Describe the structure of a nucleosome.

Explanation

### Step-by-Step Text Solution for the Structure of a Nucleosome

1. **Definition of a Nucleosome**: A nucleosome is the fundamental unit of DNA packaging in eukaryotic cells, consisting of a segment of DNA wrapped around a core of histone proteins.

2. **Visual Representation**: Imagine the structure as "beads on a string." The "beads" represent the nucleosomes, while the "string" represents the DNA.

3. **Components of a Nucleosome**:
- **Histone Proteins**: There are five types of histone proteins involved in forming a nucleosome:
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