The thread like structure in the cell first described by Porter are

Options

A. Chromatin reticulum
B. Endoplasmic reticulum
C. Golig complex
D. Microfibrils

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the thread-like structure in the cell that was first described by Porter. We need to identify which of the given options fits this description.

2. **Analyzing the Options**:
- **Chromatin Reticulum**: This refers to the complex of DNA and proteins found in the nucleus, but it was not first described by Porter.
- **Endoplasmic Reticulum (ER)**: This is a network of membrane-bound cavities in the cell and was indeed first described by Porter.
- **Golgi Complex**: This structure was first observed by Camillo Golgi, not Porter.
- **Microfibrils**: These are structural components but are not specifically associated with Porter.

3. **Identifying the Correct Answer**: Since the endoplasmic reticulum was first described by Porter, it is the correct answer to the question.

4. **Conclusion**: The thread-like structure in the cell first described by Porter is the **Endoplasmic Reticulum**.

**Final Answer**: Endoplasmic Reticulum

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