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

Which structural feature of fats contributes to their hydrophobic nature?

High density of polar functional groups

Ability to form hydrogen bonds with water

Presence of long hydrocarbon chains

Presence of ionic charges

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Verified step by step guidance

Understand the concept of hydrophobicity: Hydrophobic molecules tend to repel water and do not mix well with it. This is often due to the lack of polar functional groups that can interact with water molecules.

Examine the structural features of fats: Fats are primarily composed of long hydrocarbon chains, which are nonpolar. Nonpolar molecules do not have a charge distribution that can interact with polar water molecules.

Consider the role of polar functional groups: Polar functional groups, such as hydroxyl (-OH) or carboxyl (-COOH) groups, can form hydrogen bonds with water, making a molecule more hydrophilic. Fats lack these polar groups in their hydrocarbon chains.

Evaluate the ability to form hydrogen bonds: Hydrogen bonding occurs between molecules that have polar functional groups. Since fats have long hydrocarbon chains without these groups, they cannot form hydrogen bonds with water.

Assess the presence of ionic charges: Ionic charges can interact with water due to the polar nature of water molecules. Fats do not have ionic charges in their structure, contributing to their hydrophobic nature.