Table of contents

1. Introduction to Biochemistry4h 34m
2. Water3h 23m
3. Amino Acids8h 10m
4. Protein Structure10h 4m
5. Protein Techniques14h 5m
6. Enzymes and Enzyme Kinetics13h 38m
7. Enzyme Inhibition and Regulation 8h 42m
8. Protein Function 9h 41m
9. Carbohydrates7h 49m
10. Lipids5h 49m
11. Biological Membranes and Transport 6h 37m
12. Biosignaling9h 45m
Review 1: Nucleic Acids, Lipids, & Membranes2h 47m
Review 2: Biosignaling, Glycolysis, Gluconeogenesis, & PP-Pathway3h 12m
Review 3: Pyruvate & Fatty Acid Oxidation, Citric Acid Cycle, & Glycogen Metabolism2h 26m
Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation1h 48m

10. Lipids

Fatty Acids

Biochemistry

10. Lipids

Fatty Acids

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Multiple Choice

Omega-3 fatty acids do not include which of the following fatty acids?

Eicosapentaenoic acid (EPA, 20:5, \(\omega\)-3)

Docosahexaenoic acid (DHA, 22:6, \(\omega\)-3)

Alpha-linolenic acid (ALA, 18:3, \(\omega\)-3)

Arachidonic acid (20:4, \(\omega\)-6)

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Verified step by step guidance

Step 1: Understand the classification of omega-3 fatty acids. Omega-3 fatty acids are a type of polyunsaturated fatty acid characterized by the presence of a double bond at the third carbon atom from the methyl end (denoted as \\(\omega-3\\)). Examples include Eicosapentaenoic acid (EPA), Docosahexaenoic acid (DHA), and Alpha-linolenic acid (ALA).

Step 2: Analyze the given fatty acids. Eicosapentaenoic acid (EPA, 20:5, \\(\omega-3\\)), Docosahexaenoic acid (DHA, 22:6, \\(\omega-3\\)), and Alpha-linolenic acid (ALA, 18:3, \\(\omega-3\\)) are all classified as omega-3 fatty acids because their first double bond is located at the third carbon from the methyl end.

Step 3: Examine the structure of Arachidonic acid (20:4, \\(\omega-6\\)). Arachidonic acid is a polyunsaturated fatty acid, but its first double bond is located at the sixth carbon from the methyl end, making it an \\(\omega-6\\) fatty acid, not an \\(\omega-3\\).

Step 4: Compare the classifications. Since omega-3 fatty acids are defined by the position of the first double bond at the third carbon, Arachidonic acid (20:4, \\(\omega-6\\)) does not belong to the omega-3 category.

Step 5: Conclude that the correct answer is Arachidonic acid (20:4, \\(\omega-6\\)), as it is not an omega-3 fatty acid but rather an omega-6 fatty acid.