Which is correct about the given organelles

Options

A. Both animal and plant cells have a well defined cell wall
B. Cells are formed de nova from abiotic materials
C. Cells of all living organisms have a nucleus
D. In prokaryotes there are no membrane bound cell organelle.

Answer

To solve the question regarding which statement is correct about the given organelles, we will analyze each option step by step.

### Step-by-Step Solution:

1. **Evaluate Option 1**: "Both animal and plant cells have a well-defined cell wall."
- **Analysis**: This statement is incorrect. Plant cells have a cell wall made of cellulose, while animal cells do not have a cell wall; they only have a cell membrane. Thus, this option is false.

2. **Evaluate Option 2**: "Cells are formed de novo from abiotic materials."
- **Analysis**: This statement is also incorrect. Cells are formed from biotic materials, meaning they arise from pre-existing cells and utilize biomolecules. Thus, this option is false.

3. **Evaluate Option 3**: "Cells of all living organisms have a nucleus."
- **Analysis**: This statement is incorrect. For example, mature red blood cells (RBCs) in mammals do not have a nucleus, and certain plant cells, like sieve tubes, also lack a nucleus. Therefore, this option is false.

4. **Evaluate Option 4**: "In prokaryotes, there are no membrane-bound organelles."
- **Analysis**: This statement is correct. Prokaryotic cells, which include bacteria, do not have membrane-bound organelles such as the endoplasmic reticulum, mitochondria, or Golgi apparatus. Thus, this option is true.

### Conclusion:
The correct statement among the options provided is that in prokaryotes, there are no membrane-bound organelles. Therefore, the answer is Option 4.

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