Which of the following is not true of a eukaryotic cell

Options

A. Cell wall is made up of peptidoglycans
B. It has 80S type of ribosome present in the cytoplasm
C. Mitochondria contain circular DNA
D. Membrane bound organelles are present

Explanation

To determine which statement is not true of a eukaryotic cell, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Identify the Options**: We need to examine the statements given in the question regarding eukaryotic cells.

2. **Evaluate the First Option**:
- The first option states that "the cell wall is made up of peptidoglycan."
- Peptidoglycan is a structural component found in the cell walls of bacteria (prokaryotes), not in eukaryotic cells.
- Eukaryotic cells, particularly plant cells, have cell walls made of cellulose, hemicellulose, and pectin, while animal cells do not have a cell wall at all.
- **Conclusion**: This statement is **not true** for eukaryotic cells.

3. **Evaluate the Second Option**:
- The second option states that "it has 80S type of ribosomes present in the cytoplasm."
- This is true. Eukaryotic cells contain 80S ribosomes in their cytoplasm, which are larger than the 70S ribosomes found in prokaryotic cells and in the mitochondria of eukaryotic cells.
- **Conclusion**: This statement is **true** for eukaryotic cells.

4. **Evaluate the Third Option**:
- The third option states that "mitochondria contain circular DNA."
- This is also true. Mitochondria have their own circular DNA, similar to prokaryotic cells, which supports the endosymbiotic theory.
- **Conclusion**: This statement is **true** for eukaryotic cells.

5. **Evaluate the Fourth Option**:
- The fourth option states that "membrane-bound organelles are present."
- This is true as well. Eukaryotic cells are characterized by the presence of membrane-bound organelles such as the nucleus, endoplasmic reticulum, Golgi apparatus, and mitochondria.
- **Conclusion**: This statement is **true** for eukaryotic cells.

6. **Final Conclusion**: Based on the evaluations, the only statement that is not true for a eukaryotic cell is the first option: "the cell wall is made up of peptidoglycan."

### Answer:
The statement that is not true of a eukaryotic cell is: **"the cell wall is made up of peptidoglycan."**

---