Which of the following hormones is not chemically glycoprotein

Options

A. Growth hormone
B. Prolactin
C. Luteinising hormone
D. Estrogen.

Answer

To determine which hormone is not chemically a glycoprotein, we can follow these steps:

### Step-by-Step Solution:

1. **Understand Hormone Classification**:
- Hormones can be classified based on their chemical structure. The main categories include steroid hormones, amino acid-derived hormones, and peptide (or glycoprotein) hormones.

2. **Identify the Hormones in the Options**:
- The hormones given in the options are:
- Growth Hormone (GH)
- Prolactin (PRL)
- Luteinizing Hormone (LH)
- Estrogen

3. **Classify Each Hormone**:
- **Growth Hormone (GH)**: This is a peptide hormone and is classified as a glycoprotein.
- **Prolactin (PRL)**: This is also a peptide hormone and is classified as a glycoprotein.
- **Luteinizing Hormone (LH)**: This hormone is a glycoprotein as well.
- **Estrogen**: This is a steroid hormone derived from cholesterol and is not a glycoprotein.

4. **Conclusion**:
- Among the options provided, estrogen is the only hormone that is not chemically a glycoprotein. It is a steroid hormone.

### Final Answer:
The hormone that is not chemically a glycoprotein is **Estrogen**.

---