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

Which fatty acid contains its first double bond on the sixth carbon from the methyl (omega) end?

Linoleic acid (omega-6)

Arachidonic acid (omega-3)

Oleic acid (omega-9)

Alpha-linolenic acid (omega-3)

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Verified step by step guidance

Step 1: Understand the concept of omega fatty acids. Omega fatty acids are named based on the position of the first double bond relative to the methyl (CH₃) end of the fatty acid chain. For example, omega-6 means the first double bond is located at the sixth carbon from the methyl end.

Step 2: Analyze the structure of each fatty acid provided in the options. Linoleic acid (omega-6), Arachidonic acid (omega-3), Oleic acid (omega-9), and Alpha-linolenic acid (omega-3) all have distinct positions for their first double bond.

Step 3: Focus on Linoleic acid (omega-6). Linoleic acid is classified as an omega-6 fatty acid because its first double bond is located at the sixth carbon from the methyl end. This matches the criteria described in the problem.

Step 4: Compare Linoleic acid with the other options. Arachidonic acid and Alpha-linolenic acid are omega-3 fatty acids, meaning their first double bond is at the third carbon from the methyl end. Oleic acid is an omega-9 fatty acid, meaning its first double bond is at the ninth carbon from the methyl end.

Step 5: Conclude that Linoleic acid (omega-6) is the correct answer because its first double bond is located at the sixth carbon from the methyl end, as specified in the problem.