Nucleosome model proposed by :–

Options

A. Du–Praw
B. Kornberg and Thomas
C. Sleffensen
D. Waldeyer and Taylor

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the origin of the Nucleosome Model, specifically who proposed it.

2. **Analyzing the Options**:
- **Option 1: DU Pro**: This option is incorrect. DU Pro proposed the Folded Fibre Model of Chromosome in 1965, not the Nucleosome Model.
- **Option 2: Kornberg and Thomas**: This option is correct. Roger Kornberg, along with Thomas, proposed the Nucleosome Model. They observed particles using an electron microscope, which led to the understanding of the nucleosome structure.
- **Option 3: Lefthansense**: There is no significant contribution to the Nucleosome Model attributed to Lefthansense, making this option incorrect.
- **Option 4: Waldier and Teller**: Similar to Lefthansense, Waldier and Teller are not known for proposing the Nucleosome Model, thus this option is also incorrect.

3. **Conclusion**: After analyzing all the options, the correct answer is **Kornberg and Thomas**.

**Final Answer**: The Nucleosome Model was proposed by **Kornberg and Thomas**.

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