In eubacteris, a cellular component that resembles eukaryotic cell is

Options

A. Plasma membrane
B. Nucleus
C. Ribosomes
D. Cell wall

Answer

To answer the question, "In eubacteria, a cellular component that resembles eukaryotic cell is?", we will analyze the options provided: plasma membrane, nucleus, ribosome, and cell wall.

### Step-by-Step Solution:

1. **Understanding Eubacteria**: Eubacteria are prokaryotic organisms, meaning they lack a true nucleus and other membrane-bound organelles that are characteristic of eukaryotic cells.

2. **Analyzing the Options**:
- **Plasma Membrane**:
- Both eubacteria (prokaryotes) and eukaryotes have a plasma membrane.
- The plasma membrane in both types of cells is composed of a lipid bilayer.
- Therefore, this component is similar in both eubacteria and eukaryotic cells.

- **Nucleus**:
- Prokaryotes, including eubacteria, do not have a true nucleus; instead, they have a nucleoid which lacks a nuclear membrane.
- Eukaryotes have a true nucleus enclosed by a nuclear membrane.
- Thus, this component is not similar between the two.

- **Ribosome**:
- Ribosomes are present in both prokaryotes and eukaryotes, but they differ in size.
- Prokaryotic ribosomes are 70S, while eukaryotic ribosomes are 80S.
- Therefore, this component is not the same.

- **Cell Wall**:
- Both eubacteria and some eukaryotes (like plants and fungi) have cell walls.
- However, the composition differs: eubacterial cell walls are primarily made of peptidoglycan, while plant cell walls are made of cellulose and fungal cell walls are made of chitin.
- Hence, this component is also not similar.

3. **Conclusion**: After analyzing all the options, the only cellular component that resembles that of eukaryotic cells in eubacteria is the **plasma membrane**.

### Final Answer:
The correct answer is **plasma membrane** (Option A).

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