Which of the following is not true for 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 for a eukaryotic cell, we will analyze each option provided.

### Step 1: Analyze the first statement
- **Statement**: "Cell wall is made up of peptidoglycans."
- **Analysis**: In eukaryotic cells, the cell wall is present in some groups like plants, fungi, and protists. However, the composition of the cell wall in these organisms is primarily cellulose (in plants) or chitin (in fungi), not peptidoglycans. Peptidoglycans are found in the cell walls of prokaryotic cells, particularly bacteria.
- **Conclusion**: This statement is **not true** for eukaryotic cells.

### Step 2: Analyze the second statement
- **Statement**: "It has 80S types of ribosome present in the cytoplasm."
- **Analysis**: Eukaryotic cells contain ribosomes that are classified as 80S, which consist of a 60S large subunit and a 40S small subunit. This is a characteristic feature of eukaryotic cells.
- **Conclusion**: This statement is **true**.

### Step 3: Analyze the third statement
- **Statement**: "Mitochondria contains circular DNA."
- **Analysis**: Mitochondria are indeed semi-autonomous organelles that contain their own circular DNA, which allows them to replicate independently of the cell. This is a well-established fact about mitochondria.
- **Conclusion**: This statement is **true**.

### Step 4: Analyze the fourth statement
- **Statement**: "Membrane-bound organelles are present."
- **Analysis**: Eukaryotic cells are characterized by the presence of membrane-bound organelles, such as the nucleus, endoplasmic reticulum, Golgi apparatus, and mitochondria. All organelles, except ribosomes, are membrane-bound.
- **Conclusion**: This statement is **true**.

### Final Conclusion
The only statement that is not true for a eukaryotic cell is the first one: "Cell wall is made up of peptidoglycans."

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