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

Eicosanoids

Biochemistry

10. Lipids

Eicosanoids

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Multiple Choice

Which of the following is true regarding eicosanoids?
A) All eicosanoids contain three conjugated double bonds.
B) All eicosanoids contain arachidonic acid and sphingosine.
C) Prostaglandins and leukotrienes both contain a ring structure.
D) Thromboxanes, prostaglandins & leukotrienes all contain a carboxyl group.

All eicosanoids contain three conjugated double bonds.

All eicosanoids contain arachidonic acid and sphingosine.

Prostaglandins and leukotrienes both contain a ring structure.

Thromboxanes, prostaglandins & leukotrienes all contain a carboxyl group.

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Verified step by step guidance

Understand the structure of eicosanoids: Eicosanoids are signaling molecules derived from arachidonic acid, a 20-carbon polyunsaturated fatty acid. They include prostaglandins, thromboxanes, and leukotrienes.

Analyze option A: Eicosanoids do not all contain three conjugated double bonds. While some may have conjugated double bonds, it is not a universal feature of all eicosanoids.

Evaluate option B: Eicosanoids are derived from arachidonic acid, but they do not contain sphingosine. Sphingosine is a component of sphingolipids, not eicosanoids.

Consider option C: Prostaglandins contain a cyclopentane ring, but leukotrienes do not have a ring structure. Therefore, this statement is incorrect.

Review option D: Thromboxanes, prostaglandins, and leukotrienes all contain a carboxyl group as part of their structure, which is consistent with their derivation from fatty acids. This makes option D the correct statement.