Find out incorrect match :-

Options

A. Inducer - Lactose
B. Euchromatic - Inactive chromatin
C. DNA packaging - Nucleosome
D. Prokaryotic DNA - Nucleoid

Answer

To solve the question "Find out incorrect match," we will analyze each option provided in the question and determine if the matches are correct or incorrect.

### Step-by-Step Solution:

1. **Inducer - Lactose**:
- Lactose acts as an inducer in the lac operon of bacteria. When lactose is present, it binds to the repressor protein, causing it to release from the operator region of the operon. This allows the transcription of genes necessary for lactose metabolism.
- **Conclusion**: This match is correct.

2. **Eukaryotic - Inactive Chromatin**:
- In eukaryotic cells, chromatin can exist in two forms: euchromatin (active, lightly packed) and heterochromatin (inactive, densely packed). The term "inactive chromatin" typically refers to heterochromatin, which is not exclusive to eukaryotes as both forms can exist in eukaryotic cells.
- **Conclusion**: This match is incorrect because it inaccurately pairs eukaryotic with inactive chromatin without specifying that inactive chromatin is heterochromatin.

3. **DNA Packaging - Nucleosome**:
- Nucleosomes are the fundamental units of DNA packaging in eukaryotic cells. They consist of DNA wrapped around histone proteins, allowing for the compaction of DNA into a more manageable form within the nucleus.
- **Conclusion**: This match is correct.

4. **Prokaryotic DNA - Nucleoid**:
- In prokaryotic cells, the DNA is not enclosed within a membrane-bound nucleus. Instead, it is found in a region called the nucleoid, which is an irregularly shaped area within the cell.
- **Conclusion**: This match is correct.

### Final Answer:
The incorrect match is **Eukaryotic - Inactive Chromatin**.

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