A membranous spherical structure found in the nucleoplasm is

Options

A. Chromatin
B. Nucleolus
C. Histones
D. All

Answer

To solve the question "A membranous spherical structure found in the nucleoplasm is," we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Nucleoplasm**:
- The nucleoplasm is a gel-like substance within the nucleus, similar to cytoplasm in the cell. It is surrounded by the nuclear membrane.

2. **Identify Structures in the Nucleoplasm**:
- The nucleoplasm contains various structures, including chromatin, nucleolus, and proteins such as histones.

3. **Analyze the Options**:
- **Chromatin**: This is not a spherical structure; it is a fibrous material that forms chromosomes.
- **Nucleolus**: This is a prominent spherical structure found within the nucleoplasm. It is involved in the production of ribosomes and is indeed membranous.
- **Histones**: These are proteins that help package DNA into nucleosomes; they are not spherical structures.
- **All of the Above**: Since only the nucleolus fits the description of a membranous spherical structure, this option cannot be correct.

4. **Select the Correct Answer**:
- Based on the analysis, the correct answer is **nucleolus**.

### Final Answer:
The membranous spherical structure found in the nucleoplasm is the **nucleolus**.

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