Define nucleoplasm.

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Nucleoplasm**: Nucleoplasm is a substance found within the nucleus of a cell. It is similar to cytoplasm but is specifically located inside the nuclear membrane.

2. **Nature of Nucleoplasm**: Nucleoplasm is a clear, gel-like fluid. It is non-staining, meaning that it does not react with dyes or staining substances, which makes it distinct in appearance.

3. **Separation from Cytoplasm**: Nucleoplasm is separated from the cytoplasm by the nuclear membrane. This membrane acts as a barrier, ensuring that the contents of the nucleus are distinct from those in the cytoplasm.

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