Estrogen and testosterone hormones bind to

Options

A. cytoplasmic receptors
B. G-protein membrane proteins
C. Enzyme linked proteins
D. membrane receptors

Answer

To answer the question about where estrogen and testosterone hormones bind, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Nature of the Hormones**:
- Estrogen and testosterone are both classified as steroid hormones.

2. **Understand the Characteristics of Steroid Hormones**:
- Steroid hormones are lipid-soluble, which allows them to easily cross the plasma membrane of cells.

3. **Determine the Binding Sites**:
- Once inside the cell, steroid hormones typically bind to specific receptors. These receptors can be located in the cytoplasm or the nucleus of the cell.

4. **Evaluate the Options**:
- The options given are:
- Cytoplasmic receptors
- G protein membrane proteins
- Enzyme-linked proteins
- Membrane receptors
- Since steroid hormones can cross the plasma membrane, they are most likely to bind to cytoplasmic receptors.

5. **Select the Correct Answer**:
- Based on the characteristics of steroid hormones and their binding sites, the correct answer is that estrogen and testosterone bind to **cytoplasmic receptors**.

### Final Answer:
Estrogen and testosterone hormones bind to **cytoplasmic receptors**.

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