Unlike eukaryotic cells, prokaryotic cells :

Options

A. lack a plasma membrane
B. do not have a nucleus
C. have RNA, not DNA
D. all of the above

Answer

To answer the question "Unlike eukaryotic cells, prokaryotic cells:", we need to analyze the options provided and understand the fundamental differences between prokaryotic and eukaryotic cells.

### Step-by-Step Solution:

1. **Understanding Eukaryotic Cells**:
- Eukaryotic cells are complex cells that contain membrane-bound organelles, including a true nucleus where the genetic material (DNA) is housed. Examples include plant and animal cells.

2. **Understanding Prokaryotic Cells**:
- Prokaryotic cells are simpler and smaller than eukaryotic cells. They do not have a true nucleus. Instead, their genetic material is located in a region called the nucleoid.

3. **Analyzing the Options**:
- **Option 1**: "Lack a plasma membrane" - This is incorrect. Prokaryotic cells do have a plasma membrane.
- **Option 2**: "Do not have a nucleus" - This is correct. Prokaryotic cells lack a true nucleus.
- **Option 3**: "Have RNA nor DNA" - This is incorrect. Prokaryotic cells contain both RNA and DNA.
- **Option 4**: "All of the above" - This is incorrect since options 1 and 3 are false.

4. **Conclusion**:
- The only correct statement regarding prokaryotic cells, in contrast to eukaryotic cells, is that they do not have a true nucleus. Therefore, the answer is **Option 2: do not have a nucleus**.

### Final Answer:
Unlike eukaryotic cells, prokaryotic cells do not have a nucleus.

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