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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
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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# Educational Content: Identifying Phospholipids ## Question: ### Which of the following is a phospholipid? **Options:** - A) Compound I - B) Compound II - C) Compound III - D) Compound IV ## Diagram Explanation: The diagram presents four different chemical structures labeled as Compounds I, II, III, and IV. Each structure is a representation of different types of lipids or molecules, and your task is to identify which one among them is a phospholipid. ### Compound I: - Consists of a phosphate group (PO₄³⁻) attached to glycerol (three-carbon molecule). - The glycerol is esterified with two fatty acids and the phosphate group is linked to a choline molecule via a phosphodiester bond. ### Compound II: - Composed of a long hydrocarbon chain with a terminal carboxyl group, characteristic of a fatty acid. ### Compound III: - Resembles a monoglyceride structure, with glycerol bonded to a single fatty acid via an ester linkage. ### Compound IV: - Showcases a fatty acid derivative structure with a hydroxyl group attached to the hydrocarbon chain but lacks the defining phosphate group. ## Correct Answer: **A) Compound I** Compound I is a phospholipid because it has a phosphate group linked to glycerol and two fatty acid chains, forming the primary structure of a phospholipid. Phospholipids are critical components of cellular membranes, playing a major role in cell structure and signaling. --- This transcription and detailed description are designed to help students understand the basic structure of phospholipids and differentiate them from other lipid molecules.
Transcribed Image Text:# Educational Content: Identifying Phospholipids ## Question: ### Which of the following is a phospholipid? **Options:** - A) Compound I - B) Compound II - C) Compound III - D) Compound IV ## Diagram Explanation: The diagram presents four different chemical structures labeled as Compounds I, II, III, and IV. Each structure is a representation of different types of lipids or molecules, and your task is to identify which one among them is a phospholipid. ### Compound I: - Consists of a phosphate group (PO₄³⁻) attached to glycerol (three-carbon molecule). - The glycerol is esterified with two fatty acids and the phosphate group is linked to a choline molecule via a phosphodiester bond. ### Compound II: - Composed of a long hydrocarbon chain with a terminal carboxyl group, characteristic of a fatty acid. ### Compound III: - Resembles a monoglyceride structure, with glycerol bonded to a single fatty acid via an ester linkage. ### Compound IV: - Showcases a fatty acid derivative structure with a hydroxyl group attached to the hydrocarbon chain but lacks the defining phosphate group. ## Correct Answer: **A) Compound I** Compound I is a phospholipid because it has a phosphate group linked to glycerol and two fatty acid chains, forming the primary structure of a phospholipid. Phospholipids are critical components of cellular membranes, playing a major role in cell structure and signaling. --- This transcription and detailed description are designed to help students understand the basic structure of phospholipids and differentiate them from other lipid molecules.
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