Who discovered virus to be nucleoprotein entity ?

Options

A. Causius
B. Pasteur
C. Ivanowski
D. Bawden and Piria.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the scientist(s) who discovered that viruses are nucleoprotein entities. This means we need to identify the researchers who established that viruses consist of nucleic acids (RNA or DNA) and proteins.

2. **Identifying Key Scientists**: The video mentions two scientists, Borden and Piret, who conducted research on the Tobacco Mosaic Virus (TMV).

3. **Research on Tobacco Mosaic Virus (TMV)**: Borden and Piret studied the TMV, which is one of the first viruses to be discovered. During their research, they found that TMV contains ribonucleic acid (RNA).

4. **Significance of Their Discovery**: Their findings demonstrated that the genetic material of the TMV is RNA, which is a crucial component of the virus, thus confirming that viruses are indeed nucleoprotein entities.

5. **Conclusion**: Therefore, the scientists who discovered that viruses are nucleoprotein entities are Borden and Piret.

**Final Answer**: Borden and Piret.

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