Which of the following hormones does not contain a polypeptide ?

Options

A. Insulin
B. Oxytocin
C. Prostaglandin
D. Antidiuretic hormone

Answer

To determine which hormone does not contain a polypeptide, we can follow these steps:

### Step 1: Understand the Types of Hormones
Hormones can be classified into three main categories based on their structure:
1. **Peptide Hormones**: These are made up of amino acids and include hormones like insulin and oxytocin.
2. **Lipid Derivatives**: These hormones are derived from lipids and include hormones like prostaglandins.
3. **Amino Acid Derivatives**: These hormones are derived from single amino acids.

### Step 2: Analyze the Given Options
The options provided are:
- **Insulin**
- **Oxytocin**
- **Prostaglandin**
- **Antidiuretic Hormone (ADH)**

### Step 3: Identify the Nature of Each Hormone
- **Insulin**: This is a peptide hormone composed of a chain of amino acids.
- **Oxytocin**: This is also a peptide hormone, consisting of a small number of amino acids.
- **Prostaglandin**: This is a lipid derivative hormone, not made of amino acids or polypeptides.
- **Antidiuretic Hormone (ADH)**: This is a peptide hormone as well.

### Step 4: Conclusion
From the analysis, we can conclude that:
- Insulin, oxytocin, and antidiuretic hormone are all polypeptide hormones.
- Prostaglandin is the only hormone among the options that does not contain a polypeptide.

### Final Answer
The hormone that does not contain a polypeptide is **Prostaglandin**.

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