17. A polyunsaturated fatty acid contains multiple ketones. a. b. carboxylic acids. carbon-carbon double bonds. с. d. alcohols. е. Any of the above

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Chapter1: Chemical Foundations
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### Educational Content on Fatty Acids

#### Multiple-Choice Questions

**17. A polyunsaturated fatty acid contains multiple:**
- a. ketones.
- b. carboxylic acids.
- c. carbon-carbon double bonds.
- d. alcohols.
- e. Any of the above.

**18. Which of the following choices correctly numbers linolenic acid (shown below) using the delta system?**

![Diagram of Linolenic Acid](#)

- a. Δ9,12,15
- b. Δ9
- c. Δ3,6,9
- d. Δ3,5,9
- e. Δ9,12

**19. Which of the fatty acids shown below are saturated?**

- Structure diagrams for the following:
  - **Stearic Acid**
  - **Linolenic Acid**
  - **Arachidonic Acid**

**Descriptions of Structures:**

1. **Stearic Acid:**
   - A long-chain saturated fatty acid with no double bonds, linear in structure.

2. **Linolenic Acid:**
   - A polyunsaturated fatty acid with three double bonds, causing bends in its structure.

3. **Arachidonic Acid:**
   - A polyunsaturated fatty acid, containing multiple double bonds, showing a more complex structure.

**Conceptual Explanation:**
- **Saturated fatty acids** have no carbon-carbon double bonds, resulting in straight chains that pack closely together. This characteristic gives them a solid form at room temperature.
- **Polyunsaturated fatty acids**, like linolenic acid, have multiple double bonds, introducing kinks that prevent close packing and result in a liquid form at room temperature.
Transcribed Image Text:### Educational Content on Fatty Acids #### Multiple-Choice Questions **17. A polyunsaturated fatty acid contains multiple:** - a. ketones. - b. carboxylic acids. - c. carbon-carbon double bonds. - d. alcohols. - e. Any of the above. **18. Which of the following choices correctly numbers linolenic acid (shown below) using the delta system?** ![Diagram of Linolenic Acid](#) - a. Δ9,12,15 - b. Δ9 - c. Δ3,6,9 - d. Δ3,5,9 - e. Δ9,12 **19. Which of the fatty acids shown below are saturated?** - Structure diagrams for the following: - **Stearic Acid** - **Linolenic Acid** - **Arachidonic Acid** **Descriptions of Structures:** 1. **Stearic Acid:** - A long-chain saturated fatty acid with no double bonds, linear in structure. 2. **Linolenic Acid:** - A polyunsaturated fatty acid with three double bonds, causing bends in its structure. 3. **Arachidonic Acid:** - A polyunsaturated fatty acid, containing multiple double bonds, showing a more complex structure. **Conceptual Explanation:** - **Saturated fatty acids** have no carbon-carbon double bonds, resulting in straight chains that pack closely together. This characteristic gives them a solid form at room temperature. - **Polyunsaturated fatty acids**, like linolenic acid, have multiple double bonds, introducing kinks that prevent close packing and result in a liquid form at room temperature.
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