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Which of the following would you expect to be hydrophilic? A) The interior of a cell membrane B) A water soluble peptide C) A triacylglycerol D) Fatty acid

Which of the following would you expect to be hydrophilic? A) The interior of a cell membrane B) A water soluble peptide C) A triacylglycerol D) Fatty acid

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
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### Biology Quiz **Question 9 of 19** **Which of the following would you expect to be hydrophilic?** A) The interior of a cell membrane B) A water-soluble peptide C) A triacylglycerol D) Fatty acid
Transcribed Image Text:### Biology Quiz **Question 9 of 19** **Which of the following would you expect to be hydrophilic?** A) The interior of a cell membrane B) A water-soluble peptide C) A triacylglycerol D) Fatty acid
**Question:** Which of the following is a phospholipid? **Image Description:** The image contains a question along with four different molecular structures labeled I, II, III, and IV. Each structure is visually represented inside a rectangular box on the left side of the image, and multiple-choice options are listed on the right side. **Structures:** - **Compound I:** Shows a structure with two long, zig-zagging hydrocarbon chains attached to a glycerol backbone, which is also connected to a phosphate group. - **Compound II:** Displays a molecule with a more complex structure including a sphingosine backbone and one fatty acid chain, connected to a phosphate group and an additional alcohol group. - **Compound III:** Depicts a single long, zig-zagging hydrocarbon chain attached to a carboxyl group. - **Compound IV:** Illustrates a long, straight hydrocarbon chain attached to an alcohol group. **Options:** A) Compound I B) Compound II C) Compound III D) Compound IV **Correct Answer:** **A) Compound I** **Explanation:** A phospholipid typically consists of two fatty acid tails and a phosphate group attached to a glycerol backbone. In the given options, Compound I fits this description as it includes two long, zig-zagging hydrocarbon chains attached to a glycerol backbone, with a phosphate group, representing the standard structure of a phospholipid. Compound II, while containing a phosphate group, is structured more like a sphingolipid due to its sphingosine backbone. Compounds III and IV do not meet the phospholipid criteria as III represents a simple fatty acid and IV shows an alcohol derivative.
Transcribed Image Text:**Question:** Which of the following is a phospholipid? **Image Description:** The image contains a question along with four different molecular structures labeled I, II, III, and IV. Each structure is visually represented inside a rectangular box on the left side of the image, and multiple-choice options are listed on the right side. **Structures:** - **Compound I:** Shows a structure with two long, zig-zagging hydrocarbon chains attached to a glycerol backbone, which is also connected to a phosphate group. - **Compound II:** Displays a molecule with a more complex structure including a sphingosine backbone and one fatty acid chain, connected to a phosphate group and an additional alcohol group. - **Compound III:** Depicts a single long, zig-zagging hydrocarbon chain attached to a carboxyl group. - **Compound IV:** Illustrates a long, straight hydrocarbon chain attached to an alcohol group. **Options:** A) Compound I B) Compound II C) Compound III D) Compound IV **Correct Answer:** **A) Compound I** **Explanation:** A phospholipid typically consists of two fatty acid tails and a phosphate group attached to a glycerol backbone. In the given options, Compound I fits this description as it includes two long, zig-zagging hydrocarbon chains attached to a glycerol backbone, with a phosphate group, representing the standard structure of a phospholipid. Compound II, while containing a phosphate group, is structured more like a sphingolipid due to its sphingosine backbone. Compounds III and IV do not meet the phospholipid criteria as III represents a simple fatty acid and IV shows an alcohol derivative.
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