Which of the following originates from the arachidonic acid?

Options

A. Terpenes
B. Prostaglandins
C. Gangliosides
D. Cerebrosides

Answer

To determine which compounds originate from arachidonic acid, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Arachidonic Acid**:
- Arachidonic acid is a 20-carbon fatty acid that serves as a precursor for various bioactive lipids.

2. **Identify the Enzymatic Pathways**:
- Arachidonic acid can be metabolized by different enzymes, leading to the formation of specific products:
- **Lipoxygenase Pathway**: This enzyme converts arachidonic acid into leukotrienes.
- **Cyclooxygenase Pathway**: This enzyme converts arachidonic acid into prostaglandins.

3. **Evaluate the Options**:
- **Option A: Terpenes**: These are not derived from arachidonic acid; they originate from isoprene units.
- **Option B: Prostaglandins**: These are indeed formed from arachidonic acid via the cyclooxygenase pathway, making this option correct.
- **Option C: Gangliosides**: These are not derived from arachidonic acid; they are complex glycosphingolipids.
- **Option D: Cerebrosides**: These are also not derived from arachidonic acid; they are formed from uridine diphosphate.

4. **Conclusion**:
- The only compound listed that originates from arachidonic acid is **Prostaglandins**.

### Final Answer:
- **The correct answer is Option B: Prostaglandins.**

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