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

Fatty Acids

Organic Chemistry

32. Lipids

Fatty Acids

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Multiple Choice

What is the primary structural difference between a saturated fatty acid and an unsaturated fatty acid?

Saturated fatty acids are always liquid at room temperature, while unsaturated fatty acids are solid.

Saturated fatty acids have a longer carbon chain than unsaturated fatty acids.

Saturated fatty acids have no double bonds between carbon atoms, while unsaturated fatty acids have one or more double bonds.

Saturated fatty acids contain a carboxyl group, while unsaturated fatty acids do not.

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Verified step by step guidance

Identify the basic structure of a fatty acid, which consists of a long hydrocarbon chain and a terminal carboxyl group \( \text{(-COOH)} \).

Understand that the term 'saturated' refers to the presence of only single bonds between the carbon atoms in the hydrocarbon chain. This means that each carbon atom is bonded to as many hydrogen atoms as possible.

Recognize that 'unsaturated' fatty acids contain one or more double bonds \( \text{(C=C)} \) within the hydrocarbon chain. These double bonds introduce kinks in the chain, affecting the physical properties of the fatty acid.

Note that the presence of double bonds in unsaturated fatty acids prevents the molecules from packing closely together, which typically results in a liquid state at room temperature. In contrast, saturated fatty acids can pack tightly and are usually solid at room temperature.

Conclude that the primary structural difference between saturated and unsaturated fatty acids is the presence of double bonds in the hydrocarbon chain of unsaturated fatty acids, while saturated fatty acids have no double bonds.