Cell organelle not found in erythrocytes of many mammals is

Options

A. Mitochondria
B. Ribosomes
C. Nucleus
D. All

Answer

**Step-by-Step Solution:**

1. **Understanding Erythrocytes**: Erythrocytes, commonly known as red blood cells, are specialized cells in mammals that primarily function to transport oxygen throughout the body.

2. **Defining E-nucleate**: Erythrocytes in many mammals are described as "E-nucleate," meaning they lack a nucleus. This is a key characteristic of these cells.

3. **Identifying Cell Organelles**: Cell organelles are specialized structures within cells that perform distinct functions. Common organelles include:
- Nucleus
- Mitochondria
- Golgi apparatus
- Ribosomes
- Endoplasmic reticulum

4. **Absence of Organelles in Erythrocytes**: In the case of mammalian erythrocytes, they do not contain a nucleus or any other organelles. This absence allows for more space within the cell to accommodate hemoglobin, the protein responsible for oxygen transport.

5. **Conclusion**: Since erythrocytes lack a nucleus and other organelles such as mitochondria, ribosomes, and Golgi apparatus, the answer to the question "Cell organelle not found in erythrocytes of many mammals" is that all of these organelles are absent.

6. **Final Answer**: The correct option is D: all.

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