Question:

Which of the following acid is NOT a fatty acid?

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Glucuronic acid = Sugar acid derived from Glucose (C-6 oxidation). EPA, Linolenic, and Palmitic acid are true fatty acids.
  • Eicosapentaenoic acid
  • Linolenic acid
  • Palmitic Acid
  • Glucuronic acid
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The Correct Option is D

Solution and Explanation


Step 1: Understanding the Concept:

Fatty acids are carboxylic acids with long aliphatic hydrocarbon chains, whereas uronic acids are oxidized derivatives of monosaccharide sugars.

Step 2: Detailed Explanation:

Analyzing the chemical structures:
1. Eicosapentaenoic Acid (EPA, 20:5): An omega-3 polyunsaturated long-chain fatty acid.
2. Linolenic Acid (18:3): An essential polyunsaturated fatty acid.
3. Palmitic Acid (16:0): A saturated 16-carbon fatty acid.
4. Glucuronic Acid: A sugar acid (uronic acid) derived from the oxidation of the C-6 hydroxyl group of glucose into a carboxylic acid group, playing key roles in detoxifying glucuronidation pathways and glycosaminoglycan synthesis.

Step 3: Final Answer:

Thus, Glucuronic acid is NOT a fatty acid, corresponding to option (D).
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