Structures observed both in prokaryotic and eukaryotic cells are

Options

A. ribosomes , cytoplasm, plasma membrane
B. ribosomes , membrane bound cell organelles, cytoplasm
C. ribosomes, microbodies, cacuoles
D. ribosomes, nucleus, membrane bound cell organelles.

Answer

To solve the question regarding the structures observed in both prokaryotic and eukaryotic cells, we will analyze the options provided and identify the common structures.

### Step-by-Step Solution:

1. **Identify the Structures**: We need to determine which structures are present in both prokaryotic and eukaryotic cells. The key structures to consider include ribosomes, cytoplasm, and plasma membrane.

2. **Evaluate Each Option**:
- **Option 1**: Ribosomes, Cytoplasm, Plasma Membrane
- **Ribosomes**: Present in both prokaryotic and eukaryotic cells. They are the sites of protein synthesis.
- **Cytoplasm**: Found in both types of cells. It supports and suspends organelles.
- **Plasma Membrane**: Present in both prokaryotic and eukaryotic cells, it regulates the passage of substances in and out of the cell.
- **Conclusion**: This option is correct.

- **Option 2**: Ribosomes, Membrane-bound cell organelles, Cytoplasm
- **Membrane-bound cell organelles**: These are only found in eukaryotic cells (e.g., nucleus, mitochondria). Prokaryotic cells do not have these structures.
- **Conclusion**: This option is incorrect.

- **Option 3**: Ribosomes, Microbodies, Vacuoles
- **Microbodies**: These are typically found in eukaryotic cells.
- **Vacuoles**: While some prokaryotic cells may have structures that serve similar functions, true vacuoles are primarily found in eukaryotic cells.
- **Conclusion**: This option is incorrect.

- **Option 4**: Ribosomes, Nucleus, Membrane-bound cell organelles
- **Nucleus**: Only present in eukaryotic cells. Prokaryotic cells do not have a nucleus.
- **Conclusion**: This option is incorrect.

3. **Final Answer**: Based on the analysis, the correct answer is **Option 1: Ribosomes, Cytoplasm, Plasma Membrane**.