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

Omega-3 Fatty Acids

Biochemistry

10. Lipids

Omega-3 Fatty Acids

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Multiple Choice

Draw the structure of docosahexaenoic acid (22:6Δ^{4,7,10,13,16,19}) and indicate what type of omega fatty acid it is.

a) Omega-3 fatty acid.
b) Omega-6 fatty acid.
c) Omega-9 fatty acid.
d) Omega-4 fatty acid.

Omega-3 fatty acid.

Omega-6 fatty acid.

Omega-9 fatty acid.

Omega-4 fatty acid.

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Verified step by step guidance

Identify the basic structure of docosahexaenoic acid (DHA), which is a long-chain polyunsaturated fatty acid with 22 carbon atoms and 6 double bonds.

Understand the notation 22:6Δ4,7,10,13,16,19, which indicates a fatty acid with 22 carbons and double bonds at the 4th, 7th, 10th, 13th, 16th, and 19th carbon positions.

Draw the carbon chain of DHA, starting with the carboxyl group (COOH) at one end, followed by a chain of 22 carbon atoms.

Insert the double bonds at the specified positions (4, 7, 10, 13, 16, and 19) along the carbon chain, ensuring they are in the cis configuration, which is typical for naturally occurring unsaturated fatty acids.

Determine the type of omega fatty acid by counting the number of carbons from the methyl end (CH₃) to the first double bond. Since the first double bond is at the 3rd carbon from the methyl end, DHA is classified as an omega-3 fatty acid.