Mycoplasma differs from becteria in the absence of

Options

A. DNA
B. Ribosome
C. Cell membrane
D. Cell wall.

Answer

**Step-by-Step Solution:**

1. **Understanding the Organisms**: Mycoplasma and bacteria are both classified as prokaryotes, which means they lack a true nucleus and membrane-bound organelles.

2. **Analyzing the Options**: The question asks how Mycoplasma differs from bacteria. The options provided are:
- A) DNA
- B) Ribosome
- C) Cell Membrane
- D) Cell Wall

3. **Evaluating DNA**: Both Mycoplasma and bacteria contain DNA, which is present in the form of a nucleoid. Therefore, option A (DNA) is not correct.

4. **Evaluating Ribosomes**: Both types of organisms have ribosomes, which are 70S in size. Thus, option B (Ribosome) is also not correct.

5. **Evaluating Cell Membrane**: Both Mycoplasma and bacteria possess a cell membrane, which is a lipid bilayer. Therefore, option C (Cell Membrane) is not correct.

6. **Evaluating Cell Wall**: Bacteria have a cell wall made of peptidoglycan, while Mycoplasma do not have a cell wall at all. This absence allows Mycoplasma to exist in various shapes (pleomorphic). Therefore, option D (Cell Wall) is correct.

7. **Conclusion**: Mycoplasma differs from bacteria in the absence of a cell wall.

**Final Answer**: Mycoplasma differs from bacteria in the absence of **Cell Wall** (Option D).

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