in water.

Conclude the structural feature responsible for hydrophobicity: The presence of long hydrocarbon chains in lipids is the key structural feature that makes them hydrophobic, as these chains do not interact favorably with water.