Which one of the following is same in E.coli and Chlamydomonas?

Options

A. Cell wall
B. Cell organelles
C. Ribosomes
D. Mesosomes.

Answer

To answer the question "Which one of the following is the same in E. coli and Chlamydomonas?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organisms**:
- E. coli is a bacterium that belongs to the kingdom Monera (prokaryote).
- Chlamydomonas is a unicellular green alga that belongs to the kingdom Plantae (eukaryote).

2. **Compare Cell Structure**:
- E. coli has a cell wall made of peptidoglycan.
- Chlamydomonas has a cell wall made of cellulose.
- Since the composition of the cell walls is different, this option is not the same for both organisms.

3. **Examine Cell Organelles**:
- E. coli, being a prokaryote, lacks membrane-bound organelles.
- Chlamydomonas, being a eukaryote, contains membrane-bound organelles such as chloroplasts, mitochondria, etc.
- Therefore, this option is also not the same for both organisms.

4. **Focus on Ribosomes**:
- Both E. coli and Chlamydomonas contain ribosomes, which are non-membrane-bound organelles.
- E. coli has 70S ribosomes, and Chlamydomonas also has ribosomes, although they may be of a different type (80S in eukaryotes).
- This indicates that ribosomes are present in both organisms.

5. **Conclusion**:
- The correct answer to the question is that both E. coli and Chlamydomonas have ribosomes, making this the feature that is the same in both organisms.

### Final Answer:
Ribosomes are the same in E. coli and Chlamydomonas.

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