Which ovarian hormone is proteinaceous ?

Options

A. Estradiol
B. Progesterone
C. Relaxin
D. Human chorinonic gonadotropin.

Answer

To determine which ovarian hormone is proteinaceous, we will analyze the given options and identify their nature.

### Step-by-Step Solution:

1. **Understand the term "proteinaceous":**
- Proteinaceous hormones are those that are made up of proteins or peptides. They are typically larger molecules compared to steroid hormones.

2. **List the given ovarian hormones:**
- The options provided are:
- Estradiol
- Progesterone
- Relaxin
- Human chorionic gonadotropin (hCG)

3. **Identify the nature of each hormone:**
- **Estradiol:** This is a type of estrogen and is a steroid hormone, derived from cholesterol.
- **Progesterone:** This is also a steroid hormone, primarily involved in the menstrual cycle and pregnancy, and is derived from cholesterol.
- **Relaxin:** This hormone is known to be a peptide hormone, which means it is made of protein.
- **Human chorionic gonadotropin (hCG):** This is a glycoprotein hormone produced during pregnancy, which is also proteinaceous.

4. **Determine the correct answer:**
- While both Relaxin and hCG are proteinaceous, the question specifically asks for an ovarian hormone. Relaxin is produced by the ovaries during pregnancy, making it the correct answer in the context of ovarian hormones.

5. **Final Answer:**
- The ovarian hormone that is proteinaceous is **Relaxin**.